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test: Add advection test case with left-to-right flow

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This commit is contained in:
Max Lübke 2025-02-07 09:53:00 +01:00
parent bdb44b4fd5
commit 031905b4c8
2 changed files with 71 additions and 1 deletions
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3
test/CMakeLists.txt
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@ -12,9 +12,10 @@ FetchContent_MakeAvailable(googletest)
add_executable(testTug
setup.cpp
testDiffusion.cpp
testVelocities.cpp
testAdvection.cpp
testFTCS.cpp
testBoundary.cpp
testVelocities.cpp
)
target_link_libraries(testTug tug GTest::gtest)

69
test/testAdvection.cpp Normal file
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@ -0,0 +1,69 @@
#include <gtest/gtest.h>
#include <tug/tug.hpp>
#define ADVECTION_TEST(x) TEST(Advection, x)
ADVECTION_TEST(LeftToRight) {
constexpr std::size_t rows = 21;
constexpr std::size_t cols = 21;
constexpr double K = 1E-2;
constexpr double timestep = 5039.05;
constexpr std::size_t iterations = 21;
constexpr double porosity = 0.2;
constexpr double epsilon = 1E-13;
tug::RowMajMat<double> hydHeads =
tug::RowMajMat<double>::Constant(rows, cols, 1);
tug::RowMajMat<double> concentrations =
tug::RowMajMat<double>::Constant(rows, cols, 0);
tug::RowMajMat<double> permK =
tug::RowMajMat<double>::Constant(rows, cols, K);
tug::Velocities<double, tug::HYDRAULIC_MODE::STEADY_STATE,
tug::HYDRAULIC_RESOLVE::IMPLICIT>
velocities(hydHeads);
velocities.setDomain(100, 100);
velocities.setPermKX(permK);
velocities.setPermKY(permK);
velocities.setEpsilon(1E-8);
tug::Advection advection(concentrations, velocities);
advection.setPorosity(tug::RowMajMat<double>::Constant(rows, cols, porosity));
advection.setIterations(iterations);
advection.setTimestep(timestep);
tug::Boundary<double> &bcH = velocities.getBoundaryConditions();
bcH.setBoundarySideConstant(tug::BC_SIDE_LEFT, 10);
bcH.setBoundarySideConstant(tug::BC_SIDE_RIGHT, 1);
tug::Boundary<double> &bcC = advection.getBoundaryConditions();
bcC.setBoundarySideConstant(tug::BC_SIDE_LEFT, 0.1);
bcC.setBoundarySideConstant(tug::BC_SIDE_RIGHT, 1);
advection.run();
// check if the concentration is transported from left to right
for (std::size_t i_rows = 0; i_rows < rows; i_rows++) {
for (std::size_t i_cols = 0; i_cols < cols - 1; i_cols++) {
if (i_cols == 0) {
EXPECT_LE(concentrations(i_rows, i_cols), 10);
} else {
EXPECT_GE(concentrations(i_rows, i_cols),
concentrations(i_rows, i_cols + 1));
}
}
}
// the values should also be equal from top to bottom
for (std::size_t i_cols = 0; i_cols < cols; i_cols++) {
const double &ref = concentrations(0, i_cols);
for (std::size_t i_rows = 1; i_rows < rows; i_rows++) {
// check if the values are equal within the epsilon range
EXPECT_NEAR(ref, concentrations(i_rows, i_cols), epsilon);
}
}
}