CFD Online Discussion Forums - chtMultiRegionFoam: problem with the tutorial

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chtMultiRegionFoam: problem with the tutorial

Dear All,

I am trying to learn to use the chtMultiRegionFoam and I am starting with the tutorial.

The 1st tutorial I wanted to run is the multiRegionHeater.

I enter the dir of the case and I give the command:

Code:

./Allrun

I get this error:

Code:

lab@lab-laptop:~/Scrivania/multiRegionHeater$ ./Allrun 

Running blockMesh on /home/lab/Scrivania/multiRegionHeater

Running topoSet on /home/lab/Scrivania/multiRegionHeater

Running splitMeshRegions on /home/lab/Scrivania/multiRegionHeater

Running chtMultiRegionFoam in parallel on /home/lab/Scrivania/multiRegionHeater using 2 processes





--> FOAM FATAL ERROR: 

No times selected



    From function reconstructPar

    in file reconstructPar.C at line 139.



FOAM exiting







--> FOAM FATAL ERROR: 

No times selected



    From function reconstructPar

    in file reconstructPar.C at line 139.



FOAM exiting







--> FOAM FATAL ERROR: 

No times selected



    From function reconstructPar

    in file reconstructPar.C at line 139.



FOAM exiting







--> FOAM FATAL ERROR: 

No times selected



    From function reconstructPar

    in file reconstructPar.C at line 139.



FOAM exiting







--> FOAM FATAL ERROR: 

No times selected



    From function reconstructPar

    in file reconstructPar.C at line 139.



FOAM exiting





creating files for paraview post-processing



created 'multiRegionHeater{bottomAir}.OpenFOAM'

created 'multiRegionHeater{topAir}.OpenFOAM'

created 'multiRegionHeater{heater}.OpenFOAM'

created 'multiRegionHeater{leftSolid}.OpenFOAM'

created 'multiRegionHeater{rightSolid}.OpenFOAM'

Do you know what's wrong and what I should do?

Also, where can I find an explanation of this solver, since I guess it is a bit difficult to set everything properly?

Thanks,

Samuele

Greetings Samuele,

The Allrun script uses a method of keeping a log of every application that is executed. If you look into the files "log.*", you should find the reason why things aren't working as expected.

As for documentation, I'm not familiar with any document online for the "chtMultiRegion*Foam" solvers, so I suggest that you search for it ;)
Failing that, start studying the files that the tutorial case has, as well as looking at the code for the solver itself.

Best regards,
Bruno

I looked at the different log files and I noticed that there are problems in the log.chtMultiRegionFoam and in the log.reconstructPar.

These are the 2 files:

Code:

/*---------------------------------------------------------------------------*\

| =========                 |                                                 |

| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |

|  \\    /   O peration     | Version:  2.1.0                                 |

|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |

|    \\/     M anipulation  |                                                 |

\*---------------------------------------------------------------------------*/

Build  : 2.1.0-0bc225064152

Exec   : chtMultiRegionFoam -parallel

Date   : Apr 05 2012

Time   : 16:55:55

Host   : "lab-laptop"

PID    : 7962

[0] --------------------------------------------------------------------------

MPI_ABORT was invoked on rank 0 in communicator MPI_COMM_WORLD 

with errorcode 1.



NOTE: invoking MPI_ABORT causes Open MPI to kill all MPI processes.

You may or may not see output from other processes, depending on

exactly when Open MPI kills them.

--------------------------------------------------------------------------



[0] 

[0] --> FOAM FATAL ERROR: 

[0] "/home/lab/Scrivania/multiRegionHeater/system/decomposeParDict" specifies 4 processors but job was started with 2 processors.

[0] 

FOAM parallel run exiting

[0] 

--------------------------------------------------------------------------

mpirun has exited due to process rank 0 with PID 7962 on

node lab-laptop exiting without calling "finalize". This may

have caused other processes in the application to be

terminated by signals sent by mpirun (as reported here).

--------------------------------------------------------------------------

and

Code:

/*---------------------------------------------------------------------------*\

| =========                 |                                                 |

| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |

|  \\    /   O peration     | Version:  2.1.0                                 |

|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |

|    \\/     M anipulation  |                                                 |

\*---------------------------------------------------------------------------*/

Build  : 2.1.0-0bc225064152

Exec   : reconstructPar -region rightSolid

Date   : Apr 05 2012

Time   : 16:55:56

Host   : "lab-laptop"

PID    : 7968

Case   : /home/lab/Scrivania/multiRegionHeater

nProcs : 1

sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).

fileModificationChecking : Monitoring run-time modified files using timeStampMaster

allowSystemOperations : Disallowing user-supplied system call operations



// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

Create time

Actually, I do have 2 processors and I don't know why it doesn't work. How can I make it run on a single processor? What I should do. Could anyone help?

Thanks a lot,

Samuele

Hi Samuele,

You didn't specify if you had changed anything in the simulation case. Anyway, here are the steps to fix things:

Run Allclean:

Code:

./Allclean
Edit the file Allrun and find the following line:

Code:

runParallel `getApplication` 4

The last number is the number of parallel processes to be used for running in parallel. Change this if you have to. I'll assume you want to use 2 processes.
Edit the file "system/decomposeParDict" and find this line:

Code:

numberOfSubdomains 4;

Change the number 4 to 2 as well, or whichever number you want to use. And keep the "method" in "scotch" mode:

Code:

method scotch;
Run Allrun once again.

Best regards,
Bruno

Hi Bruno and thanks for answering.

The steps you suggested make the tutorial work fine.

Thanks a lot,

Samuele

I does not work for me.

In the processor* directories, I don't have any time directories after the run except 0/ and constant/

processor0:
0 constant

processor1:
0 constant

processor2:
0 constant

processor3:
0 constant

All the time dir are in the base dir

0 10 20 30 Allclean Allrun ....... constant makeCellSets.setSet processor0 processor1 processor2 processor3 README.txt system

This is with Ubuntu 10.04

Everything else is ok and this was working with older version.

Any suggestions?
Thanks

This is written in a log file with mpirunDebug

*** An error occurred in MPI_Init
*** before MPI was initialized
*** MPI_ERRORS_ARE_FATAL (your MPI job will now abort)

Greetings Alain,

Can you be a bit more specific?

Are you 100% certain it's Ubuntu 10.04? Or is it 12.04?
What OpenFOAM version are you talking about? Is it 2.1.1?
Are you using the deb package version? Namely this one: http://www.openfoam.org/download/ubuntu.php ?
Are you running the tutorial case "heatTransfer/chtMultiRegionFoam/multiRegionHeater"?
What's the error message in file "log.chtMultiRegionFoam"?

Best regards,
Bruno

Dear Alain,

I suggest you to try to run the case on a single processor.

Than you can try to parallelize it!

Samuele

@wyldckat

1. It is 10.04
2. 2.1.0
3. From the deb pkg
4. All parallel tutorials give the same messages

mpirun -np 4 xxxxxx works as expected but the work is not distributed

mpirun -np 4 xxxxxx -parallel gives the error messages

I went back to the previous version 2.0.0 and everything is ok.

Hi Alain,

OK, it would be really useful to see a good log with errors, so it can be easier to diagnose the real error. Please run mpirun in a similar way to this:

Code:

mpirun -n 4 interFoam -parallel > log.interFoam 2>&1

This way the errors are also sent to the main log file. Then search and replace any sensitive data on the log.
Then compress the file:

Code:

tar -czf log.interFoam.tar.gz log.interFoam

And attach the compressed file "log.interFoam.tar.gz" to your next post.

Another thing you can look at is if there is any folder and/or file present at "~/.OpenFOAM/", which is where OpenFOAM will look for global configuration files for the user.

Best regards,
Bruno

I found the only method that works so far with my setup:

http://www.cfd-online.com/Forums/ope...12-04-lts.html

All others (2.1.1 deb pkg , 2.1.1 tgz source) are not compiling or running as they should.

Only the 2.1.x from git works flawlessly.

Thanks for the suggestions anyway.