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Define fixed flow rate fan? Cannot cyclic and fixed value?

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Old   August 26, 2022, 22:39
Default Define fixed flow rate fan? Cannot cyclic and fixed value?
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Hello Foamers,

I need a help to define a fixed flow rate fan (equal to fixed velocity). In normal Fan, we define a cyclic plane, in U and T field just use cyclic, and pressure uses a fan BC which based on fixedJump ( cyclic jump), and fan BC will based on PU curve and patch velocity to tune pressure.

However, in fixed rate fan, it needs to keep the velocity same on master and slave side. So I want to do U with fixedValue e.g. (1 0 0) on both master and slave side, p and T use cyclic. But openfoam not happy to mix patch and cyclic.

It will shows following ERROR:

--> FOAM FATAL IO ERROR: (openfoam-2012)
inconsistent patch and patchField types for
patch type cyclic and patchField type fixedValue

Could anyone give any suggestions?

Cheers,
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