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Fix z-boundary backward FD stencil using fields(2) instead of fields(3) #1173

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Fix z-boundary backward FD stencil using fields(2) instead of fields(3) #1173

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2 changes: 1 addition & 1 deletion src/common/m_finite_differences.fpp
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Original file line number Diff line number Diff line change
Expand Up @@ -50,7 +50,7 @@ contains
if (z == iz_s%beg) then
divergence = divergence + (-3._wp*fields(3)%sf(x, y, z) + 4._wp*fields(3)%sf(x, y, z + 1) - fields(3)%sf(x, y, z + 2))/(z_cc(z + 2) - z_cc(z))
else if (z == iz_s%end) then
divergence = divergence + (+3._wp*fields(3)%sf(x, y, z) - 4._wp*fields(3)%sf(x, y, z - 1) + fields(2)%sf(x, y, z - 2))/(z_cc(z) - z_cc(z - 2))
divergence = divergence + (+3._wp*fields(3)%sf(x, y, z) - 4._wp*fields(3)%sf(x, y, z - 1) + fields(3)%sf(x, y, z - 2))/(z_cc(z) - z_cc(z - 2))
else
divergence = divergence + (fields(3)%sf(x, y, z + 1) - fields(3)%sf(x, y, z - 1))/(z_cc(z + 1) - z_cc(z - 1))
end if
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