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Old   February 21, 2012, 18:32
Default Help With a Cylindrical Tank Mesh
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Hello,

I am having difficulties with a cylindrical tank mesh. It was made by a generator that someone had posted on this site. Here is the blockMeshDict that is having problems...

/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.1.0 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

convertToMeters 1;

vertices
(
( 2.5 0.0 2.5) // Vertex fiveoclocksqb = 0
(-2.5 0.0 2.5) // Vertex sevenoclocksqb = 1
(-2.5 0.0 -2.5) // Vertex elevenoclocksqb = 2
( 2.5 0.0 -2.5) // Vertex oneoclocksqb = 3

( 3.5355339091057 0.0 3.53553390275978) // Vertex fiveoclockcb = 4
(-3.5355339091057 0.0 3.53553390275978) // Vertex sevenoclockcb = 5
(-3.5355339091057 0.0 -3.53553390275978) // Vertex elevenoclockcb = 6
( 3.5355339091057 0.0 -3.53553390275978) // Vertex oneoclockcb = 7

( 2.5 4 2.5) // Vertex fiveoclocksqt = 8
(-2.5 4 2.5) // Vertex sevenoclocksqt = 9
(-2.5 4 -2.5) // Vertex elevenoclocksqt = 10
( 2.5 4 -2.5) // Vertex oneoclocksqt = 11

( 3.5355339091057 4 3.53553390275978) // Vertex fiveoclockct = 12
(-3.5355339091057 4 3.53553390275978) // Vertex sevenoclockct = 13
(-3.5355339091057 4 -3.53553390275978) // Vertex elevenoclockct = 14
( 3.5355339091057 4 -3.53553390275978) // Vertex oneoclockct = 15
);

blocks
(
//square block
hex (
1 0 3 2
9 8 11 10
)
(10 10 10)
simpleGrading (1 1 1)

//slice1
hex (
5 4 0 1
13 12 8 9
)
(10 10 10)
simpleGrading (1 1 1)

//slice2
hex (
1 2 6 5
9 10 14 13
)
(10 10 10)
simpleGrading (1 1 1)

//slice3
hex (
2 3 7 6
10 11 15 14
)
(10 10 10)
simpleGrading (1 1 1)

//slice4
hex (
3 0 4 7
11 8 12 15
)
(10 10 10)
simpleGrading (1 1 1)

);


//create the quarter circles
edges
(
arc 4 5 (0.0 0.0 5)
arc 5 6 (-5 0.0 0.0)
arc 6 7 (0.0 0.0 -5)
arc 7 4 (5 0.0 0.0)

arc 12 13 (0.0 4 5)
arc 13 14 (-5 4 0.0)
arc 14 15 (0.0 4 -5)
arc 15 12 (5 4 0.0)

);

patches
(
patch outlet
(
(2 4(0 3 2 1))
(2 4(0 4 7 3))
(2 4(4 0 1 5))
(2 4(1 2 6 5))
(2 4(3 7 6 2))
)

patch inlet
(
(2 4(8 11 10 9))
(2 4(8 12 15 11))
(2 4(12 8 9 13))
(2 4(9 10 14 13))
(2 4(11 15 14 10))
)

wall walls
(
(2 4(5 4 12 13))
(2 4(5 13 14 6))
(2 4(6 14 15 7))
(2 4(7 15 12 4))
)

);

Any help as to why this is giving me errors would be greatly appreciated.

Thanks
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Old   February 21, 2012, 20:46
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It is generally useful to post the error messages you get when trying to run an application, otherwise we don't know what the problem is without running it ourselves, and the possibility exists that we can't reproduce the error. Please post your error message to obtain better help.
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Old   February 21, 2012, 21:35
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Thank you for your reply, sorry - here is the error code.

Thank you!

XXXXXX@XXXXXXX-VirtualBox:~/OpenFOAM/XXXXX-2.1.0/run/TankBlending$ blockMesh
/*---------------------------------------------------------------------------*\
| ========= | |
| \\ / 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 : blockMesh
Date : Feb 21 2012
Time : 19:19:30
Host : "xxxxxx-VirtualBox"
PID : 1681
Case : /home/xxxxx/OpenFOAM/xxxxxx-2.1.0/run/TankBlending
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

Creating block mesh from
"/home/xxxxx/OpenFOAM/george-2.1.0/run/TankBlending/constant/polyMesh/blockMeshDict"
Creating curved edges
Creating topology blocks
Creating topology patches

Reading patches section


--> FOAM FATAL IO ERROR:
wrong token type - expected int, found on line 106 the punctuation token '('

file: /home/xxxxxx/OpenFOAM/george-2.1.0/run/TankBlending/constant/polyMesh/blockMeshDict:atches at line 106.

From function operator>>(Istream&, int&)
in file primitives/ints/int/intIO.C at line 68.

FOAM exiting
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Old   February 22, 2012, 13:26
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Quote:
--> FOAM FATAL IO ERROR:
wrong token type - expected int, found on line 106 the punctuation token '('
The error says that there was a '(' read when it expected a number. If you look carefully at your patches, you will see that there is an extra set of parentheses outside the patch definition along with extra numbers [i.e. (2 4(x x x x))] get rid of the extra parentheses and numbers and it should work.

Make sure you read the error messages carefully; though they can be obtuse sometimes they more often than not point you exactly where the error is, especially FOAM FATAL IO errors. They are probably the easiest to fix.
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Old   February 23, 2012, 11:00
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Hello,

I followed your advice and got a little closer. The blockMesh command looked like it worked and a boundary file as well as several other files were created (faces, etc). However, when I use the command paraFoam to view the mesh, I get this error:
/*---------------------------------------------------------------------------*\
| ========= | |
| \\ / 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 : blockMesh
Date : Feb 23 2012
Time : 08:49:45
Host : "george-VirtualBox"
PID : 2155
Case : /home/george/OpenFOAM/george-2.1.0/run/TankBlending
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

Creating block mesh from
"/home/george/OpenFOAM/george-2.1.0/run/TankBlending/constant/polyMesh/blockMeshDict"
Creating curved edges
Creating topology blocks
Creating topology patches

Reading patches section

Creating block mesh topology

Reading physicalType from existing boundary file

Default patch type set to empty

Check topology

Basic statistics
Number of internal faces : 8
Number of boundary faces : 14
Number of defined boundary faces : 14
Number of undefined boundary faces : 0
Checking patch -> block consistency

Creating block offsets
Creating merge list .

Creating polyMesh from blockMesh
Creating patches
Creating cells
Creating points with scale 1

There are no merge patch pairs edges

Writing polyMesh
----------------
Mesh Information
----------------
boundingBox: (-5 0 -5) (5 4 5)
nPoints: 5731
nCells: 5000
nFaces: 15700
nInternalFaces: 14300
----------------
Patches
----------------
patch 0 (start: 14300 size: 500) name: outlet
patch 1 (start: 14800 size: 500) name: inlet
patch 2 (start: 15300 size: 400) name: walls

End

george@george-VirtualBox:~/OpenFOAM/george-2.1.0/run/TankBlending$ paraFoam
created temporary 'TankBlending.OpenFOAM'


--> FOAM FATAL IO ERROR:
"ill defined primitiveEntry starting at keyword 'patch' on line 23 and ending at line 45"

file: /home/george/OpenFOAM/george-2.1.0/run/TankBlending/0/U at line 45.

From function primitiveEntry::readEntry(const dictionary&, Istream&)
in file lnInclude/IOerror.C at line 132.

FOAM exiting

Segmentation fault



I can't seem to see what the problems are at the specified lines. Any help would be appreciated.

Thank you
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Old   February 23, 2012, 13:47
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Quote:
--> FOAM FATAL IO ERROR:
"ill defined primitiveEntry starting at keyword 'patch' on line 23 and ending at line 45"

file: /home/george/OpenFOAM/george-2.1.0/run/TankBlending/0/U at line 45.
If you read this message carefully, it tells you exactly what the problem is: something is wrong with the U file in your 0 directory, probably your BC's don't conform to the mesh.

Make sure you take the time to actually READ the error messages before you give up. It will be better for you in the long run of using Foam and you will solve your problems faster. (Its taken roughly a day for me to see this latest post and reply, whereas you probably could have solved the problem on your own in half that time).
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