forked from lijiext/lammps
158 lines
4.9 KiB
C++
158 lines
4.9 KiB
C++
#include "WeakEquationMomentum.h"
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#include "Material.h"
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#include "LammpsInterface.h"
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namespace ATC {
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//==============================================================
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// Class WeakEquationMomentum
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//==============================================================
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//--------------------------------------------------------------
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// Constructor
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//--------------------------------------------------------------
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WeakEquationMomentum::WeakEquationMomentum()
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: WeakEquation(DYNAMIC_PDE,VELOCITY,3)
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{}
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//--------------------------------------------------------------
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// Destructor
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//--------------------------------------------------------------
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WeakEquationMomentum::~WeakEquationMomentum()
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{}
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//---------------------------------------------------------------------
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// compute mass density
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//---------------------------------------------------------------------
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void WeakEquationMomentum::M_integrand(
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const FIELD_MATS &fields,
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const Material * material,
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DENS_MAT & density ) const
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{
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material->mass_density(fields, density);
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}
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//--------------------------------------------------------------
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void WeakEquationMomentum::B_integrand(
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const FIELD_MATS &fields,
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const GRAD_FIELD_MATS &grad_fields,
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const Material * material,
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DENS_MAT_VEC &flux) const
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{
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material->stress(fields, grad_fields, flux);
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}
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//--------------------------------------------------------------
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bool WeakEquationMomentum::N_integrand(
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const FIELD_MATS &fields,
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const GRAD_FIELD_MATS & /* grad_fields */,
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const Material * material,
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DENS_MAT &flux) const
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{
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return material->body_force(fields, flux);
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}
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//--------------------------------------------------------------
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void WeakEquationMomentum::E_integrand(
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const FIELD_MATS &fields,
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const GRAD_FIELD_MATS &grad_fields,
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const Material * material,
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DENS_MAT &energy) const
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{
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material->elastic_energy(fields, grad_fields, energy);
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}
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//==============================================================
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// Class WeakEquationMomentumElectrostatic
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//==============================================================
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//--------------------------------------------------------------
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// Constructor
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//--------------------------------------------------------------
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WeakEquationMomentumElectrostatic::WeakEquationMomentumElectrostatic()
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: WeakEquationMomentum()
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{
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// convert charge * electric field --> force
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qE2f_ = (ATC::LammpsInterface::instance()->qe2f());
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_E_.assign(3, DENS_MAT());
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}
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//--------------------------------------------------------------
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bool WeakEquationMomentumElectrostatic::N_integrand(
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const FIELD_MATS &fields,
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const GRAD_FIELD_MATS &grad_fields,
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const Material * material,
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DENS_MAT &flux) const
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{
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material->electric_field(fields, grad_fields, _E_);
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// "conversion" of grad scalar to vector field
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int nsd = _E_.size();
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flux.resize(_E_[0].nRows(),nsd);
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FIELD_MATS::const_iterator nField = fields.find(ELECTRON_DENSITY);
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const DENS_MAT & n = nField->second;
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for (int i=0; i < nsd; i++) {
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CLON_VEC fi = column(flux,i);
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fi = _E_[i];
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fi *= -qE2f_*n;
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}
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return true;
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}
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//==============================================================
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// Class WeakEquationMomentumDiffusion
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//==============================================================
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//--------------------------------------------------------------
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// Constructor
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//--------------------------------------------------------------
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WeakEquationMomentumDiffusion::WeakEquationMomentumDiffusion()
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: WeakEquation(DYNAMIC_PDE,VELOCITY,3)
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{}
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//--------------------------------------------------------------
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// Destructor
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//--------------------------------------------------------------
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WeakEquationMomentumDiffusion::~WeakEquationMomentumDiffusion()
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{}
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//---------------------------------------------------------------------
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// compute mass density
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//---------------------------------------------------------------------
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void WeakEquationMomentumDiffusion::M_integrand(
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const FIELD_MATS &fields,
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const Material * material,
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DENS_MAT & density ) const
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{
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material->mass_density(fields, density);
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}
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//--------------------------------------------------------------
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void WeakEquationMomentumDiffusion::B_integrand(
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const FIELD_MATS &fields,
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const GRAD_FIELD_MATS &grad_fields,
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const Material * material,
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DENS_MAT_VEC &flux) const
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{
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material->viscous_stress(fields, grad_fields, flux);
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}
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//---------------------------------------------------------------------
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void WeakEquationMomentumDiffusion::BB_tangent_coefficients(
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const FieldName /* field */,
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const FIELD_MATS &fields,
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const Material* material,
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DENS_MAT &coefs) const
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{
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material->viscosity(fields,coefs);
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}
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//--------------------------------------------------------------
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bool WeakEquationMomentumDiffusion::N_integrand(
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const FIELD_MATS &fields,
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const GRAD_FIELD_MATS & /* grad_fields */,
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const Material * material,
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DENS_MAT &flux) const
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{
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return material->body_force(fields, flux);
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}
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}; // END namespace
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