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1 0 : // Distributed under the MIT License. 2 : // See LICENSE.txt for details. 3 : 4 : #pragma once 5 : 6 : #include <cstddef> 7 : 8 : #include "DataStructures/VariablesTag.hpp" 9 : #include "Evolution/Systems/Burgers/BoundaryConditions/BoundaryCondition.hpp" 10 : #include "Evolution/Systems/Burgers/BoundaryCorrections/BoundaryCorrection.hpp" 11 : #include "Evolution/Systems/Burgers/Characteristics.hpp" 12 : #include "Evolution/Systems/Burgers/Tags.hpp" // IWYU pragma: keep 13 : #include "Evolution/Systems/Burgers/TimeDerivativeTerms.hpp" 14 : #include "Utilities/TMPL.hpp" 15 : 16 : /// \ingroup EvolutionSystemsGroup 17 : /// \brief Items related to evolving the %Burgers equation 18 : /// \f$0 = \partial_t U + \partial_x\left(U^2/2\right)\f$. 19 : /// 20 : /// \note For this definition (i.e., with the factor of one half in the flux) 21 : /// of the Burgers system, the local characteristic speed is \f$U\f$. 22 : namespace Burgers { 23 0 : struct System { 24 0 : static constexpr bool is_in_flux_conservative_form = true; 25 0 : static constexpr bool has_primitive_and_conservative_vars = false; 26 0 : static constexpr size_t volume_dim = 1; 27 : 28 0 : using boundary_conditions_base = BoundaryConditions::BoundaryCondition; 29 0 : using boundary_correction_base = BoundaryCorrections::BoundaryCorrection; 30 : 31 0 : using variables_tag = ::Tags::Variables<tmpl::list<Tags::U>>; 32 0 : using flux_variables = tmpl::list<Tags::U>; 33 0 : using gradient_variables = tmpl::list<>; 34 : 35 0 : using compute_volume_time_derivative_terms = TimeDerivativeTerms; 36 : 37 0 : using compute_largest_characteristic_speed = 38 : Tags::ComputeLargestCharacteristicSpeed; 39 : }; 40 : } // namespace Burgers