awnsurfacepolynomialedgezero2ndorder.hh

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#ifndef AWN_SURFACE_POLYNOMIAL_EDGE_ZERO_2ND_ORDER_HH
#define AWN_SURFACE_POLYNOMIAL_EDGE_ZERO_2ND_ORDER_HH
 
#include "awnsurfacepolynomialedgezero2ndorderparams.hh"
 
#include <dune/common/exceptions.hh>
 
#include <algorithm>
#include <math.h>
#include <assert.h>
 
namespace Dumux {
 
template <class ParamsT>
class AwnSurfacePolynomialEdgeZero2ndOrder
{
public:
    using Params = ParamsT;
    using Scalar = typename Params::Scalar;
 
    static Scalar interfacialArea(const Params &params, const Scalar Sw, const Scalar pc)
    {
        const Scalar a1     = params.a1();
        const Scalar a2     = params.a2();
        const Scalar a3     = params.a3();
        const Scalar Swr    = params.Swr();
        const Scalar factor = (Swr-Sw)*(1.-Sw) ;
 
        const Scalar aAlphaBeta = a1*factor + a2*factor*pc + a3*factor*pc*pc;
        return aAlphaBeta;
    }
 
 
    static Scalar dawn_dpc (const Params &params, const Scalar Sw, const Scalar pc)
    {
        const Scalar Swr    = params.Swr();
        const Scalar a1     = params.a1();
        const Scalar a2     = params.a2();
        const Scalar a3     = params.a3();
        const Scalar value =  a2*(Swr-Sw)*(1-Sw) + a3*(Swr-Sw)*(1-Sw)*pc;
        return value;
    }
 
    static Scalar dawn_dsw (const Params &params, const Scalar Sw, const Scalar pc)
    {
        const Scalar Swr                = params.Swr();
        const Scalar a1     = params.a1();
        const Scalar a2     = params.a2();
        const Scalar a3     = params.a3();
        const Scalar derivativeFactor   = (Sw-1.)+(Sw-Swr);
        const Scalar value = a1 * derivativeFactor + a2 * derivativeFactor * pc + a3 * derivativeFactor * pc*pc ;
        return value;
    }
 
};
} // namespace Dumux
 
#endif