CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Running, Solving & CFD

Boundary openness

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   February 5, 2009, 08:02
Default Hi Forum, for a case of CFD
  #1
t42
New Member
 
Denk Marcus
Join Date: Mar 2009
Posts: 13
Rep Power: 8
t42 is on a distinguished road
Hi Forum,

for a case of CFD i created a mesh with Cubit 11.0
and converted it into a Fluent-Mesh. I imported the mesh into OpenFoam with fluent3DMeshToFoam and everything was allright.

But when i did checkMesh then Boundary openness was about a scale of 1e-5 in the x-direction.

Does somebody has an idea to solve this problem.
Iám new in CFD.

for better understanding i post the error message of checkMesh:

"Checking topology...
Boundary definition OK.
Point usage OK.
Upper triangular ordering OK.
***Open cells found, number of cells: 54. This problem may be fixable using the zipUpMesh utility.
<<Writing 54 cells with over used edges to set zipUpCells
Face vertices OK.
Face-face connectivity OK.
Number of regions: 1 (OK).

Checking patch topology for multiply connected surfaces ...
Patch Faces Points Surface
wall_1 0 0 ok (empty)
sideset_zone_21 2677 2789 ok (not multiply connected)
sideset_zone_22 2677 2789 ok (not multiply connected)
sideset_zone_23 73438 73673 multiply connected surface (shared edge)
<<Writing 7 conflicting points to set nonManifoldPoints

Checking geometry...
Domain bounding box: (-0.446233 -0.157002 0.0975904) (-0.198251 0.838998 0.334923)
***Boundary openness (0.000656546 1.6448e-16 1.00521e-14) possible hole in boundary description.
***Open cells found, max cell openness: 1, number of open cells 54
<<Writing 54 non closed cells to set nonClosedCells
Minumum face area = 7.18776e-06. Maximum face area = 2.64301e-05. Face area magnitudes OK.
Min volume = 2.84406e-08. Max volume = 1.0496e-07. Total volume = 0.0442321. Cell volumes OK.
Mesh non-orthogonality Max: 26.3664 average: 3.77831
Non-orthogonality check OK.
Face pyramids OK.
Max skewness = 0.488558 OK.
Min/max edge length = 0.002 0.00617666 OK.
All angles in faces OK.
Face flatness (1 = flat, 0 = butterfly) : average = 0.999997 min = 0.987202
All face flatness OK.

Failed 3 mesh checks.

End"
t42 is offline   Reply With Quote

Old   February 5, 2009, 08:16
Default Hi Marcus, I also use CUBIT
  #2
Senior Member
 
Tian
Join Date: Mar 2009
Location: Berlin, germany
Posts: 102
Rep Power: 8
tian is on a distinguished road
Hi Marcus,

I also use CUBIT 11.1 and I import the mesh in OF with: fluentMeshToFoam.

Did you try it also and checked the mesh again?

Bye
Thomas
__________________
BIM HVACTool, The Green Building Simulation Tool for OpenFOAM, Energy Plus and Radiance.
tian is offline   Reply With Quote

Old   February 5, 2009, 09:10
Default But fluentMeshToFoam is only f
  #3
t42
New Member
 
Denk Marcus
Join Date: Mar 2009
Posts: 13
Rep Power: 8
t42 is on a distinguished road
But fluentMeshToFoam is only for 2D cases, isnīt it ?
t42 is offline   Reply With Quote

Old   February 5, 2009, 09:12
Default But fluentMeshToFoam is only f
  #4
t42
New Member
 
Denk Marcus
Join Date: Mar 2009
Posts: 13
Rep Power: 8
t42 is on a distinguished road
But fluentMeshToFoam is only for 2D cases, isnīt it ?
t42 is offline   Reply With Quote

Old   February 5, 2009, 09:18
Default Hi Marcus, I used it also f
  #5
Senior Member
 
Tian
Join Date: Mar 2009
Location: Berlin, germany
Posts: 102
Rep Power: 8
tian is on a distinguished road
Hi Marcus,

I used it also for 3D cases.

By the way, I got also some crazy error message if I used Fluent to OpenFOAM but all errors arised from my mistake in CUBIT.

Bye
Thomas
__________________
BIM HVACTool, The Green Building Simulation Tool for OpenFOAM, Energy Plus and Radiance.
tian is offline   Reply With Quote

Old   February 5, 2009, 09:20
Default I tried to make fluentMeshToFo
  #6
t42
New Member
 
Denk Marcus
Join Date: Mar 2009
Posts: 13
Rep Power: 8
t42 is on a distinguished road
I tried to make fluentMeshToFoam, but there is still an error:

I post it:

T42@CFD:~/OpenFOAM/OpenFOAM-1.4.1/Cases> fluentMeshToFoam . WPcupopt ./WPcupopt/wpcupgasflowrev.msh -scale 0.001
/*---------------------------------------------------------------------------*\
| ========= | |
| \ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \ / O peration | Version: 1.4.1 |
| \ / A nd | Web: http://www.openfoam.org |
| \/ M anipulation | |
\*---------------------------------------------------------------------------*/

Exec : fluentMeshToFoam . WPcupopt ./WPcupopt/wpcupgasflowrev.msh -scale 0.001
Date : Feb 05 2009
Time : 14:14:03
Host : CFD
PID : 12813
Root : /home/T42/OpenFOAM/OpenFOAM-1.4.1/Cases
Case : WPcupopt
Nprocs : 1
Create time



--> FOAM FATAL ERROR : fluentMeshToFoam: file "./WPcupopt/wpcupgasflowrev.msh" not found

From function fluentToFoam::main(int argc, char *argv[])
in file fluentMeshToFoam.L at line 894.

FOAM exiting

T42@CFD:~/OpenFOAM/OpenFOAM-1.4.1/Cases> fluentMeshToFoam . WPcupopt ./WPcupopt/wpcupgasflow.msh -scale 0.001
/*---------------------------------------------------------------------------*\
| ========= | |
| \ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \ / O peration | Version: 1.4.1 |
| \ / A nd | Web: http://www.openfoam.org |
| \/ M anipulation | |
\*---------------------------------------------------------------------------*/

Exec : fluentMeshToFoam . WPcupopt ./WPcupopt/wpcupgasflow.msh -scale 0.001
Date : Feb 05 2009
Time : 14:14:30
Host : CFD
PID : 12819
Root : /home/T42/OpenFOAM/OpenFOAM-1.4.1/Cases
Case : WPcupopt
Nprocs : 1
Create time

Dimension of grid: 3
Number of points: 744773
Reading points
number of faces: 2155194
Reading uniform faces
Reading uniform faces
Reading uniform faces
Reading uniform faces
Reading uniform faces
Number of cells: 705275
Other readCellGroupData: 18 1 367a3 1 4
Reading uniform cells
Other readCellGroupData: 19 367a4 ac2fb 1 4
Reading uniform cells
Read zone1:3 name:wall_1 patchTypeID:wall
Reading zone data
Read zone1:5 name:interior patchTypeID:interior
Reading zone data
Read zone1:21 name:sideset_zone_21 patchTypeID:wall
Reading zone data
Read zone1:22 name:sideset_zone_22 patchTypeID:wall
Reading zone data
Read zone1:23 name:sideset_zone_23 patchTypeID:wall
Reading zone data
Read zone1:24 name:fluid_1 patchTypeID:fluid
Reading zone data
Read zone1:25 name:fluid_2 patchTypeID:fluid
Reading zone data


FINISHED LEXING


dimension of grid: 3
Creating shapes for 3-D cells
Building patch-less mesh...--> FOAM Warning :
From function polyMesh::polyMesh(... construct from shapes...)
in file meshes/polyMesh/polyMeshFromShapeMesh.C at line 577
Found 78738 undefined faces in mesh; adding to default patch.
done.

Building boundary and internal patches.
Creating patch 0 for zone: 3 start: 1 end: 0 type: wall name: wall_1
Creating patch 1 for zone: 5 start: 1 end: 2076402 type: interior name: interior
Creating patch 2 for zone: 21 start: 2076403 end: 2079079 type: wall name: sideset_zone_21
Creating patch 3 for zone: 22 start: 2079080 end: 2081756 type: wall name: sideset_zone_22
Creating patch 4 for zone: 23 start: 2081757 end: 2155194 type: wall name: sideset_zone_23
#0 Foam::error::printStack(Foam:stream&) in "/home/T42/OpenFOAM/OpenFOAM-1.4.1/lib/linux64GccDPOpt/libOpenFOAM.so"
#1 Foam::sigSegv::sigSegvHandler(int) in "/home/T42/OpenFOAM/OpenFOAM-1.4.1/lib/linux64GccDPOpt/libOpenFOAM.so"
#2 ?? in "/lib64/libc.so.6"
#3 main in "/home/T42/OpenFOAM/OpenFOAM-1.4.1/applications/bin/linux64GccDPOpt/fluentMeshTo Foam"
#4 __libc_start_main in "/lib64/libc.so.6"
#5 __gxx_personality_v0 in "/home/T42/OpenFOAM/OpenFOAM-1.4.1/applications/bin/linux64GccDPOpt/fluentMeshTo Foam"
Speicherzugriffsfehler
T42@CFD:~/OpenFOAM/OpenFOAM-1.4.1/Cases> checkMesh . WPcupopt
/*---------------------------------------------------------------------------*\
| ========= | |
| \ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \ / O peration | Version: 1.4.1 |
| \ / A nd | Web: http://www.openfoam.org |
| \/ M anipulation | |
\*---------------------------------------------------------------------------*/

Exec : checkMesh . WPcupopt
Date : Feb 05 2009
Time : 14:15:23
Host : CFD
PID : 12890
Root : /home/T42/OpenFOAM/OpenFOAM-1.4.1/Cases
Case : WPcupopt
Nprocs : 1
Create time

Create polyMesh for time = constant



--> FOAM FATAL ERROR : Cannot find file "points" in directory "constant/polyMesh"

From function Time::findInstance(const word& dir, const word& name)
in file db/Time/findInstance.C at line 133.

FOAM exiting
t42 is offline   Reply With Quote

Old   February 5, 2009, 09:23
Default I tried to make fluentMeshToFo
  #7
t42
New Member
 
Denk Marcus
Join Date: Mar 2009
Posts: 13
Rep Power: 8
t42 is on a distinguished road
I tried to make fluentMeshToFoam, but there is still an error:

I post it:

T42@CFD:~/OpenFOAM/OpenFOAM-1.4.1/Cases> fluentMeshToFoam . WPcupopt ./WPcupopt/wpcupgasflowrev.msh -scale 0.001
/*---------------------------------------------------------------------------*\
| ========= | |
| \ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \ / O peration | Version: 1.4.1 |
| \ / A nd | Web: http://www.openfoam.org |
| \/ M anipulation | |
\*---------------------------------------------------------------------------*/

Exec : fluentMeshToFoam . WPcupopt ./WPcupopt/wpcupgasflowrev.msh -scale 0.001
Date : Feb 05 2009
Time : 14:14:03
Host : CFD
PID : 12813
Root : /home/T42/OpenFOAM/OpenFOAM-1.4.1/Cases
Case : WPcupopt
Nprocs : 1
Create time



--> FOAM FATAL ERROR : fluentMeshToFoam: file "./WPcupopt/wpcupgasflowrev.msh" not found

From function fluentToFoam::main(int argc, char *argv[])
in file fluentMeshToFoam.L at line 894.

FOAM exiting

T42@CFD:~/OpenFOAM/OpenFOAM-1.4.1/Cases> fluentMeshToFoam . WPcupopt ./WPcupopt/wpcupgasflow.msh -scale 0.001
/*---------------------------------------------------------------------------*\
| ========= | |
| \ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \ / O peration | Version: 1.4.1 |
| \ / A nd | Web: http://www.openfoam.org |
| \/ M anipulation | |
\*---------------------------------------------------------------------------*/

Exec : fluentMeshToFoam . WPcupopt ./WPcupopt/wpcupgasflow.msh -scale 0.001
Date : Feb 05 2009
Time : 14:14:30
Host : CFD
PID : 12819
Root : /home/T42/OpenFOAM/OpenFOAM-1.4.1/Cases
Case : WPcupopt
Nprocs : 1
Create time

Dimension of grid: 3
Number of points: 744773
Reading points
number of faces: 2155194
Reading uniform faces
Reading uniform faces
Reading uniform faces
Reading uniform faces
Reading uniform faces
Number of cells: 705275
Other readCellGroupData: 18 1 367a3 1 4
Reading uniform cells
Other readCellGroupData: 19 367a4 ac2fb 1 4
Reading uniform cells
Read zone1:3 name:wall_1 patchTypeID:wall
Reading zone data
Read zone1:5 name:interior patchTypeID:interior
Reading zone data
Read zone1:21 name:sideset_zone_21 patchTypeID:wall
Reading zone data
Read zone1:22 name:sideset_zone_22 patchTypeID:wall
Reading zone data
Read zone1:23 name:sideset_zone_23 patchTypeID:wall
Reading zone data
Read zone1:24 name:fluid_1 patchTypeID:fluid
Reading zone data
Read zone1:25 name:fluid_2 patchTypeID:fluid
Reading zone data


FINISHED LEXING


dimension of grid: 3
Creating shapes for 3-D cells
Building patch-less mesh...--> FOAM Warning :
From function polyMesh::polyMesh(... construct from shapes...)
in file meshes/polyMesh/polyMeshFromShapeMesh.C at line 577
Found 78738 undefined faces in mesh; adding to default patch.
done.

Building boundary and internal patches.
Creating patch 0 for zone: 3 start: 1 end: 0 type: wall name: wall_1
Creating patch 1 for zone: 5 start: 1 end: 2076402 type: interior name: interior
Creating patch 2 for zone: 21 start: 2076403 end: 2079079 type: wall name: sideset_zone_21
Creating patch 3 for zone: 22 start: 2079080 end: 2081756 type: wall name: sideset_zone_22
Creating patch 4 for zone: 23 start: 2081757 end: 2155194 type: wall name: sideset_zone_23
#0 Foam::error::printStack(Foam:stream&) in "/home/T42/OpenFOAM/OpenFOAM-1.4.1/lib/linux64GccDPOpt/libOpenFOAM.so"
#1 Foam::sigSegv::sigSegvHandler(int) in "/home/T42/OpenFOAM/OpenFOAM-1.4.1/lib/linux64GccDPOpt/libOpenFOAM.so"
#2 ?? in "/lib64/libc.so.6"
#3 main in "/home/T42/OpenFOAM/OpenFOAM-1.4.1/applications/bin/linux64GccDPOpt/fluentMeshTo Foam"
#4 __libc_start_main in "/lib64/libc.so.6"
#5 __gxx_personality_v0 in "/home/T42/OpenFOAM/OpenFOAM-1.4.1/applications/bin/linux64GccDPOpt/fluentMeshTo Foam"
Speicherzugriffsfehler
T42@CFD:~/OpenFOAM/OpenFOAM-1.4.1/Cases> checkMesh . WPcupopt
/*---------------------------------------------------------------------------*\
| ========= | |
| \ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \ / O peration | Version: 1.4.1 |
| \ / A nd | Web: http://www.openfoam.org |
| \/ M anipulation | |
\*---------------------------------------------------------------------------*/

Exec : checkMesh . WPcupopt
Date : Feb 05 2009
Time : 14:15:23
Host : CFD
PID : 12890
Root : /home/T42/OpenFOAM/OpenFOAM-1.4.1/Cases
Case : WPcupopt
Nprocs : 1
Create time

Create polyMesh for time = constant



--> FOAM FATAL ERROR : Cannot find file "points" in directory "constant/polyMesh"

From function Time::findInstance(const word& dir, const word& name)
in file db/Time/findInstance.C at line 133.

FOAM exiting
t42 is offline   Reply With Quote

Old   February 5, 2009, 09:29
Default Hi, maybe you can send me y
  #8
Senior Member
 
Tian
Join Date: Mar 2009
Location: Berlin, germany
Posts: 102
Rep Power: 8
tian is on a distinguished road
Hi,

maybe you can send me your CUB file? This evening I can have a look and test it with OF1.5.

Bye
Thomas
__________________
BIM HVACTool, The Green Building Simulation Tool for OpenFOAM, Energy Plus and Radiance.
tian is offline   Reply With Quote

Old   March 26, 2010, 11:26
Default
  #9
Senior Member
 
stephane sanchi
Join Date: Mar 2009
Posts: 300
Rep Power: 9
openfoam_user is on a distinguished road
Hi Markus,

I have encounter the same problem.

I have generated a 3D mesh with icemcfd hexa and saved the grid in fluent-v6 format.

Then I have used the fluent3DMeshToFoam utility. With success.

Then checkMesh :

Checking geometry...
Overall domain bounding box (-0.05910710787 -2.422435604 -4.610000591) (4.70996259 3.217448683 11.30000039)
Mesh (non-empty, non-wedge) directions (1 1 1)
Mesh (non-empty) directions (1 1 1)
***Boundary openness (0.373133555033 0.0329782447309 -6.55655408494e-11) possible hole in boundary description.
***Open cells found, max cell openness: 1, number of open cells 29457


Have you solved the problem of boundary openness ?

Regards,

Stephane.
openfoam_user is offline   Reply With Quote

Old   March 26, 2010, 11:35
Default
  #10
Senior Member
 
stephane sanchi
Join Date: Mar 2009
Posts: 300
Rep Power: 9
openfoam_user is on a distinguished road
Hi,

To better understand the problem I have attached a picture showing the cells of the nonClosedCells set !

Stephane.
Attached Images
File Type: jpg pict.jpg (94.8 KB, 79 views)
openfoam_user is offline   Reply With Quote

Old   April 7, 2010, 10:56
Default
  #11
Senior Member
 
stephane sanchi
Join Date: Mar 2009
Posts: 300
Rep Power: 9
openfoam_user is on a distinguished road
Hi,

nobody has ever encountered this problem and solved it ?

Stephane.
openfoam_user is offline   Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Boundary conditions for turbulent boundary layer Thomas FLUENT 1 June 17, 2008 05:14
boundary conditions for boundary layer flow A. Al-zoubi CFX 0 November 3, 2007 08:11
Slip Boundary Condition for Moving Boundary Shukla Main CFD Forum 3 November 11, 2005 16:02
pressure boundary VS. mass flow boundary dalton Main CFD Forum 12 April 3, 2005 23:52
Immersed boundary boundary treatment AFP Main CFD Forum 0 January 30, 2004 08:16


All times are GMT -4. The time now is 13:10.