1 | /* SimpleFit.c |
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2 | |
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3 | A simplified project designed to act as a template for your curve fitting function. |
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4 | The fitting function is a simple polynomial. It works but is of no practical use. |
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5 | */ |
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6 | |
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7 | #include "StandardHeaders.h" // Include ANSI headers, Mac headers, IgorXOP.h, XOP.h and XOPSupport.h |
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8 | #include "libStructureFactor.h" |
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9 | |
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10 | |
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11 | //Hard Sphere Structure Factor |
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12 | // |
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13 | double |
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14 | HardSphereStruct(double dp[], double q) |
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15 | { |
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16 | double denom,dnum,alpha,beta,gamm,a,asq,ath,afor,rca,rsa; |
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17 | double calp,cbeta,cgam,prefac,c,vstruc; |
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18 | double r,phi,struc; |
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19 | |
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20 | r = dp[0]; |
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21 | phi = dp[1]; |
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22 | // compute constants |
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23 | denom = pow((1.0-phi),4); |
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24 | dnum = pow((1.0 + 2.0*phi),2); |
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25 | alpha = dnum/denom; |
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26 | beta = -6.0*phi*pow((1.0 + phi/2.0),2)/denom; |
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27 | gamm = 0.50*phi*dnum/denom; |
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28 | // |
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29 | // calculate the structure factor |
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30 | // |
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31 | a = 2.0*q*r; |
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32 | asq = a*a; |
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33 | ath = asq*a; |
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34 | afor = ath*a; |
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35 | rca = cos(a); |
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36 | rsa = sin(a); |
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37 | calp = alpha*(rsa/asq - rca/a); |
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38 | cbeta = beta*(2.0*rsa/asq - (asq - 2.0)*rca/ath - 2.0/ath); |
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39 | cgam = gamm*(-rca/a + (4.0/a)*((3.0*asq - 6.0)*rca/afor + (asq - 6.0)*rsa/ath + 6.0/afor)); |
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40 | prefac = -24.0*phi/a; |
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41 | c = prefac*(calp + cbeta + cgam); |
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42 | vstruc = 1.0/(1.0-c); |
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43 | struc = vstruc; |
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44 | |
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45 | return(struc); |
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46 | } |
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47 | |
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48 | //Sticky Hard Sphere Structure Factor |
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49 | // |
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50 | double |
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51 | StickyHS_Struct(double dp[], double q) |
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52 | { |
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53 | double qv; |
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54 | double rad,phi,eps,tau,eta; |
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55 | double sig,aa,etam1,qa,qb,qc,radic; |
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56 | double lam,lam2,test,mu,alpha,beta; |
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57 | double kk,k2,k3,ds,dc,aq1,aq2,aq3,aq,bq1,bq2,bq3,bq,sq; |
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58 | |
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59 | qv= q; |
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60 | rad = dp[0]; |
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61 | phi = dp[1]; |
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62 | eps = dp[2]; |
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63 | tau = dp[3]; |
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64 | |
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65 | eta = phi/(1.0-eps)/(1.0-eps)/(1.0-eps); |
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66 | |
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67 | sig = 2.0 * rad; |
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68 | aa = sig/(1.0 - eps); |
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69 | etam1 = 1.0 - eta; |
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70 | //C |
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71 | //C SOLVE QUADRATIC FOR LAMBDA |
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72 | //C |
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73 | qa = eta/12.0; |
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74 | qb = -1.0*(tau + eta/(etam1)); |
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75 | qc = (1.0 + eta/2.0)/(etam1*etam1); |
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76 | radic = qb*qb - 4.0*qa*qc; |
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77 | if(radic<0) { |
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78 | //if(x>0.01 && x<0.015) |
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79 | // Print "Lambda unphysical - both roots imaginary" |
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80 | //endif |
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81 | return(-1.0); |
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82 | } |
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83 | //C KEEP THE SMALLER ROOT, THE LARGER ONE IS UNPHYSICAL |
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84 | lam = (-1.0*qb-sqrt(radic))/(2.0*qa); |
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85 | lam2 = (-1.0*qb+sqrt(radic))/(2.0*qa); |
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86 | if(lam2<lam) { |
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87 | lam = lam2; |
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88 | } |
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89 | test = 1.0 + 2.0*eta; |
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90 | mu = lam*eta*etam1; |
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91 | if(mu>test) { |
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92 | //if(x>0.01 && x<0.015) |
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93 | // Print "Lambda unphysical mu>test" |
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94 | //endif |
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95 | return(-1.0); |
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96 | } |
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97 | alpha = (1.0 + 2.0*eta - mu)/(etam1*etam1); |
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98 | beta = (mu - 3.0*eta)/(2.0*etam1*etam1); |
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99 | //C |
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100 | //C CALCULATE THE STRUCTURE FACTOR |
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101 | //C |
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102 | kk = qv*aa; |
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103 | k2 = kk*kk; |
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104 | k3 = kk*k2; |
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105 | ds = sin(kk); |
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106 | dc = cos(kk); |
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107 | aq1 = ((ds - kk*dc)*alpha)/k3; |
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108 | aq2 = (beta*(1.0-dc))/k2; |
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109 | aq3 = (lam*ds)/(12.0*kk); |
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110 | aq = 1.0 + 12.0*eta*(aq1+aq2-aq3); |
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111 | // |
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112 | bq1 = alpha*(0.5/kk - ds/k2 + (1.0 - dc)/k3); |
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113 | bq2 = beta*(1.0/kk - ds/k2); |
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114 | bq3 = (lam/12.0)*((1.0 - dc)/kk); |
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115 | bq = 12.0*eta*(bq1+bq2-bq3); |
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116 | // |
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117 | sq = 1.0/(aq*aq +bq*bq); |
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118 | |
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119 | return(sq); |
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120 | } |
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121 | |
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122 | |
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123 | |
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124 | // SUBROUTINE SQWELL: CALCULATES THE STRUCTURE FACTOR FOR A |
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125 | // DISPERSION OF MONODISPERSE HARD SPHERES |
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126 | // IN THE Mean Spherical APPROXIMATION ASSUMING THE SPHERES |
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127 | // INTERACT THROUGH A SQUARE WELL POTENTIAL. |
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128 | //** not the best choice of closure ** see note below |
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129 | // REFS: SHARMA,SHARMA, PHYSICA 89A,(1977),212 |
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130 | double |
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131 | SquareWellStruct(double dp[], double q) |
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132 | { |
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133 | double req,phis,edibkb,lambda,struc; |
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134 | double sigma,eta,eta2,eta3,eta4,etam1,etam14,alpha,beta,gamm; |
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135 | double x,sk,sk2,sk3,sk4,t1,t2,t3,t4,ck; |
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136 | |
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137 | x= q; |
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138 | |
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139 | req = dp[0]; |
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140 | phis = dp[1]; |
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141 | edibkb = dp[2]; |
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142 | lambda = dp[3]; |
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143 | |
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144 | sigma = req*2.; |
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145 | eta = phis; |
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146 | eta2 = eta*eta; |
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147 | eta3 = eta*eta2; |
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148 | eta4 = eta*eta3; |
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149 | etam1 = 1. - eta; |
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150 | etam14 = etam1*etam1*etam1*etam1; |
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151 | alpha = ( pow((1. + 2.*eta),2) + eta3*( eta-4.0 ) )/etam14; |
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152 | beta = -(eta/3.0) * ( 18. + 20.*eta - 12.*eta2 + eta4 )/etam14; |
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153 | gamm = 0.5*eta*( pow((1. + 2.*eta),2) + eta3*(eta-4.) )/etam14; |
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154 | // |
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155 | // calculate the structure factor |
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156 | |
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157 | sk = x*sigma; |
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158 | sk2 = sk*sk; |
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159 | sk3 = sk*sk2; |
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160 | sk4 = sk3*sk; |
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161 | t1 = alpha * sk3 * ( sin(sk) - sk * cos(sk) ); |
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162 | t2 = beta * sk2 * ( 2.*sk*sin(sk) - (sk2-2.)*cos(sk) - 2.0 ); |
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163 | t3 = ( 4.0*sk3 - 24.*sk ) * sin(sk); |
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164 | t3 = t3 - ( sk4 - 12.0*sk2 + 24.0 )*cos(sk) + 24.0; |
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165 | t3 = gamm*t3; |
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166 | t4 = -edibkb*sk3*(sin(lambda*sk) - lambda*sk*cos(lambda*sk)+ sk*cos(sk) - sin(sk) ); |
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167 | ck = -24.0*eta*( t1 + t2 + t3 + t4 )/sk3/sk3; |
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168 | struc = 1./(1.-ck); |
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169 | |
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170 | return(struc); |
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171 | } |
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172 | |
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173 | // Hayter-Penfold (rescaled) MSA structure factor for screened Coulomb interactions |
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174 | // |
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175 | double |
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176 | HayterPenfoldMSA(double dp[], double q) |
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177 | { |
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178 | double Elcharge=1.602189e-19; // electron charge in Coulombs (C) |
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179 | double kB=1.380662e-23; // Boltzman constant in J/K |
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180 | double FrSpPerm=8.85418782E-12; //Permittivity of free space in C^2/(N m^2) |
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181 | double SofQ, QQ, Qdiam, Vp, csalt, ss; |
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182 | double VolFrac, SIdiam, diam, Kappa, cs, IonSt; |
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183 | double dialec, Perm, Beta, Temp, zz, charge; |
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184 | double pi; |
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185 | int ierr; |
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186 | |
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187 | pi = 4.0*atan(1.); |
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188 | QQ= q; |
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189 | |
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190 | diam=dp[0]; //in A |
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191 | zz = dp[1]; //# of charges |
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192 | VolFrac=dp[2]; |
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193 | Temp=dp[3]; //in degrees Kelvin |
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194 | csalt=dp[4]; //in molarity |
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195 | dialec=dp[5]; // unitless |
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196 | //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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197 | //////////////////////////// convert to USEFUL inputs in SI units // |
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198 | //////////////////////////// NOTE: easiest to do EVERYTHING in SI units // |
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199 | //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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200 | Beta=1.0/(kB*Temp); // in Joules^-1 |
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201 | Perm=dialec*FrSpPerm; //in C^2/(N m^2) |
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202 | charge=zz*Elcharge; //in Coulomb (C) |
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203 | SIdiam = diam*1E-10; //in m |
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204 | Vp=4.0*pi/3.0*(SIdiam/2.0)*(SIdiam/2.0)*(SIdiam/2.0); //in m^3 |
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205 | cs=csalt*6.022E23*1E3; //# salt molecules/m^3 |
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206 | |
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207 | // Compute the derived values of : |
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208 | // Ionic strength IonSt (in C^2/m^3) |
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209 | // Kappa (Debye-Huckel screening length in m) |
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210 | // and gamma Exp(-k) |
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211 | IonSt=0.5 * Elcharge*Elcharge*(zz*VolFrac/Vp+2.0*cs); |
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212 | Kappa=sqrt(2*Beta*IonSt/Perm); //Kappa calc from Ionic strength |
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213 | // Kappa=2/SIdiam // Use to compare with HP paper |
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214 | gMSAWave[5]=Beta*charge*charge/(pi*Perm*SIdiam*pow((2.0+Kappa*SIdiam),2)); |
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215 | |
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216 | // Finally set up dimensionless parameters |
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217 | Qdiam=QQ*diam; |
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218 | gMSAWave[6] = Kappa*SIdiam; |
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219 | gMSAWave[4] = VolFrac; |
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220 | |
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221 | //Function sqhpa(qq) {this is where Hayter-Penfold program began} |
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222 | |
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223 | // FIRST CALCULATE COUPLING |
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224 | |
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225 | ss=pow(gMSAWave[4],(1.0/3.0)); |
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226 | gMSAWave[9] = 2.0*ss*gMSAWave[5]*exp(gMSAWave[6]-gMSAWave[6]/ss); |
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227 | |
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228 | // CALCULATE COEFFICIENTS, CHECK ALL IS WELL |
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229 | // AND IF SO CALCULATE S(Q*SIG) |
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230 | |
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231 | ierr=0; |
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232 | ierr=sqcoef(ierr); |
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233 | if (ierr>=0) { |
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234 | SofQ=sqhcal(Qdiam); |
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235 | }else{ |
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236 | //SofQ=NaN; |
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237 | SofQ=-1.0; |
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238 | // print "Error Level = ",ierr |
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239 | // print "Please report HPMSA problem with above error code" |
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240 | } |
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241 | |
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242 | return(SofQ); |
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243 | } |
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244 | |
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245 | |
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246 | |
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247 | ///////////////////////////////////////////////////////////// |
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248 | ///////////////////////////////////////////////////////////// |
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249 | // |
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250 | // |
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251 | // CALCULATES RESCALED VOLUME FRACTION AND CORRESPONDING |
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252 | // COEFFICIENTS FOR "SQHPA" |
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253 | // |
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254 | // JOHN B. HAYTER (I.L.L.) 14-SEP-81 |
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255 | // |
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256 | // ON EXIT: |
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257 | // |
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258 | // SETA IS THE RESCALED VOLUME FRACTION |
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259 | // SGEK IS THE RESCALED CONTACT POTENTIAL |
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260 | // SAK IS THE RESCALED SCREENING CONSTANT |
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261 | // A,B,C,F,U,V ARE THE MSA COEFFICIENTS |
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262 | // G1= G(1+) IS THE CONTACT VALUE OF G(R/SIG): |
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263 | // FOR THE GILLAN CONDITION, THE DIFFERENCE FROM |
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264 | // ZERO INDICATES THE COMPUTATIONAL ACCURACY. |
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265 | // |
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266 | // IR > 0: NORMAL EXIT, IR IS THE NUMBER OF ITERATIONS. |
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267 | // < 0: FAILED TO CONVERGE |
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268 | // |
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269 | int |
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270 | sqcoef(int ir) |
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271 | { |
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272 | int itm=40,ix,ig,ii; |
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273 | double acc=5.0E-6,del,e1,e2,f1,f2; |
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274 | |
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275 | // WAVE gMSAWave = $"root:HayPenMSA:gMSAWave" |
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276 | f1=0; //these were never properly initialized... |
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277 | f2=0; |
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278 | |
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279 | ig=1; |
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280 | if (gMSAWave[6]>=(1.0+8.0*gMSAWave[4])) { |
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281 | ig=0; |
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282 | gMSAWave[15]=gMSAWave[14]; |
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283 | gMSAWave[16]=gMSAWave[4]; |
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284 | ix=1; |
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285 | ir = sqfun(ix,ir); |
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286 | gMSAWave[14]=gMSAWave[15]; |
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287 | gMSAWave[4]=gMSAWave[16]; |
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288 | if((ir<0.0) || (gMSAWave[14]>=0.0)) { |
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289 | return ir; |
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290 | } |
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291 | } |
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292 | gMSAWave[10]=fmin(gMSAWave[4],0.20); |
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293 | if ((ig!=1) || ( gMSAWave[9]>=0.15)) { |
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294 | ii=0; |
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295 | do { |
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296 | ii=ii+1; |
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297 | if(ii>itm) { |
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298 | ir=-1; |
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299 | return ir; |
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300 | } |
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301 | if (gMSAWave[10]<=0.0) { |
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302 | gMSAWave[10]=gMSAWave[4]/ii; |
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303 | } |
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304 | if(gMSAWave[10]>0.6) { |
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305 | gMSAWave[10] = 0.35/ii; |
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306 | } |
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307 | e1=gMSAWave[10]; |
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308 | gMSAWave[15]=f1; |
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309 | gMSAWave[16]=e1; |
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310 | ix=2; |
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311 | ir = sqfun(ix,ir); |
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312 | f1=gMSAWave[15]; |
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313 | e1=gMSAWave[16]; |
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314 | e2=gMSAWave[10]*1.01; |
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315 | gMSAWave[15]=f2; |
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316 | gMSAWave[16]=e2; |
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317 | ix=2; |
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318 | ir = sqfun(ix,ir); |
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319 | f2=gMSAWave[15]; |
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320 | e2=gMSAWave[16]; |
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321 | e2=e1-(e2-e1)*f1/(f2-f1); |
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322 | gMSAWave[10] = e2; |
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323 | del = fabs((e2-e1)/e1); |
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324 | } while (del>acc); |
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325 | gMSAWave[15]=gMSAWave[14]; |
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326 | gMSAWave[16]=e2; |
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327 | ix=4; |
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328 | ir = sqfun(ix,ir); |
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329 | gMSAWave[14]=gMSAWave[15]; |
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330 | e2=gMSAWave[16]; |
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331 | ir=ii; |
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332 | if ((ig!=1) || (gMSAWave[10]>=gMSAWave[4])) { |
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333 | return ir; |
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334 | } |
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335 | } |
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336 | gMSAWave[15]=gMSAWave[14]; |
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337 | gMSAWave[16]=gMSAWave[4]; |
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338 | ix=3; |
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339 | ir = sqfun(ix,ir); |
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340 | gMSAWave[14]=gMSAWave[15]; |
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341 | gMSAWave[4]=gMSAWave[16]; |
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342 | if ((ir>=0) && (gMSAWave[14]<0.0)) { |
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343 | ir=-3; |
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344 | } |
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345 | return ir; |
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346 | } |
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347 | |
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348 | |
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349 | int |
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350 | sqfun(int ix, int ir) |
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351 | { |
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352 | double acc=1.0e-6; |
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353 | double reta,eta2,eta21,eta22,eta3,eta32,eta2d,eta2d2,eta3d,eta6d,e12,e24,rgek; |
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354 | double rak,ak1,ak2,dak,dak2,dak4,d,d2,dd2,dd4,dd45,ex1,ex2,sk,ck,ckma,skma; |
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355 | double al1,al2,al3,al4,al5,al6,be1,be2,be3,vu1,vu2,vu3,vu4,vu5,ph1,ph2,ta1,ta2,ta3,ta4,ta5; |
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356 | double a1,a2,a3,b1,b2,b3,v1,v2,v3,p1,p2,p3,pp,pp1,pp2,p1p2,t1,t2,t3,um1,um2,um3,um4,um5,um6; |
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357 | double w0,w1,w2,w3,w4,w12,w13,w14,w15,w16,w24,w25,w26,w32,w34,w3425,w35,w3526,w36,w46,w56; |
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358 | double fa,fap,ca,e24g,pwk,qpw,pg,del,fun,fund,g24; |
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359 | int ii,ibig,itm=40; |
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360 | // WAVE gMSAWave = $"root:HayPenMSA:gMSAWave" |
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361 | a2=0; |
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362 | a3=0; |
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363 | b2=0; |
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364 | b3=0; |
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365 | v2=0; |
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366 | v3=0; |
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367 | p2=0; |
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368 | p3=0; |
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369 | |
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370 | // CALCULATE CONSTANTS; NOTATION IS HAYTER PENFOLD (1981) |
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371 | |
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372 | reta = gMSAWave[16]; |
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373 | eta2 = reta*reta; |
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374 | eta3 = eta2*reta; |
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375 | e12 = 12.0*reta; |
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376 | e24 = e12+e12; |
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377 | gMSAWave[13] = pow( (gMSAWave[4]/gMSAWave[16]),(1.0/3.0)); |
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378 | gMSAWave[12]=gMSAWave[6]/gMSAWave[13]; |
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379 | ibig=0; |
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380 | if (( gMSAWave[12]>15.0) && (ix==1)) { |
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381 | ibig=1; |
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382 | } |
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383 | |
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384 | gMSAWave[11] = gMSAWave[5]*gMSAWave[13]*exp(gMSAWave[6]- gMSAWave[12]); |
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385 | rgek = gMSAWave[11]; |
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386 | rak = gMSAWave[12]; |
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387 | ak2 = rak*rak; |
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388 | ak1 = 1.0+rak; |
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389 | dak2 = 1.0/ak2; |
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390 | dak4 = dak2*dak2; |
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391 | d = 1.0-reta; |
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392 | d2 = d*d; |
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393 | dak = d/rak; |
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394 | dd2 = 1.0/d2; |
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395 | dd4 = dd2*dd2; |
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396 | dd45 = dd4*2.0e-1; |
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397 | eta3d=3.0*reta; |
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398 | eta6d = eta3d+eta3d; |
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399 | eta32 = eta3+ eta3; |
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400 | eta2d = reta+2.0; |
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401 | eta2d2 = eta2d*eta2d; |
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402 | eta21 = 2.0*reta+1.0; |
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403 | eta22 = eta21*eta21; |
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404 | |
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405 | // ALPHA(I) |
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406 | |
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407 | al1 = -eta21*dak; |
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408 | al2 = (14.0*eta2-4.0*reta-1.0)*dak2; |
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409 | al3 = 36.0*eta2*dak4; |
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410 | |
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411 | // BETA(I) |
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412 | |
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413 | be1 = -(eta2+7.0*reta+1.0)*dak; |
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414 | be2 = 9.0*reta*(eta2+4.0*reta-2.0)*dak2; |
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415 | be3 = 12.0*reta*(2.0*eta2+8.0*reta-1.0)*dak4; |
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416 | |
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417 | // NU(I) |
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418 | |
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419 | vu1 = -(eta3+3.0*eta2+45.0*reta+5.0)*dak; |
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420 | vu2 = (eta32+3.0*eta2+42.0*reta-2.0e1)*dak2; |
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421 | vu3 = (eta32+3.0e1*reta-5.0)*dak4; |
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422 | vu4 = vu1+e24*rak*vu3; |
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423 | vu5 = eta6d*(vu2+4.0*vu3); |
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424 | |
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425 | // PHI(I) |
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426 | |
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427 | ph1 = eta6d/rak; |
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428 | ph2 = d-e12*dak2; |
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429 | |
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430 | // TAU(I) |
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431 | |
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432 | ta1 = (reta+5.0)/(5.0*rak); |
---|
433 | ta2 = eta2d*dak2; |
---|
434 | ta3 = -e12*rgek*(ta1+ta2); |
---|
435 | ta4 = eta3d*ak2*(ta1*ta1-ta2*ta2); |
---|
436 | ta5 = eta3d*(reta+8.0)*1.0e-1-2.0*eta22*dak2; |
---|
437 | |
---|
438 | // double PRECISION SINH(K), COSH(K) |
---|
439 | |
---|
440 | ex1 = exp(rak); |
---|
441 | ex2 = 0.0; |
---|
442 | if ( gMSAWave[12]<20.0) { |
---|
443 | ex2=exp(-rak); |
---|
444 | } |
---|
445 | sk=0.5*(ex1-ex2); |
---|
446 | ck = 0.5*(ex1+ex2); |
---|
447 | ckma = ck-1.0-rak*sk; |
---|
448 | skma = sk-rak*ck; |
---|
449 | |
---|
450 | // a(I) |
---|
451 | |
---|
452 | a1 = (e24*rgek*(al1+al2+ak1*al3)-eta22)*dd4; |
---|
453 | if (ibig==0) { |
---|
454 | a2 = e24*(al3*skma+al2*sk-al1*ck)*dd4; |
---|
455 | a3 = e24*(eta22*dak2-0.5*d2+al3*ckma-al1*sk+al2*ck)*dd4; |
---|
456 | } |
---|
457 | |
---|
458 | // b(I) |
---|
459 | |
---|
460 | b1 = (1.5*reta*eta2d2-e12*rgek*(be1+be2+ak1*be3))*dd4; |
---|
461 | if (ibig==0) { |
---|
462 | b2 = e12*(-be3*skma-be2*sk+be1*ck)*dd4; |
---|
463 | b3 = e12*(0.5*d2*eta2d-eta3d*eta2d2*dak2-be3*ckma+be1*sk-be2*ck)*dd4; |
---|
464 | } |
---|
465 | |
---|
466 | // V(I) |
---|
467 | |
---|
468 | v1 = (eta21*(eta2-2.0*reta+1.0e1)*2.5e-1-rgek*(vu4+vu5))*dd45; |
---|
469 | if (ibig==0) { |
---|
470 | v2 = (vu4*ck-vu5*sk)*dd45; |
---|
471 | v3 = ((eta3-6.0*eta2+5.0)*d-eta6d*(2.0*eta3-3.0*eta2+18.0*reta+1.0e1)*dak2+e24*vu3+vu4*sk-vu5*ck)*dd45; |
---|
472 | } |
---|
473 | |
---|
474 | |
---|
475 | // P(I) |
---|
476 | |
---|
477 | pp1 = ph1*ph1; |
---|
478 | pp2 = ph2*ph2; |
---|
479 | pp = pp1+pp2; |
---|
480 | p1p2 = ph1*ph2*2.0; |
---|
481 | p1 = (rgek*(pp1+pp2-p1p2)-0.5*eta2d)*dd2; |
---|
482 | if (ibig==0) { |
---|
483 | p2 = (pp*sk+p1p2*ck)*dd2; |
---|
484 | p3 = (pp*ck+p1p2*sk+pp1-pp2)*dd2; |
---|
485 | } |
---|
486 | |
---|
487 | // T(I) |
---|
488 | |
---|
489 | t1 = ta3+ta4*a1+ta5*b1; |
---|
490 | if (ibig!=0) { |
---|
491 | |
---|
492 | // VERY LARGE SCREENING: ASYMPTOTIC SOLUTION |
---|
493 | |
---|
494 | v3 = ((eta3-6.0*eta2+5.0)*d-eta6d*(2.0*eta3-3.0*eta2+18.0*reta+1.0e1)*dak2+e24*vu3)*dd45; |
---|
495 | t3 = ta4*a3+ta5*b3+e12*ta2 - 4.0e-1*reta*(reta+1.0e1)-1.0; |
---|
496 | p3 = (pp1-pp2)*dd2; |
---|
497 | b3 = e12*(0.5*d2*eta2d-eta3d*eta2d2*dak2+be3)*dd4; |
---|
498 | a3 = e24*(eta22*dak2-0.5*d2-al3)*dd4; |
---|
499 | um6 = t3*a3-e12*v3*v3; |
---|
500 | um5 = t1*a3+a1*t3-e24*v1*v3; |
---|
501 | um4 = t1*a1-e12*v1*v1; |
---|
502 | al6 = e12*p3*p3; |
---|
503 | al5 = e24*p1*p3-b3-b3-ak2; |
---|
504 | al4 = e12*p1*p1-b1-b1; |
---|
505 | w56 = um5*al6-al5*um6; |
---|
506 | w46 = um4*al6-al4*um6; |
---|
507 | fa = -w46/w56; |
---|
508 | ca = -fa; |
---|
509 | gMSAWave[3] = fa; |
---|
510 | gMSAWave[2] = ca; |
---|
511 | gMSAWave[1] = b1+b3*fa; |
---|
512 | gMSAWave[0] = a1+a3*fa; |
---|
513 | gMSAWave[8] = v1+v3*fa; |
---|
514 | gMSAWave[14] = -(p1+p3*fa); |
---|
515 | gMSAWave[15] = gMSAWave[14]; |
---|
516 | if (fabs(gMSAWave[15])<1.0e-3) { |
---|
517 | gMSAWave[15] = 0.0; |
---|
518 | } |
---|
519 | gMSAWave[10] = gMSAWave[16]; |
---|
520 | |
---|
521 | } else { |
---|
522 | |
---|
523 | t2 = ta4*a2+ta5*b2+e12*(ta1*ck-ta2*sk); |
---|
524 | t3 = ta4*a3+ta5*b3+e12*(ta1*sk-ta2*(ck-1.0))-4.0e-1*reta*(reta+1.0e1)-1.0; |
---|
525 | |
---|
526 | // MU(i) |
---|
527 | |
---|
528 | um1 = t2*a2-e12*v2*v2; |
---|
529 | um2 = t1*a2+t2*a1-e24*v1*v2; |
---|
530 | um3 = t2*a3+t3*a2-e24*v2*v3; |
---|
531 | um4 = t1*a1-e12*v1*v1; |
---|
532 | um5 = t1*a3+t3*a1-e24*v1*v3; |
---|
533 | um6 = t3*a3-e12*v3*v3; |
---|
534 | |
---|
535 | // GILLAN CONDITION ? |
---|
536 | // |
---|
537 | // YES - G(X=1+) = 0 |
---|
538 | // |
---|
539 | // COEFFICIENTS AND FUNCTION VALUE |
---|
540 | // |
---|
541 | if ((ix==1) || (ix==3)) { |
---|
542 | |
---|
543 | // NO - CALCULATE REMAINING COEFFICIENTS. |
---|
544 | |
---|
545 | // LAMBDA(I) |
---|
546 | |
---|
547 | al1 = e12*p2*p2; |
---|
548 | al2 = e24*p1*p2-b2-b2; |
---|
549 | al3 = e24*p2*p3; |
---|
550 | al4 = e12*p1*p1-b1-b1; |
---|
551 | al5 = e24*p1*p3-b3-b3-ak2; |
---|
552 | al6 = e12*p3*p3; |
---|
553 | |
---|
554 | // OMEGA(I) |
---|
555 | |
---|
556 | w16 = um1*al6-al1*um6; |
---|
557 | w15 = um1*al5-al1*um5; |
---|
558 | w14 = um1*al4-al1*um4; |
---|
559 | w13 = um1*al3-al1*um3; |
---|
560 | w12 = um1*al2-al1*um2; |
---|
561 | |
---|
562 | w26 = um2*al6-al2*um6; |
---|
563 | w25 = um2*al5-al2*um5; |
---|
564 | w24 = um2*al4-al2*um4; |
---|
565 | |
---|
566 | w36 = um3*al6-al3*um6; |
---|
567 | w35 = um3*al5-al3*um5; |
---|
568 | w34 = um3*al4-al3*um4; |
---|
569 | w32 = um3*al2-al3*um2; |
---|
570 | // |
---|
571 | w46 = um4*al6-al4*um6; |
---|
572 | w56 = um5*al6-al5*um6; |
---|
573 | w3526 = w35+w26; |
---|
574 | w3425 = w34+w25; |
---|
575 | |
---|
576 | // QUARTIC COEFFICIENTS |
---|
577 | |
---|
578 | w4 = w16*w16-w13*w36; |
---|
579 | w3 = 2.0*w16*w15-w13*w3526-w12*w36; |
---|
580 | w2 = w15*w15+2.0*w16*w14-w13*w3425-w12*w3526; |
---|
581 | w1 = 2.0*w15*w14-w13*w24-w12*w3425; |
---|
582 | w0 = w14*w14-w12*w24; |
---|
583 | |
---|
584 | // ESTIMATE THE STARTING VALUE OF f |
---|
585 | |
---|
586 | if (ix==1) { |
---|
587 | // LARGE K |
---|
588 | fap = (w14-w34-w46)/(w12-w15+w35-w26+w56-w32); |
---|
589 | } else { |
---|
590 | // ASSUME NOT TOO FAR FROM GILLAN CONDITION. |
---|
591 | // IF BOTH RGEK AND RAK ARE SMALL, USE P-W ESTIMATE. |
---|
592 | gMSAWave[14]=0.5*eta2d*dd2*exp(-rgek); |
---|
593 | if (( gMSAWave[11]<=2.0) && ( gMSAWave[11]>=0.0) && ( gMSAWave[12]<=1.0)) { |
---|
594 | e24g = e24*rgek*exp(rak); |
---|
595 | pwk = sqrt(e24g); |
---|
596 | qpw = (1.0-sqrt(1.0+2.0*d2*d*pwk/eta22))*eta21/d; |
---|
597 | gMSAWave[14] = -qpw*qpw/e24+0.5*eta2d*dd2; |
---|
598 | } |
---|
599 | pg = p1+gMSAWave[14]; |
---|
600 | ca = ak2*pg+2.0*(b3*pg-b1*p3)+e12*gMSAWave[14]*gMSAWave[14]*p3; |
---|
601 | ca = -ca/(ak2*p2+2.0*(b3*p2-b2*p3)); |
---|
602 | fap = -(pg+p2*ca)/p3; |
---|
603 | } |
---|
604 | |
---|
605 | // AND REFINE IT ACCORDING TO NEWTON |
---|
606 | ii=0; |
---|
607 | do { |
---|
608 | ii = ii+1; |
---|
609 | if (ii>itm) { |
---|
610 | // FAILED TO CONVERGE IN ITM ITERATIONS |
---|
611 | ir=-2; |
---|
612 | return (ir); |
---|
613 | } |
---|
614 | fa = fap; |
---|
615 | fun = w0+(w1+(w2+(w3+w4*fa)*fa)*fa)*fa; |
---|
616 | fund = w1+(2.0*w2+(3.0*w3+4.0*w4*fa)*fa)*fa; |
---|
617 | fap = fa-fun/fund; |
---|
618 | del=fabs((fap-fa)/fa); |
---|
619 | } while (del>acc); |
---|
620 | |
---|
621 | ir = ir+ii; |
---|
622 | fa = fap; |
---|
623 | ca = -(w16*fa*fa+w15*fa+w14)/(w13*fa+w12); |
---|
624 | gMSAWave[14] = -(p1+p2*ca+p3*fa); |
---|
625 | gMSAWave[15] = gMSAWave[14]; |
---|
626 | if (fabs(gMSAWave[15])<1.0e-3) { |
---|
627 | gMSAWave[15] = 0.0; |
---|
628 | } |
---|
629 | gMSAWave[10] = gMSAWave[16]; |
---|
630 | } else { |
---|
631 | ca = ak2*p1+2.0*(b3*p1-b1*p3); |
---|
632 | ca = -ca/(ak2*p2+2.0*(b3*p2-b2*p3)); |
---|
633 | fa = -(p1+p2*ca)/p3; |
---|
634 | if (ix==2) { |
---|
635 | gMSAWave[15] = um1*ca*ca+(um2+um3*fa)*ca+um4+um5*fa+um6*fa*fa; |
---|
636 | } |
---|
637 | if (ix==4) { |
---|
638 | gMSAWave[15] = -(p1+p2*ca+p3*fa); |
---|
639 | } |
---|
640 | } |
---|
641 | gMSAWave[3] = fa; |
---|
642 | gMSAWave[2] = ca; |
---|
643 | gMSAWave[1] = b1+b2*ca+b3*fa; |
---|
644 | gMSAWave[0] = a1+a2*ca+a3*fa; |
---|
645 | gMSAWave[8] = (v1+v2*ca+v3*fa)/gMSAWave[0]; |
---|
646 | } |
---|
647 | g24 = e24*rgek*ex1; |
---|
648 | gMSAWave[7] = (rak*ak2*ca-g24)/(ak2*g24); |
---|
649 | return (ir); |
---|
650 | } |
---|
651 | |
---|
652 | // called as DiamCyl(hcyl,rcyl) |
---|
653 | double |
---|
654 | DiamCyl(double hcyl, double rcyl) |
---|
655 | { |
---|
656 | |
---|
657 | double diam,a,b,t1,t2,ddd; |
---|
658 | double pi; |
---|
659 | |
---|
660 | pi = 4.0*atan(1.0); |
---|
661 | if (rcyl == 0 || hcyl == 0) { |
---|
662 | return 0.0; |
---|
663 | } |
---|
664 | a = rcyl; |
---|
665 | b = hcyl/2.0; |
---|
666 | t1 = a*a*2.0*b/2.0; |
---|
667 | t2 = 1.0 + (b/a)*(1.0+a/b/2.0)*(1.0+pi*a/b/2.0); |
---|
668 | ddd = 3.0*t1*t2; |
---|
669 | diam = pow(ddd,(1.0/3.0)); |
---|
670 | |
---|
671 | return(diam); |
---|
672 | } |
---|
673 | |
---|
674 | //prolate OR oblate ellipsoids |
---|
675 | //aa is the axis of rotation |
---|
676 | //if aa>bb, then PROLATE |
---|
677 | //if aa<bb, then OBLATE |
---|
678 | // A. Isihara, J. Chem. Phys. 18, 1446 (1950) |
---|
679 | //returns DIAMETER |
---|
680 | // called as DiamEllip(aa,bb) |
---|
681 | double |
---|
682 | DiamEllip(double aa, double bb) |
---|
683 | { |
---|
684 | |
---|
685 | double ee,e1,bd,b1,bL,b2,del,ddd,diam; |
---|
686 | |
---|
687 | if (aa == 0 || bb == 0) { |
---|
688 | return 0.0; |
---|
689 | } |
---|
690 | if (aa == bb) { |
---|
691 | return 2.0*aa; |
---|
692 | } |
---|
693 | if(aa>bb) { |
---|
694 | ee = (aa*aa - bb*bb)/(aa*aa); |
---|
695 | }else{ |
---|
696 | ee = (bb*bb - aa*aa)/(bb*bb); |
---|
697 | } |
---|
698 | |
---|
699 | bd = 1.0-ee; |
---|
700 | e1 = sqrt(ee); |
---|
701 | b1 = 1.0 + asin(e1)/(e1*sqrt(bd)); |
---|
702 | bL = (1.0+e1)/(1.0-e1); |
---|
703 | b2 = 1.0 + bd/2/e1*log(bL); |
---|
704 | del = 0.75*b1*b2; |
---|
705 | |
---|
706 | ddd = 2.0*(del+1.0)*aa*bb*bb; //volume is always calculated correctly |
---|
707 | diam = pow(ddd,(1.0/3.0)); |
---|
708 | |
---|
709 | return(diam); |
---|
710 | } |
---|
711 | |
---|
712 | double |
---|
713 | sqhcal(double qq) |
---|
714 | { |
---|
715 | double SofQ,etaz,akz,gekz,e24,x1,x2,ck,sk,ak2,qk,q2k,qk2,qk3,qqk,sink,cosk,asink,qcosk,aqk,inter; |
---|
716 | // WAVE gMSAWave = $"root:HayPenMSA:gMSAWave" |
---|
717 | |
---|
718 | etaz = gMSAWave[10]; |
---|
719 | akz = gMSAWave[12]; |
---|
720 | gekz = gMSAWave[11]; |
---|
721 | e24 = 24.0*etaz; |
---|
722 | x1 = exp(akz); |
---|
723 | x2 = 0.0; |
---|
724 | if ( gMSAWave[12]<20.0) { |
---|
725 | x2 = exp(-akz); |
---|
726 | } |
---|
727 | ck = 0.5*(x1+x2); |
---|
728 | sk = 0.5*(x1-x2); |
---|
729 | ak2 = akz*akz; |
---|
730 | |
---|
731 | if (qq<=0.0) { |
---|
732 | SofQ = -1.0/gMSAWave[0]; |
---|
733 | } else { |
---|
734 | qk = qq/gMSAWave[13]; |
---|
735 | q2k = qk*qk; |
---|
736 | qk2 = 1.0/q2k; |
---|
737 | qk3 = qk2/qk; |
---|
738 | qqk = 1.0/(qk*(q2k+ak2)); |
---|
739 | sink = sin(qk); |
---|
740 | cosk = cos(qk); |
---|
741 | asink = akz*sink; |
---|
742 | qcosk = qk*cosk; |
---|
743 | aqk = gMSAWave[0]*(sink-qcosk); |
---|
744 | aqk=aqk+gMSAWave[1]*((2.0*qk2-1.0)*qcosk+2.0*sink-2.0/qk); |
---|
745 | inter=24.0*qk3+4.0*(1.0-6.0*qk2)*sink; |
---|
746 | aqk=(aqk+0.5*etaz*gMSAWave[0]*(inter-(1.0-12.0*qk2+24.0*qk2*qk2)*qcosk))*qk3; |
---|
747 | aqk=aqk +gMSAWave[2]*(ck*asink-sk*qcosk)*qqk; |
---|
748 | aqk=aqk +gMSAWave[3]*(sk*asink-qk*(ck*cosk-1.0))*qqk; |
---|
749 | aqk=aqk +gMSAWave[3]*(cosk-1.0)*qk2; |
---|
750 | aqk=aqk -gekz*(asink+qcosk)*qqk; |
---|
751 | SofQ = 1.0/(1.0-e24*aqk); |
---|
752 | } |
---|
753 | return (SofQ); |
---|
754 | } |
---|
755 | |
---|
756 | ///////////end of XOP |
---|
757 | |
---|
758 | |
---|