[Mark JIN]

Hi friends,

I was an ansys user and now is atarting with openfoam for my cfd analysis. After understanding some openfoam basics, I was trying to convert fluent mesh into openfoam format, but some errors came, not sure what's the problem, maybe complexity or naming..

Just want to understand what could be an effective way to build complex geometry (such as an urban site with building windows open) and have openfoam to read it, any thrid party software available?

Thanks a lot!

Mark

[g.freeman]

Originally Posted by Mark JIN

Hi friends,

I was an ansys user and now is atarting with openfoam for my cfd analysis. After understanding some openfoam basics, I was trying to convert fluent mesh into openfoam format, but some errors came, not sure what's the problem, maybe complexity or naming..

Just want to understand what could be an effective way to build complex geometry (such as an urban site with building windows open) and have openfoam to read it, any thrid party software available?

Thanks a lot!

Mark

Can you report the error? I often make my mesh in ICEM and then convert it in OF without any problem.

This could also be useful for you: http://cfd.direct/openfoam/user-guid...#x27-1940005.5

[Mark JIN]

Originally Posted by g.freeman

Can you report the error? I often make my mesh in ICEM and then convert it in OF without any problem.

This could also be useful for you: http://cfd.direct/openfoam/user-guid...#x27-1940005.5

Thanks for ur help, here is my error.
I built solid blocks through design modeller and created enclosure. Then I suppressed the solid bodies (with only enclosure left) and gave 'inlet' 'outlet' naming only.


markjin@markjin-VirtualBox:~/OpenFOAM/markjin-4.0/run/Case3$ fluentMeshToFoam Case3.msh
/*---------------------------------------------------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 4.0 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
Build : 4.0-665f1db4c1f1
Exec : fluentMeshToFoam Case3.msh
Date : Sep 15 2016
Time : 18:51:23
Host : "markjin-VirtualBox"
PID : 4063
Case : /home/markjin/OpenFOAM/markjin-4.0/run/Case3
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster
allowSystemOperations : Allowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

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Embedded blocks in comment or unknown
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Dimension of grid: 3
Number of points: 10036

number of faces: 26210
Number of cells: 8129
Reading points
Reading points
Reading mixed faces
Reading mixed faces
Reading mixed faces
Reading mixed faces
Other readCellGroupData: 2 1 1fc1 1 0
Reading mixed cells
Read zone1:1 name:interior-solid patchTypeID:interior
Reading zone data
Read zone1:2 name:solid patchTypeID:fluid
Reading zone data
Read zone1:5 name:inlet patchTypeID:velocity-inlet
Reading zone data
Read zone1:6 name outlet patchTypeID pressure-outlet
Reading zone data
Read zone1:7 name:wall-solid patchTypeID:wall
Reading zone data


FINISHED LEXING


#0 Foam::error: printStack(Foam::Ostream&) at ??:?
#1 Foam::sigSegv::sigHandler(int) at ??:?
#2 ? in "/lib/x86_64-linux-gnu/libc.so.6"
#3 ? at ??:?
#4 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
#5 ? at ??:?
Segmentation fault (core dumped)
markjin@markjin-VirtualBox:~/OpenFOAM/markjin-4.0/run/Case3$

[Tobi]

Hi,

I can not help you with the ICEM import (I did it only for simple 2D cases during my study time) but for 6 years now, I am using snappyHexMesh for everything. See the wiki site, the openfoam tutorials or check out my website. The next two tutorials that I will publish are:

• Sphere, Diffusor combustion chamber
• Jet-Engine Turbine

[Mark JIN]

Originally Posted by Tobi

Hi,

I can not help you with the ICEM import (I did it only for simple 2D cases during my study time) but for 6 years now, I am using snappyHexMesh for everything. See the wiki site, the openfoam tutorials or check out my website. The next two tutorials that I will publish are:

• Sphere, Diffusor combustion chamber
• Jet-Engine Turbine

Hi Tobi, thanks for your help. May I describe my case here? It would be great if you get time to give any sugguestion!

Simply, I want to use openfoam for natural ventilation analysis. I will need to build a cluster of buildings and an enclosure around them where wind blows within the enclosure, that's what I did using 'Ansys design modeller and meshing' before. But it seems it is not workable when I do 'fluentMeshToFoam' trying to convert boths buildings and enclousre in the meantime.

I saw some talks about snappyHexMesh and Salome, is it true that I need to export building geometry and enclosure geometry seperately into STL format that openfoam can read? Do you have any sugguestion?

Thank you so much!!!