pisoFoam, localEuler

giorgianig · April 27, 2023, 08:57

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?

Tobermory · April 28, 2023, 08:02

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.

April 27, 2023, 08:57	pisoFoam, localEuler	#1
giorgianig Member Giorgio Join Date: Mar 2023 Posts: 41 Rep Power: 2	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?

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Differences in solution method for pisoFoam and buoyantBoussinesqPisoFoam	mchurchf	OpenFOAM	7	August 6, 2023 10:12
pisoFoam OF4 vs OF8	mattiafc	OpenFOAM Programming & Development	1	March 22, 2021 14:33
pisoFoam and pimpleFoam are unstable in foam-extend 4.0/4.1 (misunderstanding ?)	Kombinator	OpenFOAM Running, Solving & CFD	4	January 14, 2021 05:10
PisoFoam error: mpirun Exit Code	Jinjolee	OpenFOAM	3	April 29, 2019 08:10
pisoFoam compiling error with OF 1.7.1 on MAC OSX	Greg Givogue	OpenFOAM Programming & Development	3	March 4, 2011 18:18

April 28, 2023, 08:02		#2
Tobermory Senior Member Join Date: Apr 2020 Location: UK Posts: 564 Rep Power: 12	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.