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mmeineke |
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#include <cmath> |
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#include <iostream> |
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using namespace std; |
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#ifdef IS_MPI |
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#include <mpi.h> |
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#endif //is_mpi |
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#include "Thermo.hpp" |
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#include "SRI.hpp" |
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#include "Integrator.hpp" |
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chuckv |
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#include "simError.h" |
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mmeineke |
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#ifdef IS_MPI |
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#define __C |
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mmeineke |
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#include "mpiSimulation.hpp" |
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#endif // is_mpi |
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mmeineke |
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mmeineke |
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Thermo::Thermo( SimInfo* the_info ) { |
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info = the_info; |
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tim |
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int baseSeed = the_info->getSeed(); |
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mmeineke |
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gaussStream = new gaussianSPRNG( baseSeed ); |
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} |
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Thermo::~Thermo(){ |
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delete gaussStream; |
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} |
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double Thermo::getKinetic(){ |
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const double e_convert = 4.184E-4; // convert kcal/mol -> (amu A^2)/fs^2 |
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double kinetic; |
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double amass; |
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double aVel[3], aJ[3], I[3][3]; |
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int j, kl; |
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mmeineke |
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DirectionalAtom *dAtom; |
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int n_atoms; |
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double kinetic_global; |
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Atom** atoms; |
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mmeineke |
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n_atoms = info->n_atoms; |
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atoms = info->atoms; |
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mmeineke |
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kinetic = 0.0; |
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kinetic_global = 0.0; |
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for( kl=0; kl < n_atoms; kl++ ){ |
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gezelter |
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atoms[kl]->getVel(aVel); |
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amass = atoms[kl]->getMass(); |
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for (j=0; j < 3; j++) |
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kinetic += amass * aVel[j] * aVel[j]; |
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mmeineke |
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if( atoms[kl]->isDirectional() ){ |
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dAtom = (DirectionalAtom *)atoms[kl]; |
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dAtom->getJ( aJ ); |
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dAtom->getI( I ); |
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mmeineke |
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gezelter |
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for (j=0; j<3; j++) |
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kinetic += aJ[j]*aJ[j] / I[j][j]; |
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mmeineke |
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} |
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} |
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#ifdef IS_MPI |
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MPI_Allreduce(&kinetic,&kinetic_global,1,MPI_DOUBLE, |
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MPI_SUM, MPI_COMM_WORLD); |
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mmeineke |
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kinetic = kinetic_global; |
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#endif //is_mpi |
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kinetic = kinetic * 0.5 / e_convert; |
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return kinetic; |
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} |
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double Thermo::getPotential(){ |
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chuckv |
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double potential_local; |
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mmeineke |
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double potential; |
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int el, nSRI; |
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mmeineke |
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Molecule* molecules; |
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mmeineke |
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|
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mmeineke |
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molecules = info->molecules; |
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nSRI = info->n_SRI; |
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mmeineke |
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chuckv |
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potential_local = 0.0; |
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chuckv |
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potential = 0.0; |
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mmeineke |
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potential_local += info->lrPot; |
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mmeineke |
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|
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mmeineke |
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for( el=0; el<info->n_mol; el++ ){ |
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mmeineke |
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potential_local += molecules[el].getPotential(); |
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} |
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// Get total potential for entire system from MPI. |
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#ifdef IS_MPI |
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MPI_Allreduce(&potential_local,&potential,1,MPI_DOUBLE, |
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MPI_SUM, MPI_COMM_WORLD); |
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#else |
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potential = potential_local; |
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mmeineke |
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#endif // is_mpi |
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#ifdef IS_MPI |
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/* |
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std::cerr << "node " << worldRank << ": after pot = " << potential << "\n"; |
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*/ |
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#endif |
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mmeineke |
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return potential; |
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} |
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double Thermo::getTotalE(){ |
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double total; |
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total = this->getKinetic() + this->getPotential(); |
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return total; |
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} |
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gezelter |
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double Thermo::getTemperature(){ |
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tim |
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const double kb = 1.9872156E-3; // boltzman's constant in kcal/(mol K) |
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gezelter |
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double temperature; |
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mmeineke |
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temperature = ( 2.0 * this->getKinetic() ) / ((double)info->ndf * kb ); |
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mmeineke |
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return temperature; |
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} |
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gezelter |
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double Thermo::getEnthalpy() { |
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const double e_convert = 4.184E-4; // convert kcal/mol -> (amu A^2)/fs^2 |
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double u, p, v; |
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gezelter |
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double press[3][3]; |
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gezelter |
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u = this->getTotalE(); |
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this->getPressureTensor(press); |
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gezelter |
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p = (press[0][0] + press[1][1] + press[2][2]) / 3.0; |
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gezelter |
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v = this->getVolume(); |
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return (u + (p*v)/e_convert); |
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} |
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double Thermo::getVolume() { |
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gezelter |
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mmeineke |
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return info->boxVol; |
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gezelter |
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} |
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gezelter |
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double Thermo::getPressure() { |
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gezelter |
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gezelter |
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// Relies on the calculation of the full molecular pressure tensor |
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const double p_convert = 1.63882576e8; |
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gezelter |
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double press[3][3]; |
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gezelter |
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double pressure; |
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this->getPressureTensor(press); |
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gezelter |
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pressure = p_convert * (press[0][0] + press[1][1] + press[2][2]) / 3.0; |
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gezelter |
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return pressure; |
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} |
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mmeineke |
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double Thermo::getPressureX() { |
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gezelter |
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mmeineke |
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// Relies on the calculation of the full molecular pressure tensor |
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const double p_convert = 1.63882576e8; |
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double press[3][3]; |
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double pressureX; |
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this->getPressureTensor(press); |
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pressureX = p_convert * press[0][0]; |
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return pressureX; |
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} |
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double Thermo::getPressureY() { |
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// Relies on the calculation of the full molecular pressure tensor |
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const double p_convert = 1.63882576e8; |
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double press[3][3]; |
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double pressureY; |
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this->getPressureTensor(press); |
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pressureY = p_convert * press[1][1]; |
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return pressureY; |
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} |
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double Thermo::getPressureZ() { |
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// Relies on the calculation of the full molecular pressure tensor |
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const double p_convert = 1.63882576e8; |
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double press[3][3]; |
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double pressureZ; |
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this->getPressureTensor(press); |
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pressureZ = p_convert * press[2][2]; |
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return pressureZ; |
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} |
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gezelter |
588 |
void Thermo::getPressureTensor(double press[3][3]){ |
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gezelter |
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// returns pressure tensor in units amu*fs^-2*Ang^-1 |
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gezelter |
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// routine derived via viral theorem description in: |
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// Paci, E. and Marchi, M. J.Phys.Chem. 1996, 100, 4314-4322 |
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mmeineke |
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gezelter |
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const double e_convert = 4.184e-4; |
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gezelter |
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double molmass, volume; |
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gezelter |
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double vcom[3]; |
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gezelter |
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double p_local[9], p_global[9]; |
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mmeineke |
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int i, j, k, nMols; |
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gezelter |
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Molecule* molecules; |
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mmeineke |
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nMols = info->n_mol; |
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molecules = info->molecules; |
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//tau = info->tau; |
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gezelter |
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// use velocities of molecular centers of mass and molecular masses: |
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gezelter |
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for (i=0; i < 9; i++) { |
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p_local[i] = 0.0; |
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p_global[i] = 0.0; |
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} |
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gezelter |
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gezelter |
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for (i=0; i < nMols; i++) { |
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gezelter |
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molmass = molecules[i].getCOMvel(vcom); |
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gezelter |
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p_local[0] += molmass * (vcom[0] * vcom[0]); |
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p_local[1] += molmass * (vcom[0] * vcom[1]); |
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p_local[2] += molmass * (vcom[0] * vcom[2]); |
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p_local[3] += molmass * (vcom[1] * vcom[0]); |
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p_local[4] += molmass * (vcom[1] * vcom[1]); |
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p_local[5] += molmass * (vcom[1] * vcom[2]); |
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p_local[6] += molmass * (vcom[2] * vcom[0]); |
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p_local[7] += molmass * (vcom[2] * vcom[1]); |
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p_local[8] += molmass * (vcom[2] * vcom[2]); |
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gezelter |
468 |
} |
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// Get total for entire system from MPI. |
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chuckv |
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|
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gezelter |
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#ifdef IS_MPI |
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gezelter |
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MPI_Allreduce(p_local,p_global,9,MPI_DOUBLE, MPI_SUM, MPI_COMM_WORLD); |
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gezelter |
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#else |
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gezelter |
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for (i=0; i<9; i++) { |
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p_global[i] = p_local[i]; |
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} |
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gezelter |
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#endif // is_mpi |
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gezelter |
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volume = this->getVolume(); |
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gezelter |
468 |
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gezelter |
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for(i = 0; i < 3; i++) { |
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for (j = 0; j < 3; j++) { |
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k = 3*i + j; |
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mmeineke |
614 |
press[i][j] = (p_global[k] + info->tau[k]*e_convert) / volume; |
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gezelter |
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} |
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gezelter |
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} |
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mmeineke |
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} |
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void Thermo::velocitize() { |
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gezelter |
608 |
double aVel[3], aJ[3], I[3][3]; |
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int i, j, vr, vd; // velocity randomizer loop counters |
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chuckv |
403 |
double vdrift[3]; |
278 |
mmeineke |
377 |
double vbar; |
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const double kb = 8.31451e-7; // kb in amu, angstroms, fs, etc. |
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double av2; |
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double kebar; |
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int n_atoms; |
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Atom** atoms; |
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DirectionalAtom* dAtom; |
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double temperature; |
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int n_oriented; |
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int n_constraints; |
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mmeineke |
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atoms = info->atoms; |
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n_atoms = info->n_atoms; |
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temperature = info->target_temp; |
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n_oriented = info->n_oriented; |
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n_constraints = info->n_constraints; |
294 |
mmeineke |
377 |
|
295 |
tim |
763 |
kebar = kb * temperature * (double)info->ndfRaw / |
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( 2.0 * (double)info->ndf ); |
297 |
chuckv |
403 |
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mmeineke |
377 |
for(vr = 0; vr < n_atoms; vr++){ |
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// uses equipartition theory to solve for vbar in angstrom/fs |
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av2 = 2.0 * kebar / atoms[vr]->getMass(); |
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vbar = sqrt( av2 ); |
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gezelter |
444 |
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mmeineke |
377 |
// vbar = sqrt( 8.31451e-7 * temperature / atoms[vr]->getMass() ); |
306 |
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// picks random velocities from a gaussian distribution |
308 |
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// centered on vbar |
309 |
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310 |
gezelter |
608 |
for (j=0; j<3; j++) |
311 |
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aVel[j] = vbar * gaussStream->getGaussian(); |
312 |
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313 |
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atoms[vr]->setVel( aVel ); |
314 |
mmeineke |
377 |
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} |
316 |
chuckv |
401 |
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// Get the Center of Mass drift velocity. |
318 |
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319 |
chuckv |
403 |
getCOMVel(vdrift); |
320 |
mmeineke |
377 |
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// Corrects for the center of mass drift. |
322 |
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// sums all the momentum and divides by total mass. |
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for(vd = 0; vd < n_atoms; vd++){ |
325 |
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326 |
gezelter |
608 |
atoms[vd]->getVel(aVel); |
327 |
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328 |
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for (j=0; j < 3; j++) |
329 |
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aVel[j] -= vdrift[j]; |
330 |
chuckv |
401 |
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331 |
gezelter |
608 |
atoms[vd]->setVel( aVel ); |
332 |
mmeineke |
377 |
} |
333 |
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if( n_oriented ){ |
334 |
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335 |
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for( i=0; i<n_atoms; i++ ){ |
336 |
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337 |
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if( atoms[i]->isDirectional() ){ |
338 |
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339 |
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dAtom = (DirectionalAtom *)atoms[i]; |
340 |
gezelter |
608 |
dAtom->getI( I ); |
341 |
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342 |
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for (j = 0 ; j < 3; j++) { |
343 |
mmeineke |
377 |
|
344 |
gezelter |
608 |
vbar = sqrt( 2.0 * kebar * I[j][j] ); |
345 |
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aJ[j] = vbar * gaussStream->getGaussian(); |
346 |
mmeineke |
377 |
|
347 |
gezelter |
608 |
} |
348 |
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349 |
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dAtom->setJ( aJ ); |
350 |
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351 |
mmeineke |
377 |
} |
352 |
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} |
353 |
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} |
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} |
355 |
chuckv |
401 |
|
356 |
chuckv |
403 |
void Thermo::getCOMVel(double vdrift[3]){ |
357 |
chuckv |
401 |
|
358 |
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double mtot, mtot_local; |
359 |
gezelter |
608 |
double aVel[3], amass; |
360 |
chuckv |
401 |
double vdrift_local[3]; |
361 |
gezelter |
608 |
int vd, n_atoms, j; |
362 |
chuckv |
401 |
Atom** atoms; |
363 |
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364 |
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// We are very careless here with the distinction between n_atoms and n_local |
365 |
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// We should really fix this before someone pokes an eye out. |
366 |
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367 |
mmeineke |
614 |
n_atoms = info->n_atoms; |
368 |
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atoms = info->atoms; |
369 |
chuckv |
401 |
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370 |
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mtot_local = 0.0; |
371 |
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vdrift_local[0] = 0.0; |
372 |
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vdrift_local[1] = 0.0; |
373 |
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vdrift_local[2] = 0.0; |
374 |
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375 |
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for(vd = 0; vd < n_atoms; vd++){ |
376 |
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377 |
gezelter |
608 |
amass = atoms[vd]->getMass(); |
378 |
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atoms[vd]->getVel( aVel ); |
379 |
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380 |
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for(j = 0; j < 3; j++) |
381 |
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vdrift_local[j] += aVel[j] * amass; |
382 |
chuckv |
401 |
|
383 |
gezelter |
608 |
mtot_local += amass; |
384 |
chuckv |
401 |
} |
385 |
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386 |
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#ifdef IS_MPI |
387 |
mmeineke |
447 |
MPI_Allreduce(&mtot_local,&mtot,1,MPI_DOUBLE,MPI_SUM, MPI_COMM_WORLD); |
388 |
|
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MPI_Allreduce(vdrift_local,vdrift,3,MPI_DOUBLE,MPI_SUM, MPI_COMM_WORLD); |
389 |
chuckv |
401 |
#else |
390 |
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mtot = mtot_local; |
391 |
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for(vd = 0; vd < 3; vd++) { |
392 |
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vdrift[vd] = vdrift_local[vd]; |
393 |
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} |
394 |
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#endif |
395 |
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396 |
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for (vd = 0; vd < 3; vd++) { |
397 |
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vdrift[vd] = vdrift[vd] / mtot; |
398 |
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} |
399 |
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|
400 |
|
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} |
401 |
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|
402 |
tim |
763 |
void Thermo::getCOM(double COM[3]){ |
403 |
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|
404 |
|
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double mtot, mtot_local; |
405 |
|
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double aPos[3], amass; |
406 |
|
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double COM_local[3]; |
407 |
|
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int i, n_atoms, j; |
408 |
|
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Atom** atoms; |
409 |
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|
410 |
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// We are very careless here with the distinction between n_atoms and n_local |
411 |
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// We should really fix this before someone pokes an eye out. |
412 |
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413 |
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n_atoms = info->n_atoms; |
414 |
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atoms = info->atoms; |
415 |
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|
416 |
|
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mtot_local = 0.0; |
417 |
|
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COM_local[0] = 0.0; |
418 |
|
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COM_local[1] = 0.0; |
419 |
|
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COM_local[2] = 0.0; |
420 |
|
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|
421 |
|
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for(i = 0; i < n_atoms; i++){ |
422 |
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|
423 |
|
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amass = atoms[i]->getMass(); |
424 |
|
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atoms[i]->getPos( aPos ); |
425 |
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|
426 |
|
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for(j = 0; j < 3; j++) |
427 |
|
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COM_local[j] += aPos[j] * amass; |
428 |
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|
429 |
|
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mtot_local += amass; |
430 |
|
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} |
431 |
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|
432 |
|
|
#ifdef IS_MPI |
433 |
|
|
MPI_Allreduce(&mtot_local,&mtot,1,MPI_DOUBLE,MPI_SUM, MPI_COMM_WORLD); |
434 |
|
|
MPI_Allreduce(COM_local,COM,3,MPI_DOUBLE,MPI_SUM, MPI_COMM_WORLD); |
435 |
|
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#else |
436 |
|
|
mtot = mtot_local; |
437 |
|
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for(i = 0; i < 3; i++) { |
438 |
|
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COM[i] = COM_local[i]; |
439 |
|
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} |
440 |
|
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#endif |
441 |
|
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|
442 |
|
|
for (i = 0; i < 3; i++) { |
443 |
|
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COM[i] = COM[i] / mtot; |
444 |
|
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} |
445 |
|
|
} |