Emily Boudreaux
cb20faeb3d
The test suite is extensive. Note that LLMs were used to aid in the development of the test suite. All LLM generated code was manually reviewed.
42 lines
2.4 KiB
C++
42 lines
2.4 KiB
C++
#pragma once
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#include <cmath>
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#include "serif/dimensions/partial.hpp"
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#include "serif/dimensions/type_alias.hpp"
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#include "serif/eos/relations/relations.hpp"
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namespace serif::tests::equations {
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/** @brief A nonpolytropic barotrope P = rho^2 + rho^4 with no enthalpy relation or polytropic parameters. */
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struct MixedPowerBarotrope final {
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using Relations = eos::relations::RelationCatalog<eos::relations::PressureFromDensity,
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eos::relations::DensityFromPressure, eos::relations::PressurePotentialFromDensity>;
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double gauge = 0.0;
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/** @brief Evaluate the independently specified pressure law at the tested nonnegative densities. */
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[[nodiscard]] dimensions::PressureValue evaluate(eos::relations::PressureFromDensity, const dimensions::DensityValue density) const {
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const double squared_density = density.value() * density.value();
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return dimensions::PressureValue{squared_density + squared_density * squared_density};
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}
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/** @brief Invert the pressure law using the rationalized positive root. */
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[[nodiscard]] dimensions::DensityValue evaluate(eos::relations::DensityFromPressure, const dimensions::PressureValue pressure) const {
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return dimensions::DensityValue{std::sqrt(2.0 * pressure.value() / (1.0 + std::sqrt(1.0 + 4.0 * pressure.value())))};
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}
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/** @brief Integrate P_rho/rho and expose an arbitrary additive constant. */
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[[nodiscard]] dimensions::BarotropicPressurePotentialValue evaluate(
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eos::relations::PressurePotentialFromDensity, const dimensions::DensityValue density) const {
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return dimensions::BarotropicPressurePotentialValue{2.0 * density.value() +
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(4.0 / 3.0) * density.value() * density.value() * density.value() + gauge};
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}
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/** @brief Supply the only thermodynamic derivative required by the density equation. */
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[[nodiscard]] dimensions::PartialDerivative<dimensions::Pressure, dimensions::MassDensity> partial_derivative(
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eos::relations::PressureFromDensity, dimensions::WithRespectTo<dimensions::MassDensity>, const dimensions::DensityValue density) const {
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return dimensions::PartialDerivative<dimensions::Pressure, dimensions::MassDensity>{
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2.0 * density.value() + 4.0 * density.value() * density.value() * density.value()};
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}
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};
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}
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