[vitormoura]

Hi, I'm getting a problem that I can't find answer anywhere, I'm trying to run a parallel and only achieve 2 subdomains, if I increase to 4 keep sending me error messages.
2D domain hex (80x1x40). Type patch at Inlet, Outlet, Wall. Empty at frontandback. symmetryPanel at oposite of wall.

OpenFoam 2.1.1 solver biomassGasificationFoam

decomposeParDict

numberOfSubdomains 4;
method            simple;
simpleCoeffs
{
    n               (1 1 4);
    delta           0.001;
}
}

decomposePar

Constructing processor meshes

Processor 0
    Number of cells = 800
    Number of faces shared with processor 1 = 80
    Number of processor patches = 1
    Number of processor faces = 80
    Number of boundary faces = 1700

Processor 1
    Number of cells = 800
    Number of faces shared with processor 0 = 80
    Number of faces shared with processor 2 = 80
    Number of processor patches = 2
    Number of processor faces = 160
    Number of boundary faces = 1620

Processor 2
    Number of cells = 800
    Number of faces shared with processor 1 = 80
    Number of faces shared with processor 3 = 80
    Number of processor patches = 2
    Number of processor faces = 160
    Number of boundary faces = 1620

Processor 3
    Number of cells = 800
    Number of faces shared with processor 2 = 80
    Number of processor patches = 1
    Number of processor faces = 80
    Number of boundary faces = 1700

Number of processor faces = 240
Max number of cells = 800 (0% above average 800)
Max number of processor patches = 2 (33.3333% above average 1.5)
Max number of faces between processors = 160 (33.3333% above average 120)

CheckMesh

Mesh stats
    points:           6642
    internal points:  0
    faces:            12920
    internal faces:   6280
    cells:            3200
    boundary patches: 5
    point zones:      0
    face zones:       0
    cell zones:       0

Overall number of cells of each type:
    hexahedra:     3200
    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.
    Number of regions: 1 (OK).

Checking patch topology for multiply connected surfaces ...
    Patch               Faces    Points   Surface topology                  
    outlet              80       162      ok (non-closed singly connected)  
    inlet               80       162      ok (non-closed singly connected)  
    wall                40       82       ok (non-closed singly connected)  
    frontback           6400     6642     ok (non-closed singly connected)  
    symmetry            40       82       ok (non-closed singly connected)  

Checking geometry...
    Overall domain bounding box (-0.004 0 -0.004) (0 0.001 0.004)
    Mesh (non-empty, non-wedge) directions (1 0 1)
    Mesh (non-empty) directions (1 0 1)
    All edges aligned with or perpendicular to non-empty directions.
    Boundary openness (8.4222e-18 1.55397e-16 7.25663e-17) OK.
    Max cell openness = 1.65436e-16 OK.
    Max aspect ratio = 4 OK.
    Minumum face area = 1e-08. Maximum face area = 2e-07.  Face area magnitudes OK.
    Min volume = 1e-11. Max volume = 1e-11.  Total volume = 3.2e-08.  Cell volumes OK.
    Mesh non-orthogonality Max: 0 average: 0
    Non-orthogonality check OK.
    Face pyramids OK.
    Max skewness = 0.000249975 OK.
    Coupled point location match (average 0) OK.

Mesh OK.

Error

PIMPLE: Operating solver in PISO mode



Starting time loop

Courant Number mean: 0.1 max: 0.1
[2] [0] #0  Foam::error::printStack(Foam::Ostream&)#0  Foam::error::printStack(Foam::Ostream&) at ??:?
[2] #1  Foam::sigFpe::sigHandler(int) at ??:?
[0] #1  Foam::sigFpe::sigHandler(int) at ??:?
[0] #2   at ??:?
[2] #2   in "/lib/x86_64-linux-gnu/libc.so.6"
[2] #3  Foam::heterogeneousPyrolysisModels::volPyrolysis::solidRegionDiffNo() const in "/lib/x86_64-linux-gnu/libc.so.6"
[0] #3  Foam::heterogeneousPyrolysisModels::volPyrolysis::solidRegionDiffNo() const at ??:?
[0] #4   at ??:?
[2] #4  

[0]  at ??:?
[0] #5  __libc_start_main[2]  at ??:?
[2] #5  __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
[2] #6   in "/lib/x86_64-linux-gnu/libc.so.6"
[0] #6  

[2]  at ??:?
[DESKTOP-PCU:09684] *** Process received signal ***
[DESKTOP-PCU:09684] Signal: Floating point exception (8)
[DESKTOP-PCU:09684] Signal code:  (-6)
[DESKTOP-PCU:09684] Failing at address: 0x3e8000025d4
[DESKTOP-PCU:09684] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x354b0) [0x7f0b8e3664b0]
[DESKTOP-PCU:09684] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38) [0x7f0b8e366428]
[DESKTOP-PCU:09684] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x354b0) [0x7f0b8e3664b0]
[DESKTOP-PCU:09684] [ 3]  /home/desktop-pcu/OpenFOAM/OpenFOAM-2.1.1/biomassGasificationMedia/lib/libHGSheterogeneousPyrolysisModels.so(_ZNK4Foam28heterogeneousPyrolysisModels12volPyrolysis17solidRegionDiffNoEv+0x1c7)  [0x7f0b90c17c87]
[DESKTOP-PCU:09684] [ 4] biomassGasificationFoam() [0x42aefa]
[DESKTOP-PCU:09684] [ 5] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0) [0x7f0b8e351830]
[DESKTOP-PCU:09684] [ 6] biomassGasificationFoam() [0x433139]
[DESKTOP-PCU:09684] *** End of error message ***
[0]  at ??:?
[DESKTOP-PCU:09682] *** Process received signal ***
[DESKTOP-PCU:09682] Signal: Floating point exception (8)
[DESKTOP-PCU:09682] Signal code:  (-6)
[DESKTOP-PCU:09682] Failing at address: 0x3e8000025d2
[DESKTOP-PCU:09682] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x354b0) [0x7fc833f324b0]
[DESKTOP-PCU:09682] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38) [0x7fc833f32428]
[DESKTOP-PCU:09682] [ 2] /lib/x86_64-linux-gnu/libc.so.6(+0x354b0) [0x7fc833f324b0]
[DESKTOP-PCU:09682] [ 3]  /home/desktop-pcu/OpenFOAM/OpenFOAM-2.1.1/biomassGasificationMedia/lib/libHGSheterogeneousPyrolysisModels.so(_ZNK4Foam28heterogeneousPyrolysisModels12volPyrolysis17solidRegionDiffNoEv+0x1c7)  [0x7fc8367e3c87]
[DESKTOP-PCU:09682] [ 4] biomassGasificationFoam() [0x42aefa]
[DESKTOP-PCU:09682] [ 5] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0) [0x7fc833f1d830]
[DESKTOP-PCU:09682] [ 6] biomassGasificationFoam() [0x433139]
[DESKTOP-PCU:09682] *** End of error message ***
--------------------------------------------------------------------------
mpirun noticed that process rank 2 with PID 9684 on node DESKTOP-PCU  exited on signal 8 (Floating point exception).

Already tried to increase on setting swap memory, without sucess.
Already tried to use a coarser grid.
Already tried to decrease timestep.
Thank's in advance.

[Eko]

Did you check your boundary conditions?
I had an similar error with another solver and changing boundary conditions worked for me. Especially changing the ones for U.

[vitormoura]

Originally Posted by Eko

Did you check your boundary conditions?
I had an similar error with another solver and changing boundary conditions worked for me. Especially changing the ones for U.

I'll try. Thank's for the fast answer. Soon (8 hours from now) I'll edit this comment and post what I conclude.