void eval(SpaceTimeData const &x_t, MediaData const &media_data, TemperatureData const &T_data, PorosityData const &porosity_data, PorosityDerivativeData const &porosity_d_data, SaturationData const &S_L_data, SaturationDataDeriv const &dS_L_dp_cap, ThermalConductivityData< DisplacementDim > &thermal_conductivity_data) const