Emily Boudreaux
85500fef3b
restricted the unknown state vector to surface deformation and implemented one prescription, NodalRadialSurface, while the full volumetric displacment field is reconstructed analytically from that. This reduced the number of degrees of freedom in the system by a factor of 80 while also removing many null vectors from the system.
66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
module;
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#include <cmath>
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#include <format>
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#include <stdexcept>
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#include <type_traits>
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export module mean_field:surface.constant;
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export import :eos.quantities;
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export namespace mean_field::surface {
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struct PressureSurfaceDescriptor final {
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double targetPressure;
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};
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/*
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* The only physical surface condition currently supported by
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* MeanField. It says nothing about which thermodynamic variable appears
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* in a nonlinear state vector; resolving pressure into that representation
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* is an EOS responsibility.
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*/
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class ConstantPressureSurface final {
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public:
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using PhysicalQuantity = eos::quantity::Pressure;
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using TargetValue = eos::PressureValue;
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explicit ConstantPressureSurface(const TargetValue targetPressure) : m_targetPressure(targetPressure) {
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if (!std::isfinite(targetPressure.value())) {
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throw std::invalid_argument(
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std::format(
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"The target surface pressure must be finite. Instead P = {} was provided.",
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targetPressure.value()
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)
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);
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}
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if (targetPressure.value() < 0.0) {
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throw std::invalid_argument(
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std::format(
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"The target surface pressure must be non-negative. Instead P = {} was provided.",
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targetPressure.value()
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)
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);
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}
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}
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[[nodiscard]] TargetValue targetPressure() const noexcept {
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return m_targetPressure;
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}
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[[nodiscard]] PressureSurfaceDescriptor descriptor() const noexcept {
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return PressureSurfaceDescriptor{.targetPressure = m_targetPressure.value()};
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}
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private:
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TargetValue m_targetPressure;
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};
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template <typename Candidate>
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concept ConstantPressureSurfaceType = std::same_as<std::remove_cvref_t<Candidate>, ConstantPressureSurface>;
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// Familiar physical terminology retained as a synonym, not as a second
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// surface-condition type.
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using Isobaric = ConstantPressureSurface;
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} // namespace mean_field::surface
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