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root/group/trunk/OOPSE/libmdtools/Thermo.cpp
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Comparing trunk/OOPSE/libmdtools/Thermo.cpp (file contents):
Revision 483 by gezelter, Wed Apr 9 04:06:43 2003 UTC vs.
Revision 572 by mmeineke, Wed Jul 2 21:26:55 2003 UTC

# Line 132 | Line 132 | double Thermo::getTemperature(){
132    
133    temperature = ( 2.0 * this->getKinetic() ) / ((double)entry_plug->ndf * kb );
134    return temperature;
135 + }
136 +
137 + double Thermo::getEnthalpy() {
138 +
139 +  const double e_convert = 4.184E-4; // convert kcal/mol -> (amu A^2)/fs^2
140 +  double u, p, v;
141 +  double press[9];
142 +
143 +  u = this->getTotalE();
144 +
145 +  this->getPressureTensor(press);
146 +  p = (press[0] + press[4] + press[8]) / 3.0;
147 +
148 +  v = this->getVolume();
149 +
150 +  return (u + (p*v)/e_convert);
151   }
152  
153 + double Thermo::getVolume() {
154 +  return entry_plug->boxVol;
155 + }
156 +
157   double Thermo::getPressure() {
158    // returns the pressure in units of atm
159    // Relies on the calculation of the full molecular pressure tensor
# Line 161 | Line 181 | void Thermo::getPressureTensor(double press[9]){
181    double vcom[3];
182    double p_local[9], p_global[9];
183    double theBox[3];
184 <  double* tau;
184 >  //double* tau;
185    int i, nMols;
186    Molecule* molecules;
187  
188    nMols = entry_plug->n_mol;
189    molecules = entry_plug->molecules;
190 <  tau = entry_plug->tau;
190 >  //tau = entry_plug->tau;
191  
192    // use velocities of molecular centers of mass and molecular masses:
193    for (i=0; i < 9; i++) {    
# Line 199 | Line 219 | void Thermo::getPressureTensor(double press[9]){
219    }
220   #endif // is_mpi
221  
222 <  entry_plug->getBox(theBox);
222 >  volume = entry_plug->boxVol;
223  
204  volume = theBox[0] * theBox[1] * theBox[2];
205
224    for(i=0; i<9; i++) {
225 <    press[i] = (p_global[i] - tau[i]*e_convert) / volume;
225 >    press[i] = (p_global[i] - entry_plug->tau[i]*e_convert) / volume;
226    }
227   }
228  

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