ATC version 2.0, date: Aug7

git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@10561 f3b2605a-c512-4ea7-a41b-209d697bcdaa
2013-08-07 21:34:54 +00:00
parent fafff431e9
commit 7855ef6dda
195 changed files with 83477 additions and 4499 deletions
--- a/lib/atc/ElectronDragPower.cpp
+++ b/lib/atc/ElectronDragPower.cpp
@ -0,0 +1,71 @@
+#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_;
+}
+
+}
+