newtonianfluid.h

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/*
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 *
 *
 *             OOFEM : Object Oriented Finite Element Code
 *
 *               Copyright (C) 1993 - 2025   Borek Patzak
 *
 *
 *
 *       Czech Technical University, Faculty of Civil Engineering,
 *   Department of Structural Mechanics, 166 29 Prague, Czech Republic
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
 
#ifndef newtonianfluid_h
#define newtonianfluid_h
 
#include "fm/Materials/fluiddynamicmaterial.h"
#include "floatarray.h"
#include "floatmatrix.h"
#include "matconst.h"
#include "matstatus.h"


#define _IFT_NewtonianFluidMaterial_Name "newtonianfluid"
#define _IFT_NewtonianFluidMaterial_mu "mu"
 
namespace oofem {
class GaussPoint;

class NewtonianFluidMaterial : public FluidDynamicMaterial
{
protected:
    double viscosity;
 
public:
    NewtonianFluidMaterial(int n, Domain * d) : FluidDynamicMaterial(n, d) { }
 
    double giveEffectiveViscosity(GaussPoint *gp, TimeStep *tStep) const override;
 
    FloatArrayF<6> computeDeviatoricStress3D(const FloatArrayF<6> &eps, GaussPoint *gp, TimeStep *tStep) const override;
    FloatMatrixF<6,6> computeTangent3D(MatResponseMode, GaussPoint *gp, TimeStep *tStep) const override;
 
    double give(int aProperty, GaussPoint *gp) const override;
    void initializeFrom(InputRecord &ir) override;
    void giveInputRecord(DynamicInputRecord &input) override;
    const char *giveClassName() const override { return "NewtonianFluidMaterial"; }
    const char *giveInputRecordName() const override { return _IFT_NewtonianFluidMaterial_Name; }
    int checkConsistency() override;
    std::unique_ptr<MaterialStatus> CreateStatus(GaussPoint *gp) const override;
};
} // end namespace oofem
#endif // newtonianfluid_h