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fix axis current regularisation along the south pole #333

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Merged
glesur merged 1 commit into from
Apr 16, 2025
Merged

fix axis current regularisation along the south pole #333

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4 changes: 2 additions & 2 deletions src/fluid/boundary/axis.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -128,12 +128,12 @@ void Axis::RegularizeCurrentSide(int side) {
real deltaPhi = data->mygrid->xend[KDIR] - data->mygrid->xbeg[KDIR];

// Use the circulation around the pole of Bphi to determine Jr on the pole:
// Delta phi r^2(1-cos theta) Jr = int r sin(theta) Bphi dphi
// 1/2*Delta phi r^2 sin theta^2 Jr = int r sin(theta) Bphi dphi

idefix_for("fixJ",0,data->np_tot[KDIR],0,data->np_tot[IDIR],
KOKKOS_LAMBDA(int k,int i) {
real th = x2(jc);
real fact = sign*sin(th)/(deltaPhi*x1(i)*(1-cos(th)));
real fact = 2*sign/(deltaPhi*x1(i)*sin(th));
J(IDIR, k,js,i) = BAvg(i)*fact;
});

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