added Test for Brooks&Corey relative permeabiluity property

Tests/MaterialLib/TestMPLRelPermBrooksCorey.cpp

+/**
+ * \file
+ *
+ * \copyright
+ * Copyright (c) 2012-2019, 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 <gtest/gtest.h>
+#include <sstream>
+
+#include "TestMPL.h"
+#include "Tests/TestTools.h"
+
+#include "MaterialLib/MPL/Medium.h"
+#include "MaterialLib/MPL/Properties/RelPermBrooksCorey.h"
+
+TEST(MaterialPropertyLib, RelPermBrooksCorey)
+{
+    const double ref_lambda = 2.5;
+    const double ref_residual_liquid_saturation = 0.01;
+    const double ref_residual_gas_saturation = 0.01;
+    const double ref_k_rel_L_min = 1.e-9;
+    const double ref_k_rel_G_min = 1.e-7;
+
+    std::stringstream m_beg;
+    std::stringstream m_end;
+
+    m_beg << "<medium>\n";
+    m_beg << "<phases></phases>\n";
+    m_beg << "<properties>\n";
+    m_beg << "  <property>\n";
+    m_beg << "    <name>saturation</name>\n";
+    m_beg << "    <type>Constant</type>\n";
+    // constant saturation value will be inserted here...
+    m_end << "  </property>\n";
+    m_end << "  <property>\n";
+    m_end << "    <name>relative_permeability</name>\n";
+    m_end << "    <type>RelPermBrooksCorey</type>\n";
+    m_end << "    <residual_liquid_saturation>"
+          << ref_residual_liquid_saturation
+          << "</residual_liquid_saturation>\n";
+    m_end << "    <residual_gas_saturation>" << ref_residual_gas_saturation
+          << "</residual_gas_saturation>\n";
+    m_end << "    <lambda>" << ref_lambda << "</lambda>\n";
+    m_end << "    <min_relative_permeability_liquid>" << ref_k_rel_L_min
+          << "</k_rel_min_liquid>\n";
+    m_end << "    <min_relative_permeability_gas>" << ref_k_rel_G_min
+          << "</k_rel_min_gas>\n";
+    m_end << "  </property>\n";
+    m_end << "</properties>\n";
+    m_end << "</medium>\n";
+
+    std::array<double, 16> ref_saturation = {
+        -0.01, 0.00, 0.01, 0.02, 0.04, 0.10, 0.20, 0.40,
+        0.60,  0.80, 0.90, 0.96, 0.98, 0.99, 1.00, 1.01};
+
+    std::array<double, 16> ref_k_rel_L = {
+        1.0000000000E-09, 1.0000000000E-09, 1.0000000000E-09, 2.7123199126E-08,
+        1.7636064574E-06, 1.1467333635E-04, 1.9615735463E-03, 3.0156880778E-02,
+        1.4540473747E-01, 4.4088351375E-01, 6.9346243084E-01, 8.8856788446E-01,
+        9.6177504114E-01, 1.0000000000E+00, 1.0000000000E+00, 1.0000000000E+00};
+
+    std::array<double, 16> ref_k_rel_G = {
+        1.0000000000E+00, 1.0000000000E+00, 1.0000000000E+00, 9.7944075784E-01,
+        9.3794411438E-01, 8.1354659673E-01, 6.1592154540E-01, 2.9343532599E-01,
+        9.4837870477E-02, 1.2086349932E-02, 1.3426518034E-03, 5.1003060118E-05,
+        1.9046571241E-06, 1.0000000000E-07, 1.0000000000E-07, 1.0000000000E-07};
+
+    std::array<double, 16> ref_dk_rel_L_ds_L = {
+        0.0000000000E+00, 0.0000000000E+00, 0.0000000000E+00, 1.0306815668E-05,
+        2.2339015126E-04, 4.8417630905E-03, 3.9231470925E-02, 2.9383627425E-01,
+        9.3650508877E-01, 2.1207055092E+00, 2.9608508283E+00, 3.5542715378E+00,
+        3.7677785117E+00, 3.8775510204E+00, 0.0000000000E+00, 0.0000000000E+00};
+
+    std::array<double, 16> ref_dk_rel_G_ds_L = {
+        0.0000000000E+00,  0.0000000000E+00,  -2.0408163265E+00,
+        -2.0654018726E+00, -2.0807295100E+00, -2.0524729938E+00,
+        -1.8805652791E+00, -1.3132397982E+00, -6.8017950205E-01,
+        -1.8533091175E-01, -4.4178730635E-02, -5.0791425970E-03,
+        -5.7061547092E-04, -0.0000000000E+00, 0.0000000000E+00,
+        0.0000000000E+00};
+
+    for (size_t idx = 0; idx < ref_saturation.size(); idx++)
+    {
+        std::stringstream m_sat;
+        m_sat << "    <value>" << ref_saturation[idx] << "</value>\n";
+        std::stringstream m;
+        m << m_beg.str() << m_sat.str() << m_end.str();
+
+        auto const& medium = createTestMaterial(m.str());
+        MaterialPropertyLib::VariableArray variable_array;
+        ParameterLib::SpatialPosition const pos;
+        double const time = std::numeric_limits<double>::quiet_NaN();
+
+        auto k_rel =
+            medium
+                ->property(
+                    MaterialPropertyLib::PropertyType::relative_permeability)
+                .template value<MaterialPropertyLib::Pair>(variable_array, pos,
+                                                           time);
+
+        auto dk_rel_ds_L =
+            medium
+                ->property(
+                    MaterialPropertyLib::PropertyType::relative_permeability)
+                .template dValue<MaterialPropertyLib::Pair>(
+                    variable_array,
+                    MaterialPropertyLib::Variable::liquid_saturation, pos,
+                    time);
+
+        auto k_rel_L = k_rel[0];
+        auto k_rel_G = k_rel[1];
+
+        auto dk_rel_L_ds_L = dk_rel_ds_L[0];
+        auto dk_rel_G_ds_L = dk_rel_ds_L[1];
+
+        ASSERT_NEAR(k_rel_L, ref_k_rel_L[idx], 1.0e-10);
+        ASSERT_NEAR(k_rel_G, ref_k_rel_G[idx], 1.0e-10);
+        ASSERT_NEAR(dk_rel_L_ds_L, ref_dk_rel_L_ds_L[idx], 1.0e-10);
+        ASSERT_NEAR(dk_rel_G_ds_L, ref_dk_rel_G_ds_L[idx], 1.0e-10);
+    }
+}
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