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Fixing bug in hyper-resistivity calculation which had missing terms i… #5638

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merged 7 commits into from
Feb 4, 2025
Merged

Fixing bug in hyper-resistivity calculation which had missing terms i… #5638

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aa01df3
Fixing bug in hyper-resistivity calculation which had missing terms i…
clarkse Feb 4, 2025
829dd31
Removing trailing whitespace.
clarkse Feb 4, 2025
d988e07
Changing location of current evaluation for hyper-resistivity to brea…
clarkse Feb 4, 2025
c50a772
Update Source/FieldSolver/FiniteDifferenceSolver/HybridPICSolveE.cpp
clarkse Feb 4, 2025
f6fe9dc
adding missing semicolon
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7e4022c
Resetting Ohm's Law EM modes benchmarks for CI testing.
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Adding commas to array values for CI testing.
clarkse Feb 4, 2025
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36 changes: 28 additions & 8 deletions Source/FieldSolver/FiniteDifferenceSolver/HybridPICSolveE.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -611,9 +611,10 @@ void FiniteDifferenceSolver::HybridPICSolveECylindrical (

if (include_hyper_resistivity_term) {
// r on cell-centered point (Jr is cell-centered in r)
Real const r = rmin + (i + 0.5_rt)*dr;

auto nabla2Jr = T_Algo::Dr_rDr_over_r(Jr, r, dr, coefs_r, n_coefs_r, i, j, 0, 0);
const Real r = rmin + (i + 0.5_rt)*dr;
const Real jr_val = Interp(Jr, Jr_stag, Er_stag, coarsen, i, j, 0, 0);
auto nabla2Jr = T_Algo::Dr_rDr_over_r(Jr, r, dr, coefs_r, n_coefs_r, i, j, 0, 0)
+ T_Algo::Dzz(Jr, coefs_z, n_coefs_z, i, j, 0, 0) - jr_val/(r*r);
Er(i, j, 0) -= eta_h * nabla2Jr;
}
},
Expand All @@ -633,7 +634,7 @@ void FiniteDifferenceSolver::HybridPICSolveECylindrical (
}

// Interpolate to get the appropriate charge density in space
Real rho_val = Interp(rho, nodal, Er_stag, coarsen, i, j, 0, 0);
Real rho_val = Interp(rho, nodal, Et_stag, coarsen, i, j, 0, 0);
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Nice catch!


// Interpolate current to appropriate staggering to match E field
Real jtot_val = 0._rt;
Expand All @@ -659,7 +660,13 @@ void FiniteDifferenceSolver::HybridPICSolveECylindrical (
// Add resistivity only if E field value is used to update B
if (solve_for_Faraday) { Et(i, j, 0) += eta(rho_val, jtot_val) * Jt(i, j, 0); }

// Note: Hyper-resisitivity should be revisited here when modal decomposition is implemented
if (include_hyper_resistivity_term) {
const Real jt_val = Interp(Jt, Jt_stag, Et_stag, coarsen, i, j, 0, 0);
auto nabla2Jt = T_Algo::Dr_rDr_over_r(Jt, r, dr, coefs_r, n_coefs_r, i, j, 0, 0)
+ T_Algo::Dzz(Jt, coefs_z, n_coefs_z, i, j, 0, 0) - jt_val/(r*r);

Et(i, j, 0) -= eta_h * nabla2Jt;
}
},

// Ez calculation
Expand Down Expand Up @@ -697,7 +704,14 @@ void FiniteDifferenceSolver::HybridPICSolveECylindrical (
if (solve_for_Faraday) { Ez(i, j, 0) += eta(rho_val, jtot_val) * Jz(i, j, 0); }

if (include_hyper_resistivity_term) {
// r on nodal point (Jz is nodal in r)
Real const r = rmin + i*dr;

auto nabla2Jz = T_Algo::Dzz(Jz, coefs_z, n_coefs_z, i, j, 0, 0);
if (r > 0.5_rt*dr) {
nabla2Jz += T_Algo::Dr_rDr_over_r(Jz, r, dr, coefs_r, n_coefs_r, i, j, 0, 0);
}

Ez(i, j, 0) -= eta_h * nabla2Jz;
}
}
Expand Down Expand Up @@ -918,7 +932,9 @@ void FiniteDifferenceSolver::HybridPICSolveECartesian (
if (solve_for_Faraday) { Ex(i, j, k) += eta(rho_val, jtot_val) * Jx(i, j, k); }

if (include_hyper_resistivity_term) {
auto nabla2Jx = T_Algo::Dxx(Jx, coefs_x, n_coefs_x, i, j, k);
auto nabla2Jx = T_Algo::Dxx(Jx, coefs_x, n_coefs_x, i, j, k)
+ T_Algo::Dyy(Jx, coefs_y, n_coefs_y, i, j, k)
+ T_Algo::Dzz(Jx, coefs_z, n_coefs_z, i, j, k);
Ex(i, j, k) -= eta_h * nabla2Jx;
}
},
Expand Down Expand Up @@ -958,7 +974,9 @@ void FiniteDifferenceSolver::HybridPICSolveECartesian (
if (solve_for_Faraday) { Ey(i, j, k) += eta(rho_val, jtot_val) * Jy(i, j, k); }

if (include_hyper_resistivity_term) {
auto nabla2Jy = T_Algo::Dyy(Jy, coefs_y, n_coefs_y, i, j, k);
auto nabla2Jy = T_Algo::Dxx(Jy, coefs_x, n_coefs_x, i, j, k)
+ T_Algo::Dyy(Jy, coefs_y, n_coefs_y, i, j, k)
+ T_Algo::Dzz(Jy, coefs_z, n_coefs_z, i, j, k);
Ey(i, j, k) -= eta_h * nabla2Jy;
}
},
Expand Down Expand Up @@ -998,7 +1016,9 @@ void FiniteDifferenceSolver::HybridPICSolveECartesian (
if (solve_for_Faraday) { Ez(i, j, k) += eta(rho_val, jtot_val) * Jz(i, j, k); }

if (include_hyper_resistivity_term) {
auto nabla2Jz = T_Algo::Dzz(Jz, coefs_z, n_coefs_z, i, j, k);
auto nabla2Jz = T_Algo::Dxx(Jz, coefs_x, n_coefs_x, i, j, k)
+ T_Algo::Dyy(Jz, coefs_y, n_coefs_y, i, j, k)
+ T_Algo::Dzz(Jz, coefs_z, n_coefs_z, i, j, k);
Ez(i, j, k) -= eta_h * nabla2Jz;
}
}
Expand Down
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