I am facing FATAL Error: There are no standard fluid cells in the computation. Please verify geometry and mesh settings. If using an STL file to define the geometry, this may be due to normal vectors pointing in the wrong direction

MFiX
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Please select the most relevant MFiX category: | Installation | How to | Bug report | Share | for this topic. FATAL Error: There are no standard fluid cells in the computation.

Please verify geometry and mesh settings.

If using an STL file to define the geometry, this may be due to

normal vectors pointing in the wrong direction.

[* List item](/home/mahendra/Pictures/Screenshots/Screenshot from 2025-06-04 11-23-43.png)

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Please see this post for instructions on how to submit a help request

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I am also getting similar error, recommendations on how to fix it? Using MFiX 24.4 on Mac.

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Did you check that the normals are pointing in the right direction?

If that’s not the problem, we cannot help you without seeing your simulation. Please see the post linked above for instructions on how to submit a help request.

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thanks, problem has been solved.

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How did you end up solving it? What tool did you use to fix your mesh?

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by using flip normal tool.