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Old   July 18, 2014, 14:20
Default Parallel Running With Problems
  #1
New Member
 
Join Date: Jan 2013
Location: Lisboa-Funchal
Posts: 23
Rep Power: 13
guilha is on a distinguished road
Good afternoon everyone,

I am running a simulation, LES with cyclic boundaries conditions.
When I run in single processor it works fine, however if I decompose the problem into 16 processors I get this error

Code:
/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.0.1                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
Build  : 2.0.1-51f1de99a4bc
Exec   : rhoCentralFoam -parallel
Date   : Jul 18 2014
Time   : 18:09:33
Host   : g01
PID    : 18279
Case   : /home/guilha/cavidade_LES_b2_cortada_quarto_circulo
nProcs : 16
Slaves : 
15
(
g01.18280
g01.18281
g01.18282
g01.18283
g01.18284
g01.18285
g01.18286
g01.18287
g01.18288
g01.18289
g01.18290
g01.18291
g01.18292
g01.18293
g01.18294
)

Pstream initialized with:
    floatTransfer     : 0
    nProcsSimpleSum   : 0
    commsType         : nonBlocking
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 mesh for time = 0

[3] #0  Foam::error::printStack(Foam::Ostream&)[10] #0  Foam::error::printStack(Foam::Ostream&)[11] #0  Foam::error::printStack(Foam::Ostream&)--------------------------------------------------------------------------
An MPI process has executed an operation involving a call to the
"fork()" system call to create a child process.  Open MPI is currently
operating in a condition that could result in memory corruption or
other system errors; your MPI job may hang, crash, or produce silent
data corruption.  The use of fork() (or system() or other calls that
create child processes) is strongly discouraged.  

The process that invoked fork was:

  Local host:          g01 (PID 18282)
  MPI_COMM_WORLD rank: 3

If you are *absolutely sure* that your application will successfully
and correctly survive a call to fork(), you may disable this warning
by setting the mpi_warn_on_fork MCA parameter to 0.
--------------------------------------------------------------------------
[15] #0  Foam::error::printStack(Foam::Ostream&) in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[3] #1  Foam::sigSegv::sigHandler(int) in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[10] #1  Foam::sigSegv::sigHandler(int) in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[15] #1  Foam::sigSegv::sigHandler(int) in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[11] #1  Foam::sigSegv::sigHandler(int) in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[3] #2   in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[10] #2   in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[11] #2   in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[15] #2   in "/lib/x86_64-linux-gnu/libc.so.6"
[3] #3  Foam::processorPolyPatch::updateMesh(Foam::PstreamBuffers&) in "/lib/x86_64-linux-gnu/libc.so.6"
[10] #3  Foam::processorPolyPatch::updateMesh(Foam::PstreamBuffers&) in "/lib/x86_64-linux-gnu/libc.so.6"
[11] #3  Foam::processorPolyPatch::updateMesh(Foam::PstreamBuffers&) in "/lib/x86_64-linux-gnu/libc.so.6"
[15] #3  Foam::processorPolyPatch::updateMesh(Foam::PstreamBuffers&) in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[3] #4  Foam::polyBoundaryMesh::updateMesh() in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[10] #4  Foam::polyBoundaryMesh::updateMesh() in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[11] #4  Foam::polyBoundaryMesh::updateMesh() in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[15] #4  Foam::polyBoundaryMesh::updateMesh() in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[3] #5  Foam::polyMesh::polyMesh(Foam::IOobject const&) in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[10] #5  Foam::polyMesh::polyMesh(Foam::IOobject const&) in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[11] #5  Foam::polyMesh::polyMesh(Foam::IOobject const&) in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[15] #5  Foam::polyMesh::polyMesh(Foam::IOobject const&) in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[3] #6   in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[10] #6  Foam::fvMesh::fvMesh(Foam::IOobject const&)Foam::fvMesh::fvMesh(Foam::IOobject const&) in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[11] #6  Foam::fvMesh::fvMesh(Foam::IOobject const&) in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
[15] #6  Foam::fvMesh::fvMesh(Foam::IOobject const&) in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libfiniteVolume.so"
[3] #7   in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libfiniteVolume.so"
[10] #7  

 in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libfiniteVolume.so"
[11] #7   in "/opt/openfoam201/platforms/linux64GccDPOpt/lib/libfiniteVolume.so"
[15] #7  
[3]  in "/opt/openfoam201/platforms/linux64GccDPOpt/bin/rhoCentralFoam"
[3] #8  __libc_start_main[10]  in "/opt/openfoam201/platforms/linux64GccDPOpt/bin/rhoCentralFoam"
[10] #8  __libc_start_main
 in "/lib/x86_64-linux-gnu/libc.so.6"
[3] #9  [11]  in "/opt/openfoam201/platforms/linux64GccDPOpt/bin/rhoCentralFoam"
[11] #8  __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
[10] #9  [15]  in "/opt/openfoam201/platforms/linux64GccDPOpt/bin/rhoCentralFoam"
[15] #8  __libc_start_main
 in "/lib/x86_64-linux-gnu/libc.so.6"
[11] #9  
 in "/lib/x86_64-linux-gnu/libc.so.6"
[15] #9  [3]  in "/opt/openfoam201/platforms/linux64GccDPOpt/bin/rhoCentralFoam"
[g01:18282] *** Process received signal ***
[g01:18282] Signal: Segmentation fault (11)
[g01:18282] Signal code:  (-6)
[g01:18282] Failing at address: 0x3f80000476a

[g01:18282] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x32480) [0x2b5509053480]
[g01:18282] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x35) [0x2b5509053405]
[g01:18282] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x32480) [0x2b5509053480]
[g01:18282] [ 3] /opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so(_ZN4Foam18processorPolyPatch10updateMeshERNS_14PstreamBuffersE+0x2e6) [0x2b5508213f46]
[g01:18282] [ 4] /opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so(_ZN4Foam16polyBoundaryMesh10updateMeshEv+0x2b1) [0x2b550821afc1]
[g01:18282] [ 5] /opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so(_ZN4Foam8polyMeshC2ERKNS_8IOobjectE+0x10ea) [0x2b550826c16a]
[g01:18282] [ 6] /opt/openfoam201/platforms/linux64GccDPOpt/lib/libfiniteVolume.so(_ZN4Foam6fvMeshC1ERKNS_8IOobjectE+0x19) [0x2b5505b9b5f9]
[g01:18282] [ 7] rhoCentralFoam() [0x41f624]
[g01:18282] [ 8] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x2b550903fead]
[g01:18282] [ 9] rhoCentralFoam() [0x41c709]
[g01:18282] *** End of error message ***
[10]  in "/opt/openfoam201/platforms/linux64GccDPOpt/bin/rhoCentralFoam"
[g01:18289] *** Process received signal ***
[g01:18289] Signal: Segmentation fault (11)
[g01:18289] Signal code:  (-6)
[g01:18289] Failing at address: 0x3f800004771
[g01:18289] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x32480) [0x2aae80dde480]
[g01:18289] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x35) [0x2aae80dde405]
[g01:18289] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x32480) [0x2aae80dde480]
[g01:18289] [ 3] /opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so(_ZN4Foam18processorPolyPatch10updateMeshERNS_14PstreamBuffersE+0x2e6) [0x2aae7ff9ef46]
[g01:18289] [ 4] /opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so(_ZN4Foam16polyBoundaryMesh10updateMeshEv+0x2b1) [0x2aae7ffa5fc1]
[g01:18289] [ 5] /opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so(_ZN4Foam8polyMeshC2ERKNS_8IOobjectE+0x10ea) [0x2aae7fff716a]
[g01:18289] [ 6] /opt/openfoam201/platforms/linux64GccDPOpt/lib/libfiniteVolume.so(_ZN4Foam6fvMeshC1ERKNS_8IOobjectE+0x19) [0x2aae7d9265f9]
[g01:18289] [ 7] rhoCentralFoam() [0x41f624]
[g01:18289] [ 8] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x2aae80dcaead]
[g01:18289] [ 9] rhoCentralFoam() [0x41c709]
[g01:18289] *** End of error message ***

[11]  in "/opt/openfoam201/platforms/linux64GccDPOpt/bin/rhoCentralFoam"
[g01:18290] *** Process received signal ***
[g01:18290] Signal: Segmentation fault (11)
[g01:18290] Signal code:  (-6)
[g01:18290] Failing at address: 0x3f800004772
[g01:18290] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x32480) [0x2b88dc3a7480]
[g01:18290] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x35) [0x2b88dc3a7405]
[g01:18290] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x32480) [0x2b88dc3a7480]
[g01:18290] [ 3] /opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so(_ZN4Foam18processorPolyPatch10updateMeshERNS_14PstreamBuffersE+0x2e6) [0x2b88db567f46]
[g01:18290] [ 4] /opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so(_ZN4Foam16polyBoundaryMesh10updateMeshEv+0x2b1) [0x2b88db56efc1]
[g01:18290] [ 5] /opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so(_ZN4Foam8polyMeshC2ERKNS_8IOobjectE+0x10ea) [0x2b88db5c016a]
[g01:18290] [ 6] /opt/openfoam201/platforms/linux64GccDPOpt/lib/libfiniteVolume.so(_ZN4Foam6fvMeshC1ERKNS_8IOobjectE+0x19) [0x2b88d8eef5f9]
[g01:18290] [ 7] rhoCentralFoam() [0x41f624]
[g01:18290] [ 8] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x2b88dc393ead]
[g01:18290] [ 9] rhoCentralFoam() [0x41c709]
[g01:18290] *** End of error message ***
[15]  in "/opt/openfoam201/platforms/linux64GccDPOpt/bin/rhoCentralFoam"
[g01:18294] *** Process received signal ***
[g01:18294] Signal: Segmentation fault (11)
[g01:18294] Signal code:  (-6)
[g01:18294] Failing at address: 0x3f800004776
[g01:18294] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x32480) [0x2b046f357480]
[g01:18294] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x35) [0x2b046f357405]
[g01:18294] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x32480) [0x2b046f357480]
[g01:18294] [ 3] /opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so(_ZN4Foam18processorPolyPatch10updateMeshERNS_14PstreamBuffersE+0x2e6) [0x2b046e517f46]
[g01:18294] [ 4] /opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so(_ZN4Foam16polyBoundaryMesh10updateMeshEv+0x2b1) [0x2b046e51efc1]
[g01:18294] [ 5] /opt/openfoam201/platforms/linux64GccDPOpt/lib/libOpenFOAM.so(_ZN4Foam8polyMeshC2ERKNS_8IOobjectE+0x10ea) [0x2b046e57016a]
[g01:18294] [ 6] /opt/openfoam201/platforms/linux64GccDPOpt/lib/libfiniteVolume.so(_ZN4Foam6fvMeshC1ERKNS_8IOobjectE+0x19) [0x2b046be9f5f9]
[g01:18294] [ 7] rhoCentralFoam() [0x41f624]
[g01:18294] [ 8] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x2b046f343ead]
[g01:18294] [ 9] rhoCentralFoam() [0x41c709]
[g01:18294] *** End of error message ***
[g01:18278] 3 more processes have sent help message help-mpi-runtime.txt / mpi_init:warn-fork
[g01:18278] Set MCA parameter "orte_base_help_aggregate" to 0 to see all help / error messages
--------------------------------------------------------------------------
mpirun noticed that process rank 10 with PID 18289 on node g01 exited on signal 11 (Segmentation fault).
--------------------------------------------------------------------------
And if I decompose the problem into 32 processors I get this error

Code:
/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.0.1                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
Build  : 2.0.1-51f1de99a4bc
Exec   : rhoCentralFoam -parallel
Date   : Jul 18 2014
Time   : 18:16:47
Host   : g01
PID    : 18547
Case   : /home/guilha/cavidade_LES_b2_cortada_quarto_circulo
nProcs : 32
Slaves : 
31
(
g01.18548
g01.18549
g01.18550
g01.18551
g01.18552
g01.18553
g01.18554
g01.18555
g01.18556
g01.18557
g01.18558
g01.18559
g01.18560
g01.18561
g01.18562
g01.18563
g01.18564
g01.18565
g01.18566
g01.18567
g01.18568
g01.18569
g01.18570
g01.18571
g01.18572
g01.18573
g01.18574
g01.18575
g01.18576
g01.18577
g01.18578
)

Pstream initialized with:
    floatTransfer     : 0
    nProcsSimpleSum   : 0
    commsType         : nonBlocking
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 mesh for time = 0

[6] processorPolyPatch::order : Writing my 1 faces to OBJ file "/home/guilha/cavidade_LES_b2_cortada_quarto_circulo/processor6/procBoundary6to4throughtras_faces.obj"
[6] [4] processorPolyPatch::order : Writing my 1 faces to OBJ file "/home/guilha/cavidade_LES_b2_cortada_quarto_circulo/processor4/procBoundary4to6throughtras_faces.obj"

[6] 
[6] --> FOAM FATAL ERROR: 
[6] [4] face 0 area does not match neighbour by 2.7736233% -- possible face ordering problem.
patch:procBoundary6to4throughtras my area:1.9253552e-07 neighbour area:1.9795083e-07 matching tolerance:0.0001
Mesh face:146282 vertices:4((0.045137025 0.097803483 -0.06) (0.045443572 0.098400279 -0.06) (0.045698719 0.098267458 -0.06) (0.045393606 0.097673453 -0.06))
If you are certain your matching is correct you can increase the 'matchTolerance' setting in the patch dictionary in the boundary file.
Rerun with processor debug flag set for more information.
[6] 
[6]     From function processorPolyPatch::calcGeometry()
[6]     in file meshes/polyMesh/polyPatches/constraint/processor/processorPolyPatch.C at line 211.
[6] 
FOAM parallel run exiting
[6] 

--------------------------------------------------------------------------
MPI_ABORT was invoked on rank 6 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.
--------------------------------------------------------------------------
[4] 
[4] --> FOAM FATAL ERROR: 
[4] face 0 area does not match neighbour by 2.7736233% -- possible face ordering problem.
patch:procBoundary4to6throughtras my area:1.9795083e-07 neighbour area:1.9253552e-07 matching tolerance:0.0001
Mesh face:148636 vertices:4((0.039490919 0.088355229 -0.06) (0.039694739 0.089014176 -0.06) (0.039969074 0.088927678 -0.06) (0.039766181 0.088271729 -0.06))
If you are certain your matching is correct you can increase the 'matchTolerance' setting in the patch dictionary in the boundary file.
Rerun with processor debug flag set for more information.
[4] 
[4]     From function processorPolyPatch::calcGeometry()
[4]     in file meshes/polyMesh/polyPatches/constraint/processor/processorPolyPatch.C at line 211.
[4] 
FOAM parallel run exiting
[4] 
--------------------------------------------------------------------------
mpirun has exited due to process rank 6 with PID 18553 on
node g01 exiting without calling "finalize". This may
have caused other processes in the application to be
terminated by signals sent by mpirun (as reported here).
--------------------------------------------------------------------------
[g01:18546] 1 more process has sent help message help-mpi-api.txt / mpi-abort
[g01:18546] Set MCA parameter "orte_base_help_aggregate" to 0 to see all help / error messages
My chekcMesh -allGeometry -allTopology is

Code:
/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.0.1                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
Build  : 2.0.1-51f1de99a4bc
Exec   : checkMesh -allGeometry -allTopology
Date   : Jul 18 2014
Time   : 18:13:15
Host   : g01
PID    : 18543
Case   : /home/guilha/cavidade_LES_b2_cortada_quarto_circulo
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

Create polyMesh for time = 0

Time = 0

Mesh stats
    points:           1617325
    faces:            4692234
    internal faces:   4534422
    cells:            1537776
    boundary patches: 6
    point zones:      0
    face zones:       0
    cell zones:       0

Overall number of cells of each type:
    hexahedra:     1537776
    prisms:        0
    wedges:        0
    pyramids:      0
    tet wedges:    0
    tetrahedra:    0
    polyhedra:     0

Checking topology...
    Boundary definition OK.
    Cell to face addressing OK.
    Point usage OK.
    Upper triangular ordering OK.
    Face vertices OK.
    Topological cell zip-up check OK.
    Face-face connectivity OK.
    Number of regions: 1 (OK).

Checking patch topology for multiply connected surfaces ...
    Patch               Faces    Points   Surface topology                   Bounding box
    entrada             2184     2300     ok (non-closed singly connected)   (-0.05 0.12 -0.06) (-0.05 0.22 0.06)
    topo                8304     8675     ok (non-closed singly connected)   (-0.05 0.22 -0.06) (0.25 0.22 0.06)
    saida               3912     4100     ok (non-closed singly connected)   (0.25 0.12 -0.06) (0.25 0.22 0.06)
    parede              15264    15925    ok (non-closed singly connected)   (-0.05 0 -0.06) (0.25 0.12 0.06)
    tras                64074    64693    ok (non-closed singly connected)   (-0.05 0 -0.06) (0.25 0.22 -0.06)
    frente              64074    64693    ok (non-closed singly connected)   (-0.05 0 0.06) (0.25 0.22 0.06)

Checking geometry...
    Overall domain bounding box (-0.05 0 -0.06) (0.25 0.22 0.06)
    Mesh (non-empty, non-wedge) directions (1 1 1)
    Mesh (non-empty) directions (1 1 1)
    Boundary openness (7.8260831e-16 -1.6624064e-15 9.690703e-15) OK.
    Max cell openness = 2.9199144e-16 OK.
    Max aspect ratio = 34.645739 OK.
    Minumum face area = 7.005391e-08. Maximum face area = 2.3239264e-05.  Face area magnitudes OK.
    Min volume = 3.5026955e-10. Max volume = 4.4297358e-08.  Total volume = 0.0043843852.  Cell volumes OK.
    Mesh non-orthogonality Max: 45.498392 average: 7.6294074
    Non-orthogonality check OK.
    Face pyramids OK.
    Max skewness = 0.53126862 OK.
    Face tets OK.
    Min/max edge length = 0.00014431789 0.005 OK.
    All angles in faces OK.
    Face flatness (1 = flat, 0 = butterfly) : average = 1  min = 1
    All face flatness OK.
    Cell determinant (wellposedness) : minimum: 0.0011457573 average: 0.58863649
    Cell determinant check OK.
    Concave cell check OK.

Mesh OK.

End
Does anybody know what can I do ?

Remember that in a single processor it works fine. Thanks in advance.
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Old   July 26, 2014, 11:55
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Hi guilha,

Mmm... I originally thought you were using OpenFOAM 2.1... but if it's OpenFOAM 2.0.1, then my guess is that you're having problems with decomposing cyclic patches. Actually, I vaguely remember that only in OpenFOAM 2.2 were fully fixed the issues with decomposing cyclic patches.

Try using the "preservePatches" entry in "decomposeParDict". In the file "applications/utilities/parallelProcessing/decomposePar/decomposeParDict" you should find this example:
Code:
//- Keep owner and neighbour on same processor for faces in patches:
// (makes sense only for cyclic patches)
//preservePatches (cyclic_half0 cyclic_half1);
Uncomment the last line and use the names of your cyclic patches.

Best regards,
Bruno
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