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Old   May 9, 2013, 01:42
Default blockMesh axisymmetry error
  #1
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Vyaas Gururajan
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I'm having trouble getting blockMesh to work with the blockMesh Dict file below. I think the problem is in the face descriptions. The file works when I define the face probe_top as (3 5 2 3) instead of (3 2 5 3), which doesn't make sense because all surface normal vectors, we're told, must point OUTSIDE the domain.

Code:
/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.2.0                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * **//


convertToMeters 1.00;

vertices
(
    (0.000   0.000  -1.000)	//0
    (1.970   0.350  -1.000)	//1
    (1.970   0.350   1.000)	//2
    (0.000   0.000   1.000)	//3
    (1.970  -0.350  -1.000)	//4
    (1.970  -0.350   1.000)	//5
);

blocks
(
    hex (0 4 1 0 3 5 2 3) (10 1 10) simpleGrading (1 1 1)
);

edges
(
);

boundary
(
    frontAndBack
    {
        type wedge;
        faces
        (
            (0 1 2 3)
            (0 3 5 4)
        );
    }
    probe_top
    {
        type patch;
        faces
        (
            (3 2 5 3)
        );
    }
    outlet
    {
        type patch;
        faces
        (
            (1 4 5 2)
        );
    }
    probe_bottom
    {
        type patch;
        faces
        (
            (0 4 1 0)
        );
    }
    axis_symmetry
    {
        type empty;
        faces
        (
            (0 3 3 0)
        );
    }
);

mergePatchPairs
(
);
// ************************************************************************* //
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Old   May 9, 2013, 02:20
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Tushar
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Quote:
Originally Posted by vyaas View Post
I'm having trouble getting blockMesh to work with the blockMesh Dict file below. I think the problem is in the face descriptions. The file works when I define the face probe_top as (3 5 2 3) instead of (3 2 5 3), which doesn't make sense because all surface normal vectors, we're told, must point OUTSIDE the domain.

Code:
/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.2.0                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * **//


convertToMeters 1.00;

vertices
(
    (0.000   0.000  -1.000)    //0
    (1.970   0.350  -1.000)    //1
    (1.970   0.350   1.000)    //2
    (0.000   0.000   1.000)    //3
    (1.970  -0.350  -1.000)    //4
    (1.970  -0.350   1.000)    //5
);

blocks
(
    hex (0 4 1 0 3 5 2 3) (10 1 10) simpleGrading (1 1 1)
);

edges
(
);

boundary
(
    frontAndBack
    {
        type wedge;
        faces
        (
            (0 1 2 3)
            (0 3 5 4)
        );
    }
    probe_top
    {
        type patch;
        faces
        (
            (3 2 5 3)
        );
    }
    outlet
    {
        type patch;
        faces
        (
            (1 4 5 2)
        );
    }
    probe_bottom
    {
        type patch;
        faces
        (
            (0 4 1 0)
        );
    }
    axis_symmetry
    {
        type empty;
        faces
        (
            (0 3 3 0)
        );
    }
);

mergePatchPairs
(
);
// ************************************************************************* //

I don't understand what you are trying to make.

First of all, the vertices seems to be incorrect. Secondly, the boundary patches are also incorrect.

Read the following weblink & try to understand the approach. Then, apply it on your particular case.

http://www.openfoam.org/docs/user/blockMesh.php
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Old   May 9, 2013, 02:27
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Vyaas Gururajan
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Quote:
Originally Posted by Tushar@cfd View Post
I don't understand what you are trying to make.

First of all, the vertices seems to be incorrect. Secondly, the boundary patches are also incorrect.

Read the following weblink & try to understand the approach. Then, apply it on your particular case.

http://www.openfoam.org/docs/user/blockMesh.php

I actually followed a tutorial for an axisymmetric geometry:
http://openfoamwiki.net/index.php/Ma...s/AxiSymmetric

If you could point out a mistake in what I'd posted earlier, I'd be grateful.
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Old   May 9, 2013, 02:48
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Quote:
Originally Posted by vyaas View Post
I actually followed a tutorial for an axisymmetric geometry:
http://openfoamwiki.net/index.php/Ma...s/AxiSymmetric

If you could point out a mistake in what I'd posted earlier, I'd be grateful.

Upload your case file here.
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Old   May 9, 2013, 02:59
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Vyaas Gururajan
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Quote:
Originally Posted by Tushar@cfd View Post
Upload your case file here.
Here it is:
https://www.dropbox.com/s/h57vfldxxx...xi_test.tar.gz
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Old   May 9, 2013, 03:17
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Tushar
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Quote:
Originally Posted by vyaas View Post

I am sorry for my earlier comment. Actually, I have mistaken it for the square-block type geometry. Your case is of wedge type.

I re-checked your blockMesh, even I copied 0 folder in your case folder which you have uploaded in order to run the command - checkMesh.

It is working all fine, checkMesh & blockMesh both are working for the patch (3 2 5 3).

Do, one thing copy a 0 folder and run checkMesh & blockMesh.

Let me know if its not working.
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Old   May 9, 2013, 03:21
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Vyaas Gururajan
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Quote:
Originally Posted by Tushar@cfd View Post
I am sorry for my earlier comment. Actually, I have mistaken it for the square-block type geometry. Your case is of wedge type.

I re-checked your blockMesh, even I copied 0 folder in your case folder which you have uploaded in order to run the command - checkMesh.

It is working all fine, checkMesh & blockMesh both are working for the patch (3 2 5 3).

Do, one thing copy a 0 folder and run checkMesh & blockMesh.

Let me know if its not working.
I did that and it doesn't work. Here's my output

Code:
/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.2.0                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
Build  : 2.2.0
Exec   : checkMesh
Date   : May 09 2013
Time   : 00:21:32
Host   : "poli2"
PID    : 3605
Case   : /home/vyaas/openfoam/probe_axi/counterFlowFlame2D
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



--> FOAM FATAL ERROR: 
Cannot find file "points" in directory "polyMesh" in times 0 down to constant

    From function Time::findInstance(const fileName&, const word&, const IOobject::readOption, const word&)
    in file db/Time/findInstance.C at line 203.

FOAM exiting

[vyaas@poli2 counterFlowFlame2D]$ blockMesh >log.dat


--> FOAM FATAL ERROR: 
face 0 in patch 1 does not have neighbour cell face: 4(3 2 5 3)

    From function polyMesh::facePatchFaceCells(const faceList& patchFaces,const labelListList& pointCells,const faceListList& cellsFaceShapes,const label patchID)
    in file meshes/polyMesh/polyMeshFromShapeMesh.C at line 127.

FOAM aborting

#0  Foam::error::printStack(Foam::Ostream&) in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#1  Foam::error::abort() in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#2  Foam::polyMesh::facePatchFaceCells(Foam::List<Foam::face> const&, Foam::List<Foam::List<int> > const&, Foam::List<Foam::List<Foam::face> > const&, int) const in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#3  Foam::polyMesh::setTopology(Foam::List<Foam::cellShape> const&, Foam::List<Foam::List<Foam::face> > const&, Foam::List<Foam::word> const&, Foam::List<int>&, Foam::List<int>&, int&, int&, Foam::List<Foam::cell>&) in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#4  Foam::polyMesh::polyMesh(Foam::IOobject const&, Foam::Xfer<Foam::Field<Foam::Vector<double> > > const&, Foam::List<Foam::cellShape> const&, Foam::List<Foam::List<Foam::face> > const&, Foam::List<Foam::word> const&, Foam::PtrList<Foam::dictionary> const&, Foam::word const&, Foam::word const&, bool) in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#5  Foam::blockMesh::createTopology(Foam::IOdictionary const&, Foam::word const&) in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libblockMesh.so"
#6  Foam::blockMesh::blockMesh(Foam::IOdictionary const&, Foam::word const&) in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libblockMesh.so"
#7  
 in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/bin/blockMesh"
#8  __libc_start_main in "/usr/lib/libc.so.6"
#9  
 in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/bin/blockMesh"
Aborted (core dumped)
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Old   May 9, 2013, 03:33
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Tushar
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Quote:
Originally Posted by vyaas View Post
I did that and it doesn't work. Here's my output

Code:
/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.2.0                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
Build  : 2.2.0
Exec   : checkMesh
Date   : May 09 2013
Time   : 00:21:32
Host   : "poli2"
PID    : 3605
Case   : /home/vyaas/openfoam/probe_axi/counterFlowFlame2D
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



--> FOAM FATAL ERROR: 
Cannot find file "points" in directory "polyMesh" in times 0 down to constant

    From function Time::findInstance(const fileName&, const word&, const IOobject::readOption, const word&)
    in file db/Time/findInstance.C at line 203.

FOAM exiting

[vyaas@poli2 counterFlowFlame2D]$ blockMesh >log.dat


--> FOAM FATAL ERROR: 
face 0 in patch 1 does not have neighbour cell face: 4(3 2 5 3)

    From function polyMesh::facePatchFaceCells(const faceList& patchFaces,const labelListList& pointCells,const faceListList& cellsFaceShapes,const label patchID)
    in file meshes/polyMesh/polyMeshFromShapeMesh.C at line 127.

FOAM aborting

#0  Foam::error::printStack(Foam::Ostream&) in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#1  Foam::error::abort() in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#2  Foam::polyMesh::facePatchFaceCells(Foam::List<Foam::face> const&, Foam::List<Foam::List<int> > const&, Foam::List<Foam::List<Foam::face> > const&, int) const in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#3  Foam::polyMesh::setTopology(Foam::List<Foam::cellShape> const&, Foam::List<Foam::List<Foam::face> > const&, Foam::List<Foam::word> const&, Foam::List<int>&, Foam::List<int>&, int&, int&, Foam::List<Foam::cell>&) in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#4  Foam::polyMesh::polyMesh(Foam::IOobject const&, Foam::Xfer<Foam::Field<Foam::Vector<double> > > const&, Foam::List<Foam::cellShape> const&, Foam::List<Foam::List<Foam::face> > const&, Foam::List<Foam::word> const&, Foam::PtrList<Foam::dictionary> const&, Foam::word const&, Foam::word const&, bool) in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#5  Foam::blockMesh::createTopology(Foam::IOdictionary const&, Foam::word const&) in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libblockMesh.so"
#6  Foam::blockMesh::blockMesh(Foam::IOdictionary const&, Foam::word const&) in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libblockMesh.so"
#7  
 in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/bin/blockMesh"
#8  __libc_start_main in "/usr/lib/libc.so.6"
#9  
 in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/bin/blockMesh"
Aborted (core dumped)

Are you able to compile icoFoam tutorial as mentioned on the installation website??
http://www.openfoam.org/download/source.php
Check with the available tutorial.

The problem lies here:
/home/vyaas/openfoam/probe_axi/counterFlowFlame2D

In order to install OpenFoam you need to follow path, for example for your particular case:

/home/vyaas/OpenFOAM/OpenFOAM-2.2.0/probe_axi/counterFlowFlame2D
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Old   May 9, 2013, 03:42
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Vyaas Gururajan
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Quote:
Originally Posted by Tushar@cfd View Post
Are you able to compile icoFoam tutorial as mentioned on the installation website??
http://www.openfoam.org/download/source.php
Check with the available tutorial.

The problem lies here:
/home/vyaas/openfoam/probe_axi/counterFlowFlame2D

In order to install OpenFoam you need to follow path, for example for your particular case:

/home/vyaas/OpenFOAM/OpenFOAM-2.2.0/probe_axi/counterFlowFlame2D
I appreciate your help but I'm confident of my working directories and am running many other cases right now (and have run icoFoam many times as well). I believe the main issue is this:

That a vector normal to one of the surfaces pointing outwards doesn't work when one pointing inwards does.

Could this be because of a possible error in the way wedge geometries are implemented? I've run such cases before on previous versions of OpenFOAM and they've run fine. I wanted to know if there is the slight chance that some recent updates could have changed or overlooked something critical in blockMesh. Or perhaps a standard for defining the local coordinates for a block has changed?
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Old   May 9, 2013, 03:50
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Quote:
Originally Posted by vyaas View Post
I appreciate your help but I'm confident of my working directories and am running many other cases right now (and have run icoFoam many times as well). I believe the main issue is this:

That a vector normal to one of the surfaces pointing outwards doesn't work when one pointing inwards does.

Could this be because of a possible error in the way wedge geometries are implemented? I've run such cases before on previous versions of OpenFOAM and they've run fine. I wanted to know if there is the slight chance that some recent updates could have changed or overlooked something critical in blockMesh. Or perhaps a standard for defining the local coordinates for a block has changed?

Then, I think you post your comments over here: http://www.cfd-online.com/Forums/openfoam-bugs/ , may be the experts of OF may help you in this regards.

As for me, I am able to run your case file with the followed path in previous versions of OF. Even the same patch has worked for me. I haven't tried OF-2.2.0, may be the blockMesh functionality for patches might have changed. Here is the link for it: http://www.openfoam.org/version2.0.0/meshing.php. You need to explore these, I wish you very best for that.

Anyways, do let us know if it solves.
Last edited by Tushar@cfd; May 9, 2013 at 04:06.
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Old   May 9, 2013, 20:26
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You posted what happens when you run checkMesh.
What happens when you actually run the command blockMesh?
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Old   May 9, 2013, 21:11
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Quote:
Originally Posted by adhiraj View Post
You posted what happens when you run checkMesh.
What happens when you actually run the command blockMesh?

Code:
[vyaas@poli2 counterFlowFlame2D]$ blockMesh >log.dat


--> FOAM FATAL ERROR: 
face 0 in patch 1 does not have neighbour cell face: 4(3 2 5 3)

    From function polyMesh::facePatchFaceCells(const faceList& patchFaces,const labelListList& pointCells,const faceListList& cellsFaceShapes,const label patchID)
    in file meshes/polyMesh/polyMeshFromShapeMesh.C at line 127.

FOAM aborting

#0  Foam::error::printStack(Foam::Ostream&) in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#1  Foam::error::abort() in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#2  Foam::polyMesh::facePatchFaceCells(Foam::List<Foam::face> const&, Foam::List<Foam::List<int> > const&, Foam::List<Foam::List<Foam::face> > const&, int) const in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#3  Foam::polyMesh::setTopology(Foam::List<Foam::cellShape> const&, Foam::List<Foam::List<Foam::face> > const&, Foam::List<Foam::word> const&, Foam::List<int>&, Foam::List<int>&, int&, int&, Foam::List<Foam::cell>&) in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#4  Foam::polyMesh::polyMesh(Foam::IOobject const&, Foam::Xfer<Foam::Field<Foam::Vector<double> > > const&, Foam::List<Foam::cellShape> const&, Foam::List<Foam::List<Foam::face> > const&, Foam::List<Foam::word> const&, Foam::PtrList<Foam::dictionary> const&, Foam::word const&, Foam::word const&, bool) in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#5  Foam::blockMesh::createTopology(Foam::IOdictionary const&, Foam::word const&) in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libblockMesh.so"
#6  Foam::blockMesh::blockMesh(Foam::IOdictionary const&, Foam::word const&) in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/lib/libblockMesh.so"
#7  
 in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/bin/blockMesh"
#8  __libc_start_main in "/usr/lib/libc.so.6"
#9  
 in "/opt/OpenFOAM/OpenFOAM-2.2.0/platforms/linux64GccDPOpt/bin/blockMesh"
Aborted (core dumped)
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Old   May 10, 2013, 14:36
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The frontAndBack patch should be split in "front" and "back".
Check the link you provided.
I don't know if this will correct the situation, I encounter no other errors and get a good checkMesh with your blockMeshDict in OF 2.1.x.
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