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Merged
alisagk merged 2 commits into from
Jul 17, 2025
Merged

Dev/small angle #127

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7911a94
removed the small angle adjustment
alisagk Jul 17, 2025
7d89d5c
fixed ranges for aux calculation (does not matter for current BC unde…
alisagk Jul 17, 2025
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6 changes: 5 additions & 1 deletion src/engines/grpic.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -840,8 +840,12 @@ namespace ntt {
if constexpr (M::Dim == Dim::_2D) {
if (domain.mesh.flds_bc_in({ 0, +1 }) == FldsBC::AXIS) {
range = CreateRangePolicy<Dim::_2D>(
{ domain.mesh.i_min(in::x1), domain.mesh.i_min(in::x2) },
{ domain.mesh.i_min(in::x1) - 1, domain.mesh.i_min(in::x2) },
{ domain.mesh.i_max(in::x1), domain.mesh.i_max(in::x2) + 1 });
} else {
range = CreateRangePolicy<Dim::_2D>(
{ domain.mesh.i_min(in::x1) - 1, domain.mesh.i_min(in::x2) },
{ domain.mesh.i_max(in::x1), domain.mesh.i_max(in::x2) });
}
} else if constexpr (M::Dim == Dim::_3D) {
raise::Error("Invalid dimension", HERE);
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27 changes: 7 additions & 20 deletions src/metrics/qkerr_schild.h
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Original file line number Diff line number Diff line change
Expand Up @@ -39,7 +39,6 @@ namespace metric {
const real_t chi_min, eta_min, phi_min;
const real_t dchi, deta, dphi;
const real_t dchi_inv, deta_inv, dphi_inv;
const bool small_angle;

Inline auto Delta(const real_t& r) const -> real_t {
return SQR(r) - TWO * r + SQR(a);
Expand Down Expand Up @@ -90,8 +89,7 @@ namespace metric {
, dphi { (x3_max - phi_min) / nx3 }
, dchi_inv { ONE / dchi }
, deta_inv { ONE / deta }
, dphi_inv { ONE / dphi }
, small_angle { eta2theta(HALF * deta) < constant::SMALL_ANGLE } {
, dphi_inv { ONE / dphi } {
set_dxMin(find_dxMin());
}

Expand Down Expand Up @@ -487,23 +485,12 @@ namespace metric {
*/
Inline auto polar_area(const real_t& x1) const -> real_t {
if constexpr (D != Dim::_1D) {
if (small_angle) {
const real_t dtheta = eta2theta(HALF * deta);
return dchi * math::exp(x1 * dchi + chi_min) *
(SQR(r0 + math::exp(x1 * dchi + chi_min)) + SQR(a)) *
math::sqrt(
ONE + TWO * (r0 + math::exp(x1 * dchi + chi_min)) /
(SQR(r0 + math::exp(x1 * dchi + chi_min)) + SQR(a))) *
(static_cast<real_t>(48) - SQR(dtheta)) * SQR(dtheta) /
static_cast<real_t>(384);
} else {
return dchi * math::exp(x1 * dchi + chi_min) *
(SQR(r0 + math::exp(x1 * dchi + chi_min)) + SQR(a)) *
math::sqrt(
ONE + TWO * (r0 + math::exp(x1 * dchi + chi_min)) /
(SQR(r0 + math::exp(x1 * dchi + chi_min)) + SQR(a))) *
(ONE - math::cos(eta2theta(HALF * deta)));
}
return dchi * math::exp(x1 * dchi + chi_min) *
(SQR(r0 + math::exp(x1 * dchi + chi_min)) + SQR(a)) *
math::sqrt(
ONE + TWO * (r0 + math::exp(x1 * dchi + chi_min)) /
(SQR(r0 + math::exp(x1 * dchi + chi_min)) + SQR(a))) *
(ONE - math::cos(eta2theta(HALF * deta)));
}
}

Expand Down