awnsurfacepolynomial2ndorder.hh

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#ifndef AWN_SURFACE_POLYNOMIAL_2ND_ORDER_HH
#define AWN_SURFACE_POLYNOMIAL_2ND_ORDER_HH
 
#include "awnsurfacepolynomial2ndorderparams.hh"
 
#include <dune/common/exceptions.hh>
 
#include <algorithm>
#include <cmath>
#include <assert.h>
 
namespace Dumux {

template <class ScalarT, class ParamsT = AwnSurfacePolynomial2ndOrderParams<ScalarT> >
class AwnSurfacePolynomial2ndOrder
{
public:
    using Params = ParamsT;
    using Scalar = typename Params::Scalar;

    static Scalar interfacialArea(const Params & params, const Scalar Sw, const Scalar pc)
    {
        const Scalar a00 = params.a00();
        const Scalar a10 = params.a10();
        const Scalar a20 = params.a20();
        const Scalar a11 = params.a11();
        const Scalar a01 = params.a01();
        const Scalar a02 = params.a02();
 
        using std::pow;
        const Scalar aAlphaBeta = a00 + a10 * Sw + a20 * pow(Sw,2) + a11*Sw*pc +  a01*pc + a02*pow(pc,2);
        return aAlphaBeta;
    }
 

    static Scalar dawn_dpc (const Params & params, const Scalar Sw, const Scalar pc)
    {
        const Scalar value = params.a11()*Sw + params.a01() + 2.0*params.a02() * pc;
        return value;
    }

    static Scalar dawn_dsw (const Params &params, const Scalar Sw, const Scalar pc)
    {
        const Scalar value = params.a11()*pc + params.a10() + 2.0*params.a20()*Sw;
        return value;
    }
 
};
} // end namespace Dumux
 
#endif