[PL] Added constitutive model/data: Biot

ProcessLib/ThermoRichardsMechanics/Constitutive/Biot.cpp

+/**
+ * \file
+ * \copyright
+ * Copyright (c) 2012-2022, OpenGeoSys Community (http://www.opengeosys.org)
+ *            Distributed under a Modified BSD License.
+ *              See accompanying file LICENSE.txt or
+ *              http://www.opengeosys.org/project/license
+ *
+ */
+
+#include "Biot.h"
+
+#include "MaterialLib/MPL/Utils/FormEigenTensor.h"
+
+namespace ProcessLib::ThermoRichardsMechanics
+{
+void BiotModel::eval(SpaceTimeData const& x_t, MediaData const& media_data,
+                     BiotData& out) const
+{
+    namespace MPL = MaterialPropertyLib;
+    MPL::VariableArray variables;
+
+    out.alpha = media_data.medium.property(MPL::PropertyType::biot_coefficient)
+                    .template value<double>(variables, x_t.x, x_t.t, x_t.dt);
+}
+}  // namespace ProcessLib::ThermoRichardsMechanics

ProcessLib/ThermoRichardsMechanics/Constitutive/Biot.h

+/**
+ * \file
+ * \copyright
+ * Copyright (c) 2012-2022, OpenGeoSys Community (http://www.opengeosys.org)
+ *            Distributed under a Modified BSD License.
+ *              See accompanying file LICENSE.txt or
+ *              http://www.opengeosys.org/project/license
+ *
+ */
+
+#pragma once
+
+#include "Base.h"
+
+namespace ProcessLib::ThermoRichardsMechanics
+{
+struct BiotData
+{
+    double alpha;
+};
+
+struct BiotModel
+{
+    void eval(SpaceTimeData const& x_t, MediaData const& media_data,
+              BiotData& out) const;
+};
+}  // namespace ProcessLib::ThermoRichardsMechanics