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WeakEquationElectronMomentum.h
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Mon, Oct 14, 16:53

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

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