Unstructured grid mesh in openfoam

tjwldhks79 · January 18, 2024, 05:42

In a structured grid, we can assign alpha values in the 0 file to distinguish phases since we know the number of each cell. However, if we generate an unstructured grid using another tool and import it, where each cell exists (e.g., a tetrahedral mesh), is it possible to assign alpha values in a similar manner to differentiate phases?

Thanks.

Tobermory · January 19, 2024, 07:20

If the phase definition geometry is simple, then just use the setFields utility to define the alphas. If the definition is more complex, then something like swak4Foam coded may help, or use the coded functionality. Finally, if you can't define the phase distribution analytically (eg it comes from a different precursor simulation) then you will need to map/interpolate the data onto the cell centres for your new mesh.

January 18, 2024, 05:42	Unstructured grid mesh in openfoam	#1
tjwldhks79 New Member eddy Join Date: Jan 2024 Posts: 24 Rep Power: 2	In a structured grid, we can assign alpha values in the 0 file to distinguish phases since we know the number of each cell. However, if we generate an unstructured grid using another tool and import it, where each cell exists (e.g., a tetrahedral mesh), is it possible to assign alpha values in a similar manner to differentiate phases? Thanks.

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January 19, 2024, 07:20		#2
Tobermory Senior Member Join Date: Apr 2020 Location: UK Posts: 747 Rep Power: 14	If the phase definition geometry is simple, then just use the setFields utility to define the alphas. If the definition is more complex, then something like swak4Foam coded may help, or use the coded functionality. Finally, if you can't define the phase distribution analytically (eg it comes from a different precursor simulation) then you will need to map/interpolate the data onto the cell centres for your new mesh.