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Transport volume fractions in the LF solver #2050

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Transport volume fractions in the LF solver #2050

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d887661
Transport volume fractions in the LF solver
aliencaocao Oct 13, 2026
6f33861
Merge branch 'master' into fix/lf-interface-velocity
sbryngelson Oct 14, 2026
f0ed089
Merge branch 'master' into fix/lf-interface-velocity
wilfonba Oct 14, 2026
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11 changes: 6 additions & 5 deletions src/simulation/m_riemann_solver_lf.fpp
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Original file line number Diff line number Diff line change
Expand Up @@ -272,11 +272,12 @@ contains
! Advection flux and source: interface velocity for volume fraction transport
$:GPU_LOOP(parallelism='[seq]')
do i = eqn_idx%adv%beg, eqn_idx%adv%end
flux_rsx_vf(${SF('')}$, i) = (qL_prim_rsx_vf(${SF('')}$, i) - qR_prim_rsx_vf(${SF(' + 1')}$, &
& i))*s_M*s_P/(s_M - s_P)
flux_src_rsx_vf(${SF('')}$, i) = (s_M*qR_prim_rsx_vf(${SF(' + 1')}$, &
& i) - s_P*qL_prim_rsx_vf(${SF('')}$, i))/(s_M - s_P)
flux_rsx_vf(${SF('')}$, i) = (s_M*qR_prim_rsx_vf(${SF(' + 1')}$, &
& i)*vel_R(norm_dir) - s_P*qL_prim_rsx_vf(${SF('')}$, &
& i)*vel_L(norm_dir) + s_M*s_P*(qL_prim_rsx_vf(${SF('')}$, &
& i) - qR_prim_rsx_vf(${SF(' + 1')}$, i)))/(s_M - s_P)
end do
flux_src_rsx_vf(${SF('')}$, eqn_idx%adv%beg) = (s_M*vel_R(norm_dir) - s_P*vel_L(norm_dir))/(s_M - s_P)

if (bubbles_euler) then
! From HLLC: Kills mass transport @ bubble gas density
Expand Down Expand Up @@ -311,7 +312,7 @@ contains
! Geometrical source of the void fraction(s) is zero
$:GPU_LOOP(parallelism='[seq]')
do i = eqn_idx%adv%beg, eqn_idx%adv%end
flux_gsrc_rsx_vf(${SF('')}$, i) = flux_rsx_vf(${SF('')}$, i)
flux_gsrc_rsx_vf(${SF('')}$, i) = 0._wp
end do
end if
#:endif
Expand Down
134 changes: 90 additions & 44 deletions tests/27B24CD9/golden-metadata.txt
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