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pisoFoam, localEuler

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Old   April 27, 2023, 08:57
Default pisoFoam, localEuler
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Giorgio
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I am trying to obtain a steady state solution of a turbulent case (k-omegaSST). In order to start the simulation with a decent solution, previously to my SS attemps, I run a transient simulation for a quite long time. Then I started my SS solution:



I tried simpleFoam but the simulation crashes at the second step.



Then I tried pisoFoam with localEuler but I get the following error:



Code:

Courant Number mean: 0.0248068 max: 0.582525
[0]
[0]
[0] --> FOAM FATAL ERROR: (openfoam-2212)
[0]
failed lookup of rDeltaT (objectRegistry region0) available objects of type volScalarField:
6(nut yWall k nu p omega)
[0]
[0]
[0]     From const Type& Foam::objectRegistry::lookupObject(const Foam::word&, bool) const [with Type = Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>]  

[0]     in file /usr/src/packages/BUILD/src/OpenFOAM/lnInclude/objectRegistryTemplates.C at line 571. 

[0]
FOAM parallel run exiting
[0]

Can somebody explain me how to provide rDeltaT?
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Old   April 28, 2023, 08:02
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Try use pimpleFoam instead of pisoFoam ... pisoFoam is for time accurate transient simulations. If your simpleFoam run is crashing on iter 2, then you either need a better starting guess and/or you need to underrelax more.
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