forked from lijiext/lammps
73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
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#ifndef BODY_FORCE_H
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#define BODY_FORCE_H
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#include <map>
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#include <string>
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using std::map;
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using std::string;
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#include "ATC_TypeDefs.h"
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#include "Function.h"
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namespace ATC {
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/**
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* @class BodyForce
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* @brief Base class for models of body forces in the momentum eqn
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*/
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class BodyForce
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{
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public:
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BodyForce() {};
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virtual ~BodyForce() {};
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virtual bool body_force(const FIELD_MATS &fields,
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DENS_MAT &flux) const { return false; };
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};
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/**
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* @class BodyForceViscous
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* @brief viscous body forces
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*/
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class BodyForceViscous : public BodyForce
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{
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public:
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BodyForceViscous(fstream &matfile,map<string,double> & parameters);
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virtual ~BodyForceViscous() {};
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virtual bool body_force(const FIELD_MATS &fields,
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DENS_MAT &flux) const
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{
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FIELD_MATS::const_iterator v_field = fields.find(VELOCITY);
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const DENS_MAT & v = v_field->second;
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flux = -gamma_*v;
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return true;
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}
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protected:
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double gamma_;
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};
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/**
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* @class BodyForceElectricField
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* @brief electric field body forces
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*/
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class BodyForceElectricField : public BodyForce
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{
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public:
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BodyForceElectricField(fstream &matfile,map<string,double> & parameters)
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{ throw ATC_Error("unimplemented due to issues with accessing electric field"); }
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virtual ~BodyForceElectricField() {};
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virtual bool body_force(const FIELD_MATS &fields,
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DENS_MAT &flux) const
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{
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FIELD_MATS::const_iterator v_field = fields.find(VELOCITY);
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const DENS_MAT & v = v_field->second;
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int nNodes = v.nRows();
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flux.reset(nNodes,1);
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return true;
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}
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};
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}
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#endif
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