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*.relax() in bubbleFoam (piso)?

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Old   February 24, 2012, 16:42
Default *.relax() in bubbleFoam (piso)?
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Jeong Kim
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I don't understand what the role of .relax() is in the bubbleFoam.

UEqns.H:

UaEqn.relax()

pEqns.H:
p.relax()

alphaEqn.H
alpha.relax()

Does .relax() mean a relaxation factor? the bubbleFoam solver used in OF1.7 adopts the "PISO" algorithm. This algorithm does not need any relaxation factor for solving U, alpha and p. Please enlighten me with you comments. Thanks.
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Old   February 28, 2012, 03:33
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Rob
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If you use PIMPLE you can use relaxation factors. The PISO algorithm (in my opinion) does not have the possibility of relaxation in bubbleFOAM.

So if nOuterCorrectors is > 1 you use PIMPLE and additionally you can optionally use relaxation.
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Old   February 28, 2012, 11:41
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Jeong Kim
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I'm using OF 1.7.1 so the bubbleFoam solver adopts "PISO". Do you mean p.relax()/UaEqn.relax()/alpha.relax() do nothing?
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