[pawansharma]

Hiii,
After creating group of the mesh in salome i tried to covert .unv file into openfoam format but after running the <ideasUnvToFoam symmetric-mesh.unv>i m getting fatal errors which i'm attaching below




kuldeep@kuldeep-HP-15-TS-Notebook-PC:~/OpenFOAM/kuldeep-6/run/tutorials/incompressible/icoFoam/symmetric-mesh$ ls
symmetric-mesh.unv system
kuldeep@kuldeep-HP-15-TS-Notebook-PC:~/OpenFOAM/kuldeep-6/run/tutorials/incompressible/icoFoam/symmetric-mesh$ ideasUnvToFoam symmetric-mesh.unv
/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Version: 6
\\/ M anipulation |
\*---------------------------------------------------------------------------*/
Build : 6-d3fd147e6c65
Exec : ideasUnvToFoam symmetric-mesh.unv
Date : Dec 02 2018
Time : 16:11:59
Host : "kuldeep-HP-15-TS-Notebook-PC"
PID : 20491
I/O : uncollated
Case : /home/kuldeep/OpenFOAM/kuldeep-6/run/tutorials/incompressible/icoFoam/symmetric-mesh
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 10)
allowSystemOperations : Allowing user-supplied system call operations

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

Processing tag:164
Starting reading units at line 3.
l:1
units:" SI: Meter (newton)"
unitType:2
Unit factors:
Length scale : 1
Force scale : 1
Temperature scale : 1
Temperature offset : 273.15


Processing tag:2420
Skipping tag 2420 on line 9
Skipping section at line 9.

Processing tag:2411
Starting reading points at line 20.
Read 87751 points.

Processing tag:2412
Starting reading cells at line 175525.
First occurrence of element type 22 for cell 1 at line 175526
--> FOAM Warning :
From function void readCells(Foam::IFstream&, Foam:ynamicList<Foam::cellShape>&, Foam:ynamicList<int>&, Foam:ynamicList<int>&, Foam:ynamicList<Foam::face>&, Foam:ynamicList<int>&, Foam:ynamicList<int>&)
in file ideasUnvToFoam.C at line 463
Reading "symmetric-mesh.unv" at line 175526
Cell type 22 not supported


--> FOAM FATAL IO ERROR:
Attempt to get back from bad stream

file: IStringStream.sourceFile at line 0.

From function bool Foam::Istream::getBack(Foam::token&)
in file db/IOstreams/IOstreams/Istream.C at line 56.

FOAM exiting

kuldeep@kuldeep-HP-15-TS-Notebook-PC:~/OpenFOAM/kuldeep-6/run/tutorials/incompressible/icoFoam/symmetric-mesh$

[pete20r2]

Extrude the mesh a nominal amount (1m, 0.001mm, whatever is easy), 2d elements are not supported by OF ( cell type 22 )

[pawansharma]

can you please explain me in detail the solution as i'm new to openfoam

[simrego]

Hi!


If you try to import a 2D mesh into openfoam it will blow up.
If you have a 2D problem you still need a 3D mesh, but only 1 cell in the 3rd dimension.
So in salome extrude your mesh with 1 cell thickness. Then you can import it.
The thickness of the cell is up to you. The solver won't solve the equations in the 3rd dimension so it can be anything.

[pawansharma]

i'm having 3d problem as i meshed it using netgen 1d-2d-3d. How to convert it into 3d mesh because i'm trying to extrude it but it is not able to do that. suggest me the solution please.

[pawansharma]

i have reached upto this but after giving the command <paraFoam> paraFoam opens and then closes. i'm attatching the error shown in the command terminal





FOAM exiting

Segmentation fault (core dumped)
kuldeep@kuldeep-HP-15-TS-Notebook-PC:~/OpenFOAM/kuldeep-6/run/tutorials/incompressible/icoFoam/symmetric-mesh$ paraFoam
Created temporary 'symmetric-mesh.OpenFOAM'
I/O : uncollated


--> FOAM FATAL IO ERROR:

patch type 'patch' not constraint type 'empty'
for patch walls of field p in file "/home/kuldeep/OpenFOAM/kuldeep-6/run/tutorials/incompressible/icoFoam/symmetric-mesh/0/p"

file: /home/kuldeep/OpenFOAM/kuldeep-6/run/tutorials/incompressible/icoFoam/symmetric-mesh/0/p.boundaryField.walls from line 35 to line 35.

From function Foam::emptyFvPatchField<Type>::emptyFvPatchField(c onst Foam::fvPatch&, const Foam:imensionedField<Type, Foam::volMesh>&, const Foam::dictionary&) [with Type = double]
in file fields/fvPatchFields/constraint/empty/emptyFvPatchField.C at line 80.

FOAM exiting

Segmentation fault (core dumped)
kuldeep@kuldeep-HP-15-TS-Notebook-PC:~/OpenFOAM/kuldeep-6/run/tutorials/incompressible/icoFoam/symmetric-mesh$

[simrego]

The boundaty definition is inconsistent for the "walls" patch.
In the p file you set empty type for the patch, but in your mesh definition (constant/polyMesh/boundary) the type is patch.
You can just rewrite the type in the constant/polyMesh/boundary file, or you can use changeDictionary, but I think the simplest if you just overwrite it by hand.
Of course if you will have to do it many times (ie. parameter study), you should use an utility for automatization.

[rakesh.a]

Originally Posted by simrego

Hi!


If you try to import a 2D mesh into openfoam it will blow up.
If you have a 2D problem you still need a 3D mesh, but only 1 cell in the 3rd dimension.
So in salome extrude your mesh with 1 cell thickness. Then you can import it.
The thickness of the cell is up to you. The solver won't solve the equations in the 3rd dimension so it can be anything.

I'm running problem with only 3D mesh (converted from 3D CAD mdel). Selecting mesh with tetrahedral elements. How can I eliminate type 22 elements.
Apologies for reopening this old post.