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[WIP] Implement finite difference solver with user-input custom stencil coefficients #5433

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[WIP] Implement finite difference solver with user-input custom stencil coefficients #5433

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3337509
Start implementation
RemiLehe Oct 30, 2024
7b11731
Calling new stencils in EvolveE and EvolveB
RemiLehe Oct 30, 2024
61f2c49
added updated Dy and Dz
Oct 31, 2024
785a493
Add stencil coeffs
RemiLehe Nov 7, 2024
ba5fb06
update stencil
RemiLehe Nov 20, 2024
a671e3e
added custom coefficient work so far. Not done
Jan 29, 2025
8c90dc5
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Jan 29, 2025
ac419e7
3d implementation of custom stenciil. TODO 2d and 1d
Feb 20, 2025
0e440de
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Feb 20, 2025
f5c8e25
Merge branch 'development' into custom_coef_solver
RemiLehe Mar 3, 2025
b605866
Merge branch 'custom_coef_solver' of github.com:cdmccombs/WarpX into …
RemiLehe Mar 3, 2025
16c50ac
calculate stencil coefs notebook
Mar 4, 2025
6379dbe
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Mar 4, 2025
6086624
Fix compilation
RemiLehe Mar 8, 2025
867da7c
Merge branch 'development' into custom_coef_solver
RemiLehe Mar 8, 2025
7b07837
Add new test
RemiLehe Mar 8, 2025
f0f7106
Go back to Yee
RemiLehe Mar 8, 2025
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10 changes: 10 additions & 0 deletions Examples/Tests/langmuir/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -409,3 +409,13 @@ if(WarpX_FFT)
OFF # dependency
)
endif()

add_warpx_test(
test_3d_langmuir_multi_customcoef # name
3 # dims
2 # nprocs
inputs_test_3d_langmuir_multi_customcoef # inputs
"analysis_3d.py diags/diag1000040" # analysis
"analysis_default_regression.py --path diags/diag1000040" # checksum
OFF # dependency
)
13 changes: 13 additions & 0 deletions Examples/Tests/langmuir/inputs_test_3d_langmuir_multi_customcoef
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@@ -0,0 +1,13 @@
# base input parameters
FILE = inputs_base_3d

algo.maxwell_solver = customcoef

algo.custom_coef_upward_stencil_z = 1 0
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TODO: Switch to customized coefficients

algo.custom_coef_downward_stencil_z = 1 0

algo.custom_coef_upward_stencil_x = 1 0
algo.custom_coef_downward_stencil_x = 1 0

algo.custom_coef_upward_stencil_y = 1 0
algo.custom_coef_downward_stencil_y = 1 0
3 changes: 3 additions & 0 deletions Source/Evolve/WarpXComputeDt.cpp
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Expand Up @@ -7,6 +7,7 @@
#include "WarpX.H"

#ifndef WARPX_DIM_RZ
# include "FieldSolver/FiniteDifferenceSolver/FiniteDifferenceAlgorithms/CartesianCustomCoefAlgorithm.H"
# include "FieldSolver/FiniteDifferenceSolver/FiniteDifferenceAlgorithms/CartesianCKCAlgorithm.H"
# include "FieldSolver/FiniteDifferenceSolver/FiniteDifferenceAlgorithms/CartesianNodalAlgorithm.H"
# include "FieldSolver/FiniteDifferenceSolver/FiniteDifferenceAlgorithms/CartesianYeeAlgorithm.H"
Expand Down Expand Up @@ -85,6 +86,8 @@ WarpX::ComputeDt ()
deltat = cfl * CartesianYeeAlgorithm::ComputeMaxDt(dx);
} else if (electromagnetic_solver_id == ElectromagneticSolverAlgo::CKC) {
deltat = cfl * CartesianCKCAlgorithm::ComputeMaxDt(dx);
} else if (electromagnetic_solver_id == ElectromagneticSolverAlgo::CustomCoef) {
deltat = cfl * CartesianCustomCoefAlgorithm::ComputeMaxDt(dx);
#endif
} else {
WARPX_ABORT_WITH_MESSAGE("ComputeDt: Unknown algorithm");
Expand Down
6 changes: 6 additions & 0 deletions Source/FieldSolver/FiniteDifferenceSolver/EvolveB.cpp
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Expand Up @@ -11,6 +11,7 @@
#ifndef WARPX_DIM_RZ
# include "FiniteDifferenceAlgorithms/CartesianYeeAlgorithm.H"
# include "FiniteDifferenceAlgorithms/CartesianCKCAlgorithm.H"
# include "FiniteDifferenceAlgorithms/CartesianCustomCoefAlgorithm.H"
# include "FiniteDifferenceAlgorithms/CartesianNodalAlgorithm.H"
#else
# include "FiniteDifferenceAlgorithms/CylindricalYeeAlgorithm.H"
Expand Down Expand Up @@ -107,6 +108,11 @@ void FiniteDifferenceSolver::EvolveB (
} else if (m_fdtd_algo == ElectromagneticSolverAlgo::CKC) {

EvolveBCartesian <CartesianCKCAlgorithm> ( Bfield, Efield, Gfield, lev, dt );

} else if (m_fdtd_algo == ElectromagneticSolverAlgo::CustomCoef) {

EvolveBCartesian <CartesianCustomCoefAlgorithm> ( Bfield, Efield, Gfield, lev, dt );

} else if (m_fdtd_algo == ElectromagneticSolverAlgo::ECT) {
EvolveBCartesianECT(Bfield, face_areas, area_mod, ECTRhofield, Venl, flag_info_cell,
borrowing, lev, dt);
Expand Down
5 changes: 5 additions & 0 deletions Source/FieldSolver/FiniteDifferenceSolver/EvolveE.cpp
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Expand Up @@ -10,6 +10,7 @@
#ifndef WARPX_DIM_RZ
# include "FieldSolver/FiniteDifferenceSolver/FiniteDifferenceAlgorithms/CartesianYeeAlgorithm.H"
# include "FieldSolver/FiniteDifferenceSolver/FiniteDifferenceAlgorithms/CartesianCKCAlgorithm.H"
# include "FieldSolver/FiniteDifferenceSolver/FiniteDifferenceAlgorithms/CartesianCustomCoefAlgorithm.H"
# include "FieldSolver/FiniteDifferenceSolver/FiniteDifferenceAlgorithms/CartesianNodalAlgorithm.H"
#else
# include "FieldSolver/FiniteDifferenceSolver/FiniteDifferenceAlgorithms/CylindricalYeeAlgorithm.H"
Expand Down Expand Up @@ -91,6 +92,10 @@ void FiniteDifferenceSolver::EvolveE (

EvolveECartesian <CartesianCKCAlgorithm> ( Efield, Bfield, Jfield, eb_update_E, Ffield, lev, dt );

} else if (m_fdtd_algo == ElectromagneticSolverAlgo::CustomCoef) {

EvolveECartesian <CartesianCustomCoefAlgorithm> ( Efield, Bfield, Jfield, eb_update_E, Ffield, lev, dt );

#endif
} else {
WARPX_ABORT_WITH_MESSAGE("EvolveE: Unknown algorithm");
Expand Down
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