Alsvinn  0.5.3
The fast FVM simulator with UQ support
ScalarEntropyConservativeFlux.hpp
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1 /* Copyright (c) 2018 ETH Zurich, Kjetil Olsen Lye
2  * This program is free software: you can redistribute it and/or modify
3  * it under the terms of the GNU General Public License as published by
4  * the Free Software Foundation, either version 3 of the License, or
5  * (at your option) any later version.
6  *
7  * This program is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10  * GNU General Public License for more details.
11  *
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13  * along with this program. If not, see <http://www.gnu.org/licenses/>.
14  */
15 
16 #pragma once
17 #include "alsfvm/types.hpp"
19 namespace alsfvm {
20 namespace numflux {
21 
30 template<class Equation>
32 public:
36  static const std::string name;
37 
38  template<int direction>
39  __device__ __host__ inline static real computeFlux(const Equation& eq,
40  const typename Equation::AllVariables& left,
41  const typename Equation::AllVariables& right,
42  typename Equation::ConservedVariables& F) {
43  auto leftEntropyVariable = eq.computeEntropyVariables(left);
44  auto rightEntropyVariable = eq.computeEntropyVariables(right);
45 
46  if (left.u ==
47  right.u) {// || (leftEntropyVariable - rightEntropyVariable).norm() < 1e-6) {
48  eq.template computePointFlux<direction>(left, F);
49  } else {
50  auto leftEntropyPotential = eq.computeEntropyPotential(left);
51  auto rightEntropyPotential = eq.computeEntropyPotential(right);
52 
53  F.u = ((rightEntropyPotential - leftEntropyPotential) /
54  (rightEntropyVariable - leftEntropyVariable));
55  }
56 
57  return fmax(eq.template computeWaveSpeed<direction>(left, left),
58  eq.template computeWaveSpeed<direction>(right, right));
59  }
60 };
61 } // namespace numflux
62 } // namespace alsfvm
#define __host__
Definition: types.hpp:46
static const std::string name
name is "tecno1"
Definition: ScalarEntropyConservativeFlux.hpp:36
double real
Definition: types.hpp:65
__device__ static __host__ real computeFlux(const Equation &eq, const typename Equation::AllVariables &left, const typename Equation::AllVariables &right, typename Equation::ConservedVariables &F)
Definition: ScalarEntropyConservativeFlux.hpp:39
#define __device__
Definition: types.hpp:45
Various utility functions to implement the tecno flux.
Definition: types.hpp:30
Definition: ScalarEntropyConservativeFlux.hpp:31