4
2 0 "outlet/face"
2 1 "walls/face"
2 2 "inlet/face"
3 3 "fluid"
$EndPhysicalNames
But in the $Elements section of the mesh (from line 88655), both the quad and hex elements are assigned a "physical entity number" = 0.
I think this means that in _split_fluid(), the fluid (hex) elements are getting grouped with the boundary (quad) faces.
End result is that there are no fluid elements defined after the call to _split_fluid().
Looks like the necessary element info is getting lost in translation?
Nigel