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34 lines
1.1 KiB
Plaintext
34 lines
1.1 KiB
Plaintext
/*
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This file implements the Lax-Wendroff flux
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Copyright (C) 2016, 2017, 2018 SINTEF ICT
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* Richtmeyer / Two-step Lax-Wendroff flux (Toro 2001, p 164)
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*/
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__device__ float3 LxW2_1D_flux(const float3 Q_l, const float3 Q_r, const float g_, const float dx_, const float dt_) {
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const float3 F_l = F_func(Q_l, g_);
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const float3 F_r = F_func(Q_r, g_);
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const float3 Q_lw2 = 0.5f*(Q_l + Q_r) + (dt_/(2.0f*dx_))*(F_l - F_r);
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return F_func(Q_lw2, g_);
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}
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