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Fix issue #206: don't divide Laplacian_S tracer viscous reflux by rho… #260

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Merged
asalmgren merged 1 commit into from
Oct 9, 2026
Merged

Fix issue #206: don't divide Laplacian_S tracer viscous reflux by rho… #260

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8 changes: 7 additions & 1 deletion Source/NavierStokes.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1812,9 +1812,15 @@ NavierStokes::reflux ()
}
}

//
// The viscous register holds the flux of the equation that was solved:
// only RhoInverse_Laplacian_S (rho dS/dt = div beta grad S, e.g. Temp)
// needs the increment divided by rho. Laplacian_S tracers carry no rho.
//
for (int istate = AMREX_SPACEDIM; istate < NUM_STATE; istate++)
{
if (advectionType[istate] == NonConservative)
if (advectionType[istate] == NonConservative &&
diffusionType[istate] == RhoInverse_Laplacian_S)
{
MultiFab::Divide(Ssync,Rh,0,istate-AMREX_SPACEDIM,1,0);
}
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