h2o_ch4.hh

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#ifndef DUMUX_BINARY_COEFF_H2O_CH4_HH
#define DUMUX_BINARY_COEFF_H2O_CH4_HH
 
#include <dumux/material/binarycoefficients/henryiapws.hh>
#include <dumux/material/binarycoefficients/fullermethod.hh>
 
#include <dumux/material/components/ch4.hh>
#include <dumux/material/components/h2o.hh>
 
namespace Dumux {
namespace BinaryCoeff {

class H2O_CH4
{
public:
    template <class Scalar>
    static Scalar henry(Scalar temperature)
    {
        const Scalar E = 2215.6977;
        const Scalar F = -0.1089;
        const Scalar G = -6.6240;
        const Scalar H = 4.6789;
 
        return henryIAPWS(E, F, G, H, temperature);
    }

    template <class Scalar>
    static Scalar gasDiffCoeff(Scalar temperature, Scalar pressure)
    {
        //         DUNE_THROW(Dune::NotImplemented, "diffusion coefficient for gasous water and methane");
 
        typedef Dumux::Components::H2O<Scalar> H2O;
        typedef Dumux::Components::CH4<Scalar> CH4;
 
        // atomic diffusion volumes
        // Vch4 = sum(ni*Vi) = 15.9 + 4*2.31 = 25.14 (Tang et al., 2015)--> method, (Poling et al., 2001, p.11.11)--> values
        const Scalar SigmaNu[2] = { 13.1 /* H2O */,  25.14 /* CH4 */ };
        // molar masses [g/mol]
        const Scalar M[2] = { H2O::molarMass()*Scalar(1e3), CH4::molarMass()*Scalar(1e3) };
 
        return fullerMethod(M, SigmaNu, temperature, pressure);
    }

    template <class Scalar>
    static Scalar liquidDiffCoeff(Scalar temperature, Scalar pressure)
    {
        return 2.93856e-11 * temperature - 6.89402e-09;
    }
};
 
} // end namespace BinaryCoeff
} // end namespace Dumux
 
#endif