--- trunk/OOPSE/libmdtools/Thermo.cpp 2003/08/20 22:23:34 708 +++ trunk/OOPSE/libmdtools/Thermo.cpp 2004/05/24 21:03:30 1192 @@ -1,4 +1,4 @@ -#include +#include #include using namespace std; @@ -10,12 +10,17 @@ using namespace std; #include "SRI.hpp" #include "Integrator.hpp" #include "simError.h" +#include "MatVec3.h" #ifdef IS_MPI #define __C #include "mpiSimulation.hpp" #endif // is_mpi +inline double roundMe( double x ){ + return ( x >= 0 ) ? floor( x + 0.5 ) : ceil( x - 0.5 ); +} + Thermo::Thermo( SimInfo* the_info ) { info = the_info; int baseSeed = the_info->getSeed(); @@ -33,46 +38,43 @@ double Thermo::getKinetic(){ double kinetic; double amass; double aVel[3], aJ[3], I[3][3]; - int j, kl; + int i, j, k, kl; - DirectionalAtom *dAtom; - - int n_atoms; double kinetic_global; - Atom** atoms; - + vector integrableObjects = info->integrableObjects; - n_atoms = info->n_atoms; - atoms = info->atoms; - kinetic = 0.0; kinetic_global = 0.0; - for( kl=0; kl < n_atoms; kl++ ){ - - atoms[kl]->getVel(aVel); - amass = atoms[kl]->getMass(); - - for (j=0; j < 3; j++) - kinetic += amass * aVel[j] * aVel[j]; - if( atoms[kl]->isDirectional() ){ - - dAtom = (DirectionalAtom *)atoms[kl]; + for (kl=0; klgetVel(aVel); + amass = integrableObjects[kl]->getMass(); - dAtom->getJ( aJ ); - dAtom->getI( I ); - - for (j=0; j<3; j++) - kinetic += aJ[j]*aJ[j] / I[j][j]; - - } + for(j=0; j<3; j++) + kinetic += amass*aVel[j]*aVel[j]; + + if (integrableObjects[kl]->isDirectional()){ + + integrableObjects[kl]->getJ( aJ ); + integrableObjects[kl]->getI( I ); + + if (integrableObjects[kl]->isLinear()) { + i = integrableObjects[kl]->linearAxis(); + j = (i+1)%3; + k = (i+2)%3; + kinetic += aJ[j]*aJ[j]/I[j][j] + aJ[k]*aJ[k]/I[k][k]; + } else { + for (j=0; j<3; j++) + kinetic += aJ[j]*aJ[j] / I[j][j]; + } + } } #ifdef IS_MPI MPI_Allreduce(&kinetic,&kinetic_global,1,MPI_DOUBLE, MPI_SUM, MPI_COMM_WORLD); kinetic = kinetic_global; #endif //is_mpi - + kinetic = kinetic * 0.5 / e_convert; return kinetic; @@ -104,12 +106,6 @@ double Thermo::getPotential(){ potential = potential_local; #endif // is_mpi -#ifdef IS_MPI - /* - std::cerr << "node " << worldRank << ": after pot = " << potential << "\n"; - */ -#endif - return potential; } @@ -123,29 +119,13 @@ double Thermo::getTemperature(){ double Thermo::getTemperature(){ - const double kb = 1.9872179E-3; // boltzman's constant in kcal/(mol K) + const double kb = 1.9872156E-3; // boltzman's constant in kcal/(mol K) double temperature; - + temperature = ( 2.0 * this->getKinetic() ) / ((double)info->ndf * kb ); return temperature; } -double Thermo::getEnthalpy() { - - const double e_convert = 4.184E-4; // convert kcal/mol -> (amu A^2)/fs^2 - double u, p, v; - double press[3][3]; - - u = this->getTotalE(); - - this->getPressureTensor(press); - p = (press[0][0] + press[1][1] + press[2][2]) / 3.0; - - v = this->getVolume(); - - return (u + (p*v)/e_convert); -} - double Thermo::getVolume() { return info->boxVol; @@ -166,7 +146,52 @@ double Thermo::getPressure() { return pressure; } +double Thermo::getPressureX() { + // Relies on the calculation of the full molecular pressure tensor + + const double p_convert = 1.63882576e8; + double press[3][3]; + double pressureX; + + this->getPressureTensor(press); + + pressureX = p_convert * press[0][0]; + + return pressureX; +} + +double Thermo::getPressureY() { + + // Relies on the calculation of the full molecular pressure tensor + + const double p_convert = 1.63882576e8; + double press[3][3]; + double pressureY; + + this->getPressureTensor(press); + + pressureY = p_convert * press[1][1]; + + return pressureY; +} + +double Thermo::getPressureZ() { + + // Relies on the calculation of the full molecular pressure tensor + + const double p_convert = 1.63882576e8; + double press[3][3]; + double pressureZ; + + this->getPressureTensor(press); + + pressureZ = p_convert * press[2][2]; + + return pressureZ; +} + + void Thermo::getPressureTensor(double press[3][3]){ // returns pressure tensor in units amu*fs^-2*Ang^-1 // routine derived via viral theorem description in: @@ -175,7 +200,7 @@ void Thermo::getPressureTensor(double press[3][3]){ const double e_convert = 4.184e-4; double molmass, volume; - double vcom[3]; + double vcom[3], pcom[3], fcom[3], scaled[3]; double p_local[9], p_global[9]; int i, j, k, nMols; Molecule* molecules; @@ -190,9 +215,23 @@ void Thermo::getPressureTensor(double press[3][3]){ p_global[i] = 0.0; } - for (i=0; i < nMols; i++) { - molmass = molecules[i].getCOMvel(vcom); + for (i=0; i < info->integrableObjects.size(); i++) { + molmass = info->integrableObjects[i]->getMass(); + + info->integrableObjects[i]->getVel(vcom); + info->integrableObjects[i]->getPos(pcom); + info->integrableObjects[i]->getFrc(fcom); + + matVecMul3(info->HmatInv, pcom, scaled); + + for(j=0; j<3; j++) + scaled[j] -= roundMe(scaled[j]); + + // calc the wrapped real coordinates from the wrapped scaled coordinates + + matVecMul3(info->Hmat, scaled, pcom); + p_local[0] += molmass * (vcom[0] * vcom[0]); p_local[1] += molmass * (vcom[0] * vcom[1]); p_local[2] += molmass * (vcom[0] * vcom[2]); @@ -202,6 +241,7 @@ void Thermo::getPressureTensor(double press[3][3]){ p_local[6] += molmass * (vcom[2] * vcom[0]); p_local[7] += molmass * (vcom[2] * vcom[1]); p_local[8] += molmass * (vcom[2] * vcom[2]); + } // Get total for entire system from MPI. @@ -220,54 +260,71 @@ void Thermo::getPressureTensor(double press[3][3]){ for (j = 0; j < 3; j++) { k = 3*i + j; press[i][j] = (p_global[k] + info->tau[k]*e_convert) / volume; - } } } void Thermo::velocitize() { - double x,y; double aVel[3], aJ[3], I[3][3]; - int i, j, vr, vd; // velocity randomizer loop counters + int i, j, l, m, n, vr, vd; // velocity randomizer loop counters double vdrift[3]; double vbar; const double kb = 8.31451e-7; // kb in amu, angstroms, fs, etc. double av2; double kebar; - int n_atoms; - Atom** atoms; - DirectionalAtom* dAtom; double temperature; - int n_oriented; - int n_constraints; + int nobj; - atoms = info->atoms; - n_atoms = info->n_atoms; - temperature = info->target_temp; - n_oriented = info->n_oriented; - n_constraints = info->n_constraints; + nobj = info->integrableObjects.size(); - kebar = kb * temperature * (double)info->ndf / - ( 2.0 * (double)info->ndfRaw ); + temperature = info->target_temp; - for(vr = 0; vr < n_atoms; vr++){ + kebar = kb * temperature * (double)info->ndfRaw / + ( 2.0 * (double)info->ndf ); + + for(vr = 0; vr < nobj; vr++){ // uses equipartition theory to solve for vbar in angstrom/fs - av2 = 2.0 * kebar / atoms[vr]->getMass(); + av2 = 2.0 * kebar / info->integrableObjects[vr]->getMass(); vbar = sqrt( av2 ); - -// vbar = sqrt( 8.31451e-7 * temperature / atoms[vr]->getMass() ); - + // picks random velocities from a gaussian distribution // centered on vbar for (j=0; j<3; j++) aVel[j] = vbar * gaussStream->getGaussian(); - atoms[vr]->setVel( aVel ); + info->integrableObjects[vr]->setVel( aVel ); + + if(info->integrableObjects[vr]->isDirectional()){ + info->integrableObjects[vr]->getI( I ); + + if (info->integrableObjects[vr]->isLinear()) { + + l= info->integrableObjects[vr]->linearAxis(); + m = (l+1)%3; + n = (l+2)%3; + + aJ[l] = 0.0; + vbar = sqrt( 2.0 * kebar * I[m][m] ); + aJ[m] = vbar * gaussStream->getGaussian(); + vbar = sqrt( 2.0 * kebar * I[n][n] ); + aJ[n] = vbar * gaussStream->getGaussian(); + + } else { + for (j = 0 ; j < 3; j++) { + vbar = sqrt( 2.0 * kebar * I[j][j] ); + aJ[j] = vbar * gaussStream->getGaussian(); + } + } // else isLinear + + info->integrableObjects[vr]->setJ( aJ ); + + }//isDirectional + } // Get the Center of Mass drift velocity. @@ -277,36 +334,16 @@ void Thermo::velocitize() { // Corrects for the center of mass drift. // sums all the momentum and divides by total mass. - for(vd = 0; vd < n_atoms; vd++){ + for(vd = 0; vd < nobj; vd++){ - atoms[vd]->getVel(aVel); + info->integrableObjects[vd]->getVel(aVel); for (j=0; j < 3; j++) aVel[j] -= vdrift[j]; - atoms[vd]->setVel( aVel ); + info->integrableObjects[vd]->setVel( aVel ); } - if( n_oriented ){ - - for( i=0; iisDirectional() ){ - - dAtom = (DirectionalAtom *)atoms[i]; - dAtom->getI( I ); - - for (j = 0 ; j < 3; j++) { - vbar = sqrt( 2.0 * kebar * I[j][j] ); - aJ[j] = vbar * gaussStream->getGaussian(); - - } - - dAtom->setJ( aJ ); - - } - } - } } void Thermo::getCOMVel(double vdrift[3]){ @@ -314,24 +351,20 @@ void Thermo::getCOMVel(double vdrift[3]){ double mtot, mtot_local; double aVel[3], amass; double vdrift_local[3]; - int vd, n_atoms, j; - Atom** atoms; + int vd, j; + int nobj; - // We are very careless here with the distinction between n_atoms and n_local - // We should really fix this before someone pokes an eye out. + nobj = info->integrableObjects.size(); - n_atoms = info->n_atoms; - atoms = info->atoms; - mtot_local = 0.0; vdrift_local[0] = 0.0; vdrift_local[1] = 0.0; vdrift_local[2] = 0.0; - for(vd = 0; vd < n_atoms; vd++){ + for(vd = 0; vd < nobj; vd++){ - amass = atoms[vd]->getMass(); - atoms[vd]->getVel( aVel ); + amass = info->integrableObjects[vd]->getMass(); + info->integrableObjects[vd]->getVel( aVel ); for(j = 0; j < 3; j++) vdrift_local[j] += aVel[j] * amass; @@ -355,3 +388,66 @@ void Thermo::getCOMVel(double vdrift[3]){ } +void Thermo::getCOM(double COM[3]){ + + double mtot, mtot_local; + double aPos[3], amass; + double COM_local[3]; + int i, j; + int nobj; + + mtot_local = 0.0; + COM_local[0] = 0.0; + COM_local[1] = 0.0; + COM_local[2] = 0.0; + + nobj = info->integrableObjects.size(); + for(i = 0; i < nobj; i++){ + + amass = info->integrableObjects[i]->getMass(); + info->integrableObjects[i]->getPos( aPos ); + + for(j = 0; j < 3; j++) + COM_local[j] += aPos[j] * amass; + + mtot_local += amass; + } + +#ifdef IS_MPI + MPI_Allreduce(&mtot_local,&mtot,1,MPI_DOUBLE,MPI_SUM, MPI_COMM_WORLD); + MPI_Allreduce(COM_local,COM,3,MPI_DOUBLE,MPI_SUM, MPI_COMM_WORLD); +#else + mtot = mtot_local; + for(i = 0; i < 3; i++) { + COM[i] = COM_local[i]; + } +#endif + + for (i = 0; i < 3; i++) { + COM[i] = COM[i] / mtot; + } +} + +void Thermo::removeCOMdrift() { + double vdrift[3], aVel[3]; + int vd, j, nobj; + + nobj = info->integrableObjects.size(); + + // Get the Center of Mass drift velocity. + + getCOMVel(vdrift); + + // Corrects for the center of mass drift. + // sums all the momentum and divides by total mass. + + for(vd = 0; vd < nobj; vd++){ + + info->integrableObjects[vd]->getVel(aVel); + + for (j=0; j < 3; j++) + aVel[j] -= vdrift[j]; + + info->integrableObjects[vd]->setVel( aVel ); + } +}