Dear Dumux community,

I wish to use the richardsnc model for more than two components ( the main 
component  [water] + n other components).

However, the file "dumux\porousmediumflow\richardsnc\model.hh" uses the file 
"dumux/material/fluidsystems/liquidphase2c.hh" and we have moreover:

'''

/*!
 *\brief The fluid system used by the model.
 *
 * By default this uses the liquid phase fluid system with simple H2O.
 */
template<class TypeTag>
struct FluidSystem<TypeTag, TTag::RichardsNC>
{
    using Scalar = GetPropType<TypeTag, Properties::Scalar>;
    using type = FluidSystems::LiquidPhaseTwoC<Scalar, 
Components::SimpleH2O<Scalar>, Components::Constant<1, Scalar>>;
};
'''
Does it then mean that the file "richardsnc\model.hh"" needs to be adapted and 
a new file "dumux/material/fluidsystems/liquidphase3c.hh" (for 3 components) 
needs to be created before the richards model may be used for more than two 
components? And if that is the case, are there any other base files which would 
have to be changed/added before the richardsnc model may be used for a problem 
with more than 2 components?
Many thanks for your help!
Mona




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