[gschaider]

@converting: I take the mesh as provided by Hakan import it into Gambit as a Fluent-mesh and without further manipulation export it again as a Fluent mesh (the points seem to be renumbere mesh)

The mesh seems to be a pure Hex mesh. Nothing special. But maybe Hakan can tell us more.

@all patches in one: I could only do that in Gambit (or maybe with Emacs, if I knew the format well enough), but then the error goes away as explained above.

[hjasak]

Re the original Gambit converter message from Ghanshyam Singh: the cell numbering in FOAM and Gambit will be identical, so you can find out which cells the problem face is between and with that got back to Gambit/TGrid and find out what's going on with the two cells.

Enjoy,

Hrv

[hani]

I've been away for one day, so that's why I didn't answer any of your messages. I'll try to do it now:

I have tried to remove the internal patches with ICEM, without success in the conversion.

There are only Hex cells.

I have imported and exported the mesh with Gambit as proposed by Bernhard. First of all, the boundary conditions were all mixed for some reason. The names do not correspond to the original names, that's why some walls are "internal". If I just exported it to Fluent format I still had the same problem. If I change the internal patches to internal in Gambit before exporting to Fluent format it can be converted using fluenMeshToFoam, and the internal patches are put in constant/polyMesh/sets. I tried this procedure before, but then the mesh was in binary format and Gambit wouldn't read it.

I have also tried just changing the internal patches to "internal" in the file, and it does of course not work for me either. I tried both changing the original names for the internal patches to "internal" and also the same as Bernhard described.

I can't make any sense out of this - I guess that I will have to use ICEM to convert binary to ascii and then update the boundary conditions with Gambit before I use fluentMeshToFoam.

Now, How can I use the internal patches that is defined in constant/polyMesh/sets to write out the results at those planes?

Håkan

[mattijs]

- you can make them (faceSets) into external patches using the splitMesh utility (discussed before)

- create a cellSet from the cells on one/both sides of the faceSet using the cellSet utility. Visualize the results on the cells with foamToVTK

[gschaider]

Hi Hakan.

If you want to do calculations on the surfaces defined by the faceSets you can do so by using the concept described in

http://openfoamwiki.net/index.php/Snip_access_cel lset_data

[olivier]

hi
I have 2 zones of fluid, separated by wall.
when I do this in blockMesh I have
------------------------------------------
FOAM FATAL ERROR : Trying to specify a boundary face 4(8 10 11 9) on the face on cell 0 which is either an internal face or already belongs to some other patch.
This is face 3 of patch 1 named fixedWalls.
-----------------------------------------------
can someone tell me how can I do this?
thanks a lot
convertToMeters 0.1;
------------------------
vertices
(
(0 0 0)
(1 0 0)
(1 1 0)
(0 1 0)
(0 0 0.1)
(1 0 0.1)
(1 1 0.1)
(0 1 0.1)
(0 0.5 0)
(1 0.5 0)
(0 0.5 0.1)
(1 0.5 0.1)
);

blocks
(
hex (0 1 9 8 4 5 11 10) (20 20 2) simpleGrading (1 1 1)
hex (8 9 2 3 10 11 6 7) (20 20 2) simpleGrading (1 1 1)
);

edges
(
);

patches
(
wall movingWall
(
(3 7 6 2)
)
wall fixedWalls
(
(0 4 10 8)
(2 6 11 9)
(1 5 4 0)
(8 10 11 9 )
)
empty frontAndBack
(
(0 8 9 1)
(8 3 2 9)
(4 5 11 10)
(10 11 6 7)
)
);

mergePatchPairs
(
);

hello,

I am trying to convert a mesh with internal faces on openFoam 1.4 .The original fluentMeshtoFOam utility does not wirte polymesh/sets or faceSets, so I compiled fluentMeshtoFoamWithInternals but I get the following error:

SOURCE=fluentMeshToFoamWithInternals.L ; flex++ -f $SOURCE ; mv lex.yy.cc Make/linux64Gcc4DPOpt/fluentMeshToFoamWithInternals.C ; g++ -m64 -Dlinux64 -DDP -Wall -Wno-strict-aliasing -Wextra -Wno-unused-parameter -Wold-style-cast -march=opteron -O3 -DNoRepository -ftemplate-depth-40 -I/home/mgo/OpenFOAM/OpenFOAM-1.4/src/meshTools/lnInclude -IlnInclude -I. -I/home/mgo/OpenFOAM/OpenFOAM-1.4/src/OpenFOAM/lnInclude -fPIC -c Make/linux64Gcc4DPOpt/fluentMeshToFoamWithInternals.C -o Make/linux64Gcc4DPOpt/fluentMeshToFoamWithInternals.o
/bin/sh: flex++: command not found
mv: cannot stat `lex.yy.cc': No such file or directory
g++: Make/linux64Gcc4DPOpt/fluentMeshToFoamWithInternals.C: No such file or directory
g++: no input files
make: *** [Make/linux64Gcc4DPOpt/fluentMeshToFoamWithInternals.o] Error 1

Can anybody help me with this error.

Mayank.

[msrinath80]

flex++ needs to be installed. Search for the flex++ package on yum/yast2/synaptic etc. depending on which GNU/Linux distro you use. Also install the corresponding devel package to be safe.

thanks for your reply.i installed flex++ but still there is error:

Making dependency list for source file extrudedTriangleCellShape.C
Making dependency list for source file extrudedQuadCellShape.C
Making dependency list for source file create3DCellShape.C
Making dependency list for source file fluentMeshToFoamWithInternals.L
SOURCE=extrudedTriangleCellShape.C ; g++ -m64 -Dlinux64 -DDP -Wall -Wno-strict-aliasing -Wextra -Wno-unused-parameter -Wold-style-cast -march=opteron -O3 -DNoRepository -ftemplate-depth-40 -I/home/mgo/OpenFOAM/OpenFOAM-1.4/src/meshTools/lnInclude -IlnInclude -I. -I/home/mgo/OpenFOAM/OpenFOAM-1.4/src/OpenFOAM/lnInclude -fPIC -c $SOURCE -o Make/linux64Gcc4DPOpt/extrudedTriangleCellShape.o
SOURCE=extrudedQuadCellShape.C ; g++ -m64 -Dlinux64 -DDP -Wall -Wno-strict-aliasing -Wextra -Wno-unused-parameter -Wold-style-cast -march=opteron -O3 -DNoRepository -ftemplate-depth-40 -I/home/mgo/OpenFOAM/OpenFOAM-1.4/src/meshTools/lnInclude -IlnInclude -I. -I/home/mgo/OpenFOAM/OpenFOAM-1.4/src/OpenFOAM/lnInclude -fPIC -c $SOURCE -o Make/linux64Gcc4DPOpt/extrudedQuadCellShape.o
SOURCE=create3DCellShape.C ; g++ -m64 -Dlinux64 -DDP -Wall -Wno-strict-aliasing -Wextra -Wno-unused-parameter -Wold-style-cast -march=opteron -O3 -DNoRepository -ftemplate-depth-40 -I/home/mgo/OpenFOAM/OpenFOAM-1.4/src/meshTools/lnInclude -IlnInclude -I. -I/home/mgo/OpenFOAM/OpenFOAM-1.4/src/OpenFOAM/lnInclude -fPIC -c $SOURCE -o Make/linux64Gcc4DPOpt/create3DCellShape.o
SOURCE=fluentMeshToFoamWithInternals.L ; flex++ -f $SOURCE ; mv lex.yy.cc Make/linux64Gcc4DPOpt/fluentMeshToFoamWithInternals.C ; g++ -m64 -Dlinux64 -DDP -Wall -Wno-strict-aliasing -Wextra -Wno-unused-parameter -Wold-style-cast -march=opteron -O3 -DNoRepository -ftemplate-depth-40 -I/home/mgo/OpenFOAM/OpenFOAM-1.4/src/meshTools/lnInclude -IlnInclude -I. -I/home/mgo/OpenFOAM/OpenFOAM-1.4/src/OpenFOAM/lnInclude -fPIC -c Make/linux64Gcc4DPOpt/fluentMeshToFoamWithInternals.C -o Make/linux64Gcc4DPOpt/fluentMeshToFoamWithInternals.o
stdin:14911: m4: Warning: Excess arguments to built-in `m4_ifdef' ignored
lex.yy.cc: In member function 'virtual int yyFlexLexer::yylex()':
lex.yy.cc:12072: warning: use of old-style cast
lex.yy.cc:12072: warning: use of old-style cast
lex.yy.cc:12088: warning: use of old-style cast
lex.yy.cc:12906: warning: use of old-style cast
lex.yy.cc: In member function 'int yyFlexLexer::yy_get_next_buffer()':
lex.yy.cc:13154: warning: use of old-style cast
lex.yy.cc:13177: warning: use of old-style cast
lex.yy.cc:13190: warning: use of old-style cast
lex.yy.cc:13190: warning: use of old-style cast
lex.yy.cc:13211: warning: use of old-style cast
lex.yy.cc: In member function 'yy_state_type yyFlexLexer::yy_get_previous_state()':
lex.yy.cc:13258: warning: use of old-style cast
lex.yy.cc:13258: warning: use of old-style cast
lex.yy.cc: In member function 'void yyFlexLexer::yyunput(int, char*)':
lex.yy.cc:13318: warning: use of old-style cast
lex.yy.cc:13319: warning: use of old-style cast
lex.yy.cc:13327: warning: use of old-style cast
lex.yy.cc: In member function 'int yyFlexLexer::yyinput()':
lex.yy.cc:13394: warning: use of old-style cast
lex.yy.cc: In member function 'virtual yy_buffer_state* yyFlexLexer::yy_create_buffer(std::istream*, int)':
lex.yy.cc:13472: warning: use of old-style cast
lex.yy.cc:13481: warning: use of old-style cast
lex.yy.cc: In member function 'virtual void yyFlexLexer::yy_delete_buffer(yy_buffer_state*)':
lex.yy.cc:13503: warning: use of old-style cast
lex.yy.cc:13506: warning: use of old-style cast
lex.yy.cc:13508: warning: use of old-style cast
lex.yy.cc: In member function 'void yyFlexLexer::yyensure_buffer_stack()':
lex.yy.cc:13635: warning: use of old-style cast
lex.yy.cc:13653: warning: use of old-style cast
lex.yy.cc: In member function 'void yyFlexLexer::yy_push_state(int)':
lex.yy.cc:13671: warning: use of old-style cast
lex.yy.cc:13674: warning: use of old-style cast
lex.yy.cc:13674: warning: use of old-style cast
lex.yy.cc: In function 'void* yyalloc(yy_size_t)':
lex.yy.cc:13754: warning: use of old-style cast
lex.yy.cc: In function 'void* yyrealloc(void*, yy_size_t)':
lex.yy.cc:13766: warning: use of old-style cast
lex.yy.cc:13766: warning: use of old-style cast
lex.yy.cc: In function 'void yyfree(void*)':
lex.yy.cc:13771: warning: use of old-style cast
g++ -m64 -Dlinux64 -DDP -Wall -Wno-strict-aliasing -Wextra -Wno-unused-parameter -Wold-style-cast -march=opteron -O3 -DNoRepository -ftemplate-depth-40 -I/home/mgo/OpenFOAM/OpenFOAM-1.4/src/meshTools/lnInclude -IlnInclude -I. -I/home/mgo/OpenFOAM/OpenFOAM-1.4/src/OpenFOAM/lnInclude -fPIC Make/linux64Gcc4DPOpt/extrudedTriangleCellShape.o Make/linux64Gcc4DPOpt/extrudedQuadCellShape.o Make/linux64Gcc4DPOpt/create3DCellShape.o Make/linux64Gcc4DPOpt/fluentMeshToFoamWithInternals.o -L/home/mgo/OpenFOAM/OpenFOAM-1.4/lib/linux64Gcc4DPOpt \
-lmeshTools -lOpenFOAM -liberty -ldl -lm -o /home/mgo/OpenFOAM/mgo-1.4/applications/bin/linux64Gcc4DPOpt/fluentMeshToFoamWit hInternals
/usr/lib/../lib64/crt1.o: In function `_start':
init.c.text+0x20): undefined reference to `main'
collect2: ld returned 1 exit status
make: *** [/home/mgo/OpenFOAM/mgo-1.4/applications/bin/linux64Gcc4DPOpt/fluentMeshToFoamWi thInternals] Error 1

[helmut]

Hi,

I think the capability of fluentMeshToFoamWithInternals was added to fluentMeshToFoam in the 1.1 release. See the message above from Bernhard Gschaider on Wednesday, March 30, 2005

Mayank,

This seems to be related to the problem I had

http://www.cfd-online.com/cgi-bin/Op...how.cgi?1/4610

mabey its an issue with the newer version of flex

Mayank,

I may have a fix for you.

edit the fluentMeshToFoamWithInternals.L and change all occurrences of "]]" to "] ]"

Hello conn,

thanks for your help ,it worked but i think fluentMeshtoFoamWithInternals is obsolete as mentioned earlier.
I still have problems converting meshes from fluent with internal wall.The following message is dispayed, that is no error is there but internal faces are not written in polymesh/sets/faceSets.

Building boundary and internal patches.
Creating patch 0 for zone: 10 start: 1 end: 1596 type: interior name: int_INTERNAL
Creating patch 1 for zone: 11 start: 1597 end: 8760 type: interior name: int_FLUID
Creating patch 2 for zone: 12 start: 8761 end: 9864 type: wall name: WALL
Creating patch 3 for zone: 13 start: 9865 end: 10008 type: wall name: INLET
Creating patch 4 for zone: 14 start: 10009 end: 10152 type: wall name: OUTLET
Creating patch 5 for zone: 15 start: 10153 end: 10632 type: wall name: INTERNAL
Patch int_INTERNAL is internal to the mesh and is not being added to the boundary.
Patch int_FLUID is internal to the mesh and is not being added to the boundary.
Adding new patch WALL of type wall as patch 0
Adding new patch INLET of type wall as patch 1
Adding new patch OUTLET of type wall as patch 2
Patch INTERNAL is internal to the mesh and is not being added to the boundary.

Default patch type set to empty

Checking mesh...done.


Writing mesh... to "constant/polyMesh" done.

Internal walls just disappear.How to write internal faces to sets dir. ?

[gascortado]

wrong post sorry

[gascortado]

does anyone have the answer to Ali's questions above? I have the same problem. Thanks