1 // SPDX-FileCopyrightText: Copyright (c) 2017-2024, HONEE contributors. 2 // SPDX-License-Identifier: Apache-2.0 OR BSD-2-Clause 3 4 /// @file 5 /// Thermodynamic wave propogation for testing freestream/non-reflecting boundary conditions. Proposed in Mengaldo et. al. 2014 6 #include <ceed/types.h> 7 8 #include "newtonian_state.h" 9 #include "utils.h" 10 11 typedef struct GaussianWaveContext_ *GaussianWaveContext; 12 struct GaussianWaveContext_ { 13 CeedScalar epicenter[3]; // Location of the perturbation 14 CeedScalar width; // Controls width of the perturbation 15 CeedScalar amplitude; // Amplitude of the perturbation 16 State S_infty; // Flow state at infinity 17 struct NewtonianIdealGasContext_ newt_ctx; 18 }; 19 20 CEED_QFUNCTION_HELPER int IC_GaussianWave(void *ctx, CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out, StateVariable state_var) { 21 const CeedScalar(*X)[CEED_Q_VLA] = (const CeedScalar(*)[CEED_Q_VLA])in[0]; 22 23 CeedScalar(*q0)[CEED_Q_VLA] = (CeedScalar(*)[CEED_Q_VLA])out[0]; 24 25 const GaussianWaveContext context = (GaussianWaveContext)ctx; 26 const NewtonianIdealGasContext newt_ctx = &context->newt_ctx; 27 const NewtonianIGProperties gas = newt_ctx->gas; 28 29 const CeedScalar amplitude = context->amplitude; 30 const CeedScalar width = context->width; 31 const State S_infty = context->S_infty; 32 const CeedScalar xc = context->epicenter[0]; 33 const CeedScalar yc = context->epicenter[1]; 34 35 const CeedScalar gamma = HeatCapacityRatio(gas); 36 37 CeedPragmaSIMD for (CeedInt i = 0; i < Q; i++) { 38 CeedScalar U[5], qi[5]; 39 const CeedScalar x[3] = {X[0][i], X[1][i], X[2][i]}; 40 const CeedScalar x0 = x[0] - xc; 41 const CeedScalar y0 = x[1] - yc; 42 const CeedScalar e_kinetic = 0.5 * S_infty.U.density * Dot3(S_infty.Y.velocity, S_infty.Y.velocity); 43 44 const CeedScalar perturbation = 1 + amplitude * exp(-(Square(x0) + Square(y0)) / (2 * Square(width))); 45 46 U[0] = S_infty.U.density * perturbation; 47 U[1] = S_infty.Y.velocity[0] * U[0]; 48 U[2] = S_infty.Y.velocity[1] * U[0]; 49 U[3] = S_infty.Y.velocity[2] * U[0]; 50 U[4] = S_infty.Y.pressure / (gamma - 1) * perturbation + e_kinetic; 51 52 State initCond = StateFromU(gas, U); 53 StateToQ(gas, initCond, qi, state_var); 54 55 for (CeedInt j = 0; j < 5; j++) q0[j][i] = qi[j]; 56 } 57 58 return 0; 59 } 60 61 CEED_QFUNCTION(IC_GaussianWave_Conserv)(void *ctx, CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) { 62 return IC_GaussianWave(ctx, Q, in, out, STATEVAR_CONSERVATIVE); 63 } 64 65 CEED_QFUNCTION(IC_GaussianWave_Prim)(void *ctx, CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) { 66 return IC_GaussianWave(ctx, Q, in, out, STATEVAR_PRIMITIVE); 67 } 68 69 CEED_QFUNCTION(IC_GaussianWave_Entropy)(void *ctx, CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) { 70 return IC_GaussianWave(ctx, Q, in, out, STATEVAR_ENTROPY); 71 } 72