7855ef6dda
git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@10561 f3b2605a-c512-4ea7-a41b-209d697bcdaa
72 lines
2.1 KiB
C++
72 lines
2.1 KiB
C++
#include "ElectronDragPower.h"
|
|
#include "Material.h"
|
|
#include "ATC_Error.h"
|
|
|
|
#include <iostream>
|
|
#include <fstream>
|
|
|
|
using ATC_Utility::command_line;
|
|
using ATC_Utility::str2dbl;
|
|
|
|
namespace ATC {
|
|
|
|
ElectronDragPowerLinear::ElectronDragPowerLinear(fstream &fileId,
|
|
map<string,double> & parameters,
|
|
Material * material)
|
|
: ElectronDragPower(),
|
|
electronDragInvTau_(0),
|
|
material_(material)
|
|
{
|
|
if (!fileId.is_open()) throw ATC_Error("cannot open material file");
|
|
vector<string> line;
|
|
while(fileId.good()) {
|
|
command_line(fileId, line);
|
|
if (line.size() == 0) continue;
|
|
if (line[0] == "end") break;
|
|
double value = str2dbl(line[1]);
|
|
if (line[0] == "inv_momentum_relaxation_time") {
|
|
electronDragInvTau_ = value;
|
|
parameters["inv_momentum_relaxation_time"] = electronDragInvTau_;
|
|
}
|
|
else {
|
|
throw ATC_Error( "unrecognized material function "+line[0]);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool ElectronDragPowerLinear::electron_drag_power(const FIELD_MATS &fields,
|
|
const GRAD_FIELD_MATS &gradFields,
|
|
DENS_MAT & flux)
|
|
{
|
|
|
|
FIELD_MATS::const_iterator evField = fields.find(ELECTRON_VELOCITY);
|
|
const DENS_MAT & v = evField->second;
|
|
|
|
// -1/tau (m_e * n * v)
|
|
electron_drag_velocity_coefficient(fields,dragCoefWorkspace_);
|
|
for (int i = 0; i < v.nRows(); i++) {
|
|
double velocityMagnitude = 0.;
|
|
for (int j = 0; j < v.nCols(); j++)
|
|
velocityMagnitude -= v(i,j)*v(i,j);
|
|
flux(i,0) += velocityMagnitude*dragCoefWorkspace_(i,0); // adds flux to phonon temperature
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void ElectronDragPowerLinear::electron_drag_velocity_coefficient(const FIELD_MATS &fields,
|
|
DENS_MAT & dragCoef)
|
|
{
|
|
FIELD_MATS::const_iterator enField = fields.find(ELECTRON_DENSITY);
|
|
const DENS_MAT & n = enField->second;
|
|
|
|
// -1/tau (m_e * n)
|
|
material_->inv_effective_mass(fields,invEffMassWorkspace_);
|
|
dragCoef = n;
|
|
dragCoef /= invEffMassWorkspace_;
|
|
dragCoef *= -electronDragInvTau_;
|
|
}
|
|
|
|
}
|
|
|