porositylinearporoelasticity.hh

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// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
//
// SPDX-FileCopyrightText: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
// SPDX-License-Identifier: GPL-3.0-or-later
//
#ifndef DUMUX_MATERIAL_POROSITY_LINEAR_POROELASTICITY_HH
#define DUMUX_MATERIAL_POROSITY_LINEAR_POROELASTICITY_HH
 
#include <dune/common/exceptions.hh>
 
namespace Dumux {

template<class Scalar>
class PorosityLinearPoroElasticity
{
public:
    PorosityLinearPoroElasticity(Scalar refPorosity, Scalar biotCoefficient, Scalar drainedBulkModulus)
    : refPorosity_(refPorosity)
    , biotCoefficient_(biotCoefficient)
    , inverseN_((biotCoefficient - refPorosity)*(1.0 - biotCoefficient)/drainedBulkModulus)
    {
        if (biotCoefficient < refPorosity || biotCoefficient > 1.0)
            DUNE_THROW(Dune::RangeError, "The Biot coefficient " << biotCoefficient
                        << " is not in [" << refPorosity << ", 1]");
    }

    Scalar evaluatePorosity(Scalar volumetricStrainChange, Scalar pressureChange) const
    { return refPorosity_ + biotCoefficient_*volumetricStrainChange + inverseN_*pressureChange; }

    Scalar biotModulus(Scalar fluidBulkModulus) const
    { return 1.0/(refPorosity_/fluidBulkModulus + inverseN_); }
 
private:
    Scalar refPorosity_;
    Scalar biotCoefficient_;
    Scalar inverseN_;
};
 
} // end namespace Dumux
 
#endif