GradVelocityField.h

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// This file is part of the MercuryDPM project (https://www.mercurydpm.org).
// Copyright (c), The MercuryDPM Developers Team. All rights reserved.
// License: BSD 3-Clause License; see the LICENSE file in the root directory.
 
#ifndef GradVelocityField_H
#define GradVelocityField_H
 
#include <Math/Matrix.h>
#include <Math/MatrixSymmetric.h>
#include <CG/Functions/IntegralType.h>
 
#include "BaseFields.h"
 
class BaseParticle;
 
class BaseInteraction;
 
namespace CGFields
{
 
class GradVelocityField : public BaseFields
{
public:
    
    GradVelocityField();
    
    GradVelocityField(const GradVelocityField& P) = default;
    
    ~GradVelocityField() = default;
    
    static void writeNames(std::ostream& os, unsigned countVariables);
    
    void write(std::ostream& os) const;
    
    void output(std::ostream& os) const;
    
    void setZero();
    
    GradVelocityField getSquared() const;
    
    GradVelocityField& operator=(const GradVelocityField& P);
    
    GradVelocityField& operator+=(const GradVelocityField& P);
    
    GradVelocityField& operator-=(const GradVelocityField& P);
    
    GradVelocityField& operator/=(Mdouble a);
    
    GradVelocityField operator*(Mdouble a) const;
    
    void addParticleStatistics(Mdouble phi, const GradVelocityField& currentInteraction);
    
    void addParticleDifferentialStatistics(Vec3D& dphi, const GradVelocityField& currentInteraction);
    
    void addInteractionStatistics(Mdouble psi, const GradVelocityField& currentInteraction);
    
    void addContactPointStatistics(Mdouble phi, const GradVelocityField& currentInteraction);
    
    void setFields(const BaseInteraction& c, IntegralType type);
    
    void setCylindricalFields(const BaseInteraction& c, IntegralType type);
    
    void setFields(const BaseParticle& p);
    
    void setCylindricalFields(const BaseParticle& p);
    
    
    static bool doInteractionStatistics();
    
    Mdouble getDensity() const
    {
        return density_;
    }
    
    Vec3D getMomentum() const
    {
        return momentum_;
    }
    
    Vec3D getDDensity() const
    {
        return ddensity_;
    }
    
    Matrix3D getDMomentum() const
    {
        return dmomentum_;
    }
    
    static bool evaluateFixedParticles()
    {
        return false;
    }
    
    static bool isDifferentialField()
    {
        return true;
    }
 
private:
    
    Mdouble density_;
    Vec3D momentum_;
    Vec3D ddensity_;
    Matrix3D dmomentum_;
};
    
}
#endif