forked from lijiext/lammps
118 lines
3.7 KiB
C++
118 lines
3.7 KiB
C++
#ifndef WEAK_EQUATION_ELECTRON_MOMENTUM_H
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#define WEAK_EQUATION_ELECTRON_MOMENTUM_H
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#include <set>
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#include <string>
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#include "WeakEquation.h"
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namespace ATC{
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class Material;
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/**
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* @class WeakEquationElectronMomentum
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* @brief Electron momentum
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* rho v,t = div P -->
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* int M rho v,t = int B P
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*/
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class WeakEquationElectronMomentum : public WeakEquation {
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public:
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// constructor
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WeakEquationElectronMomentum();
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// destructor
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virtual ~WeakEquationElectronMomentum();
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/** density that used to form the mass matrix */
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virtual bool has_M_integrand(void) const {return true;}
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virtual void M_integrand(const FIELD_MATS &fields,
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const Material * material,
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DENS_MAT &density ) const ;
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/** convection for flux */
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virtual bool has_B_integrand(void) const {return true;}
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virtual void B_integrand(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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/** necessary interfaces */
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virtual std::set<std::string> needs_material_functions(void) const
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{
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std::string list[2] = {"inv_effective_mass","electron_heat_capacity"};
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std::set<std::string> needs(list,list+2);
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return needs;
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}
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protected:
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/** computes standard velocity convective fluxes */
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virtual void convection(const FIELD_MATS &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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/**
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* @class WeakEquationElectronMomentumDDM
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* @brief Electron momentum - drift diffusion
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* rho v,t = div P -->
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* int M rho v,t = int B P
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*/
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class WeakEquationElectronMomentumDDM : public WeakEquationElectronMomentum {
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public:
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// constructor
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WeakEquationElectronMomentumDDM();
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// destructor
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virtual ~WeakEquationElectronMomentumDDM();
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/** density that used to form the mass matrix */
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virtual void M_integrand(const FIELD_MATS &fields,
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const Material * material,
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DENS_MAT &density ) const ;
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/** flux that is integrated with grad N as its weight */
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virtual bool has_B_integrand(void) const {return false;}
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virtual void B_integrand(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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/** flux that is integrated with N as its weight */
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virtual bool has_N_integrand(void) const {return true;}
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virtual bool N_integrand(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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/** necessary interfaces */
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virtual std::set<std::string> needs_material_functions(void) const
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{
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std::set<std::string> needs
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= WeakEquationElectronMomentum::needs_material_functions();
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needs.insert("electron_drag_coefficient");
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needs.insert("electron_heat_capacity");
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needs.insert("electric_displacement");
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return needs;
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}
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protected:
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/** computes thermal stresses arising from convection */
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virtual void thermal_stress(const FIELD_MATS &fields,
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const GRAD_FIELD_MATS &gradFields,
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const Material * material,
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DENS_MAT &flux) const ;
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/** workspace variables */
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mutable DENS_MAT_VEC _dnCp_;
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mutable DENS_MAT_VEC _electricForce_;
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};
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};
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#endif
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