[samiam1000]

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:

./Allrun

I get this error:

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

[wyldckat]

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

[samiam1000]

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:

/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  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

/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  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

[wyldckat]

Hi Samuele,

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

1. Run Allclean:

   ./Allclean

2. Edit the file Allrun and find the following line:

   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.
3. Edit the file "system/decomposeParDict" and find this line:

   numberOfSubdomains  4;

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

   method          scotch;

4. Run Allrun once again.

Best regards,
Bruno

[samiam1000]

Hi Bruno and thanks for answering.

The steps you suggested make the tutorial work fine.

Thanks a lot,

Samuele

[jam]

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)

[wyldckat]

Greetings Alain,

Can you be a bit more specific?

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

Best regards,
Bruno

[samiam1000]

Dear Alain,

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

Than you can try to parallelize it!

Samuele

[jam]

@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.

[wyldckat]

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:

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:

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

[jam]

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.

[mukut]

In my case, the tutorial works fine, but after modifying the geometry by topoSetDict, after running Allrun script I have found following errors in log files as shown below:

log.reconstructPar

/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.2.1                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
Build  : 2.2.1-57f3c3617a2d
Exec   : reconstructPar -allRegions
Date   : Oct 16 2013
Time   : 19:53:41
Host   : "mukut-Endeavor-MR3300"
PID    : 5013
Case   : /home/mukut/OpenFOAM/mukut-2.2.1/run/tutorials/heatTransfer/chtMultiRegionFoam/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



--> FOAM FATAL ERROR: 
No times selected

    From function reconstructPar
    in file reconstructPar.C at line 178.

FOAM exiting

log.chtMultiRegionFoam

/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.2.1                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
Build  : 2.2.1-57f3c3617a2d

Exec   : chtMultiRegionFoam -parallel
Date   : Oct 16 2013
Time   : 16:15:49
Host   : "mukut-Endeavor-MR3300"
PID    : 4242
Case   : /home/mukut/OpenFOAM/mukut-2.2.1/run/tutorials/heatTransfer/chtMultiRegionFoam/multiRegionHeater
nProcs : 4
Slaves : 
3
(
"mukut-Endeavor-MR3300.4243"
"mukut-Endeavor-MR3300.4244"
"mukut-Endeavor-MR3300.4245"
)

Pstream initialized with:
    floatTransfer      : 0
    nProcsSimpleSum    : 0
    commsType          : nonBlocking
    polling iterations : 0
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


Create fluid mesh for region bottomAir for time = 0

Create fluid mesh for region topAir for time = 0

Create solid mesh for region heater for time = 0

[0] 
[0] 
[0] --> FOAM FATAL ERROR: 
[0] Cannot find file "points" in directory "heater/polyMesh" in times 0 down to constant
[0] 
[0]     From function Time::findInstance(const fileName&, const word&, const IOobject::readOption, const word&)
[0]     in file db/Time/findInstance.C at line 203.
[0] 
FOAM parallel run exiting
[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.
--------------------------------------------------------------------------
[1] 
[1] 
[1] --> FOAM FATAL ERROR: 
[1] Cannot find file "points" in directory "heater/polyMesh" in times 0 down to constant
[1] 
[1]     From function Time::findInstance(const fileName&, const word&, const IOobject::readOption, const word&)
[1]     in file db/Time/findInstance.C at line 203.
[1] 
FOAM parallel run exiting
[1] 
[2] 
[2] 
[2] --> FOAM FATAL ERROR: 
[2] Cannot find file "points" in directory "heater/polyMesh" in times 0 down to constant
[2] 
[2]     From function Time::findInstance(const fileName&, const word&, const IOobject::readOption, const word&)
[2]     in file db/Time/findInstance.C at line 203.
[2] 
FOAM parallel run exiting
[2] 
[3] 
[3] 
[3] --> FOAM FATAL ERROR: 
[3] Cannot find file "points" in directory "heater/polyMesh" in times 0 down to constant
[3] 
[3]     From function Time::findInstance(const fileName&, const word&, const IOobject::readOption, const word&)
[3]     in file db/Time/findInstance.C at line 203.
[3] 
FOAM parallel run exiting
[3] 
--------------------------------------------------------------------------
mpirun has exited due to process rank 0 with PID 4242 on
node mukut-Endeavor-MR3300 exiting without calling "finalize". This may
have caused other processes in the application to be
terminated by signals sent by mpirun (as reported here).
--------------------------------------------------------------------------
[mukut-Endeavor-MR3300:04241] 3 more processes have sent help message help-mpi-api.txt / mpi-abort
[mukut-Endeavor-MR3300:04241] Set MCA parameter "orte_base_help_aggregate" to 0 to see all help / error messages

Besides, there is no time directory inside processors 0~3 directory.

Best regards,
Mukut

[wyldckat]

Hi Mukut,

Not much information to work with. All I can guess is:

1. There is nothing to reconstruct, which is why reconstructPar gave you that message.
2. The solver is complaining about a missing mesh region. Either you:
   1. Have not updated the file that defines which regions are to be used on solid and on fluid;
   2. or something went wrong when you ran decomposePar;
   3. or you did not split up the mesh into the dedicated regions.

The output of topoSet and the content of "topoSetDict" would help understand things a bit better.

Best regards,
Bruno

[mukut]

Thank you Mr. Bruno,

I found some mistakes in fvSchemes and fvSolutions file of a region that I have created after modifying the tutorial geometry and I have corrected those. Now simulation is going on but it takes long time, I have modified the controlDict as follows to complete simulation in a shorter time...

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.2.1                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;

    location    "system";
    object      controlDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //


libs
(
    "libcompressibleTurbulenceModel.so"
    "libcompressibleRASModels.so"
);

application     chtMultiRegionFoam;

startFrom       latestTime;

startTime       0.1;

stopAt          endTime;

endTime         0.2;

deltaT          0.1;

writeControl    adjustableRunTime;

writeInterval   0.1;

purgeWrite      0;

writeFormat     binary;

writePrecision  8;

writeCompression off;

timeFormat      general;

timePrecision   6;

runTimeModifiable yes;

maxCo           0.3;

// Maximum diffusion number
maxDi           10.0;

adjustTimeStep  yes;

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

Almost 18hrs gone, now simulation time showed 0.125983 and end time is 0.2

How can I reduced the time of simulation?

Best regards,
mukut

Originally Posted by wyldckat

Hi Mukut,

Not much information to work with. All I can guess is:

1. There is nothing to reconstruct, which is why reconstructPar gave you that message.
2. The solver is complaining about a missing mesh region. Either you:
   1. Have not updated the file that defines which regions are to be used on solid and on fluid;
   2. or something went wrong when you ran decomposePar;
   3. or you did not split up the mesh into the dedicated regions.

The output of topoSet and the content of "topoSetDict" would help understand things a bit better.

Best regards,
Bruno

[wyldckat]

Originally Posted by mukut

How can I reduced the time of simulation?

Quick answer: Sorry, not enough information to work with here
Knowing the characteristics of the mesh and the solver used, as well as the contents of the "fv*" files, and how exactly you are running the case, would help.

[Ahmed Khattab]

Originally Posted by mukut

How can I reduced the time of simulation?

i have question here, your time step is 0.1s who your solver computes for time with another step ?

one way for reducing time is reducing number of cells especially in axis with small variation, then you can refine your mesh based on results of coarse mesh, you can find this method in openFoam user manual in chapter two i think.

Good Luck,

[mukut]

Thanks for reply. I have changed to steady state solver: chtMultiRegionSimpleFoam. Now it worked with my modified geometry.

[derekm]

Originally Posted by wyldckat

Hi Samuele,

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

1. Run Allclean:

   ./Allclean

2. Edit the file Allrun and find the following line:

   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.
3. Edit the file "system/decomposeParDict" and find this line:

   numberOfSubdomains  4;

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

   method          scotch;

4. Run Allrun once again.

Best regards,
Bruno

Alas not quite that simple. (t least under 2.3 with tutorials/heatTransfer/chtMultiRegionFoam/multiRegionHeater).. you need to do this for each decomposeParDict for each region as well as the top level . i.e. system/[region]/decomposeParDict and system/decomposeParDict

[Miguel.Mendez]

Originally Posted by wyldckat

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:

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:

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

Hi Bruno,

I hope you can help me.

I am running a Multiregion case. I have read the instructions in the Allrun script of this tutorial. When I descomposed my case and every single processor has taken their respective part of each region, but, when I am going to release the solver appears the following problem:

Cannot find file "points" in directory "polyMesh" in times 23.6 down to constant. (23.6 is my starting time).

I have checked that every region in every processor has the repective constant folder with the respective polyMesh/points file.

I executed this line:

mpirun -np 4 my_solver -parallel 1> runlog

Does exit an special statement for running multiRegion cases?

I hope have been clear. Best regards,

Miguel.

[ArpanS]

Cannot find file "points" in directory "polyMesh" in times 23.6 down to constant. (23.6 is my starting time).

I get the same error with decomposePar for a multi-region case, did you find any solution to this problem ?

Thanks
Arpan