rhoCentralFoam tutorial Courant nan

gcordobaguerrero · August 27, 2017, 13:01

Hello,

I installed openFoam 4.0 from Debian repository.
First, the examples did not run properly. Thus, I downloaded the tutorial from the openFoam site repository for the 4.0 version. At least the incompressible cavity example ran ok.

However, when the compressible rhoCentralFoam was tested with shocktube example, it reports inmediatelly:
---------
Mean and max Courant Numbers = nan nan
deltaT = 1.19904e-06
Time = 1.19904e-06
---------
The program then runs each of the time step with nan on each of the variables.

Any idea?

gcordobaguerrero · August 27, 2017, 13:16

Hi, perhaps this helps:

The example "prism" within compressible/sonicFoam/ras works fine.
Whereas the "shocktube" example within compressible/sonicFoam/laminar result in a similar error that the one reported in rhoCantralFoam:
---------------------
Creating turbulence model

Selecting turbulence model type laminar
Creating field kinetic energy K

No MRF models present

No finite volume options present

Starting time loop

Time = 1e-05

Courant Number mean: nan max: nan
----------------------------

gcordobaguerrero · August 27, 2017, 13:37

Fixed!

I did not know that setFields command must be run before typing rhoCentralFoam

I suggest that tutorials should have at least a minimalistic README

tomf · August 28, 2017, 06:11

Hi,

Most tutorials have a Allrun script that shows the steps. I think those show the general way to run a particular tutorial. If there is no Allrun script it probably is just blockMesh and then the solver.

In OpenFOAM 4.x there is at least a script that shows that setFields is needed for the shocktube tutorial. Not sure if it was missing in OpenFOAM 4.0, but I think it would not need a README in this case.

Regards,
Tom

August 27, 2017, 13:01	rhoCentralFoam tutorial Courant nan	#1
gcordobaguerrero New Member Gustavo Cordoba Join Date: Aug 2017 Location: Pasto, Colombia Posts: 9 Rep Power: 9	Hello, I installed openFoam 4.0 from Debian repository. First, the examples did not run properly. Thus, I downloaded the tutorial from the openFoam site repository for the 4.0 version. At least the incompressible cavity example ran ok. However, when the compressible rhoCentralFoam was tested with shocktube example, it reports inmediatelly: --------- Mean and max Courant Numbers = nan nan deltaT = 1.19904e-06 Time = 1.19904e-06 --------- The program then runs each of the time step with nan on each of the variables. Any idea?

August 27, 2017, 13:16	test with sonicFoam	#2
gcordobaguerrero New Member Gustavo Cordoba Join Date: Aug 2017 Location: Pasto, Colombia Posts: 9 Rep Power: 9	Hi, perhaps this helps: The example "prism" within compressible/sonicFoam/ras works fine. Whereas the "shocktube" example within compressible/sonicFoam/laminar result in a similar error that the one reported in rhoCantralFoam: --------------------- Creating turbulence model Selecting turbulence model type laminar Creating field kinetic energy K No MRF models present No finite volume options present Starting time loop Time = 1e-05 Courant Number mean: nan max: nan ----------------------------

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August 27, 2017, 13:37		#3
gcordobaguerrero New Member Gustavo Cordoba Join Date: Aug 2017 Location: Pasto, Colombia Posts: 9 Rep Power: 9	Fixed! I did not know that setFields command must be run before typing rhoCentralFoam I suggest that tutorials should have at least a minimalistic README

August 28, 2017, 06:11		#4
tomf Senior Member Tom Fahner Join Date: Mar 2009 Location: Breda, Netherlands Posts: 647 Rep Power: 32	Hi, Most tutorials have a Allrun script that shows the steps. I think those show the general way to run a particular tutorial. If there is no Allrun script it probably is just blockMesh and then the solver. In OpenFOAM 4.x there is at least a script that shows that setFields is needed for the shocktube tutorial. Not sure if it was missing in OpenFOAM 4.0, but I think it would not need a README in this case. Regards, Tom