VanGenuchtenCapillaryPressure.h

// Copyright 2024, UChicago Argonne, LLC
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// Software Name: NEML2 -- the New Engineering material Model Library, version 2
// By: Argonne National Laboratory
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#pragma once
#include "neml2/models/porous_flow/CapillaryPressure.h"
 
namespace neml2
{
class VanGenuchtenCapillaryPressure : public CapillaryPressure
{
public:
  static OptionSet expected_options();
 
  VanGenuchtenCapillaryPressure(const OptionSet & options);
 
protected:
  std::tuple<Scalar, Scalar, Scalar>
  calculate_pressure(const Scalar & S, bool out, bool dout_din, bool d2out_din2) const override;
 
  const Scalar & _a;
  const Scalar & _m;
};
} // namespace neml2