Is it possible to export a mesh from FLUENT in v18/19?

Time4Tea · June 25, 2019, 16:09

I have seen some other questions about this; however, they seem a bit out-of-date. Is it possible to export a mesh file from FLUENT in either version 18 or 19? (From the main FLUENT program, not FLUENT meshing)

For example, I have a tet mesh that I made in ANSYS and then converted to polyhedral in FLUENT. I would like to export the polyhedral mesh file and import it into OpenFOAM.

LuckyTran · June 28, 2019, 10:27

There are two openfoam utilities for this: fluentMeshToFoam and fluent3DMeshToFoam.
Have you looked into these? I don't get what's so special about Fluent 18/19.

Time4Tea · June 28, 2019, 11:08

@LuckyTran: I am trying to use fluentMeshToFoam to convert from FLUENT mesh format to OF. However, unless I am mistaken, I understand those tools work on a .msh file, not the FLUENT .cas file.

So, my question is whether it is possible to export a .msh file from FLUENT, for those specific versions?

lev · July 2, 2019, 13:02

Hi,

I couldn't find the direct method/command to export a .msh file from Fluent (v19.1). Instead I'm doing the followings to get the .msh file from .cas file:

1. In Fluent Solution Mode (normal mode), write a .cas file
2. Launch Fluent in the Meshing Mode by ticking "Meshing Mode" in the Fluent Launcher
3. Read the .cas file just saved by File>Read>Mesh... then it prompt "Reading a case file as a mesh file results in loss of boundary conditions." Press OK.
4. Write the mesh as .msh by File>Write>Mesh...

There may be a better way but this worked for me, though I haven't tried with polyhedral mesh.

LuckyTran · July 2, 2019, 13:43

You can use fluentMeshtoFoam on a case file

A fluent .msh file is just a stripped down .cas file

Time4Tea · July 2, 2019, 16:28

Ok, thanks to you both for the info. This is very helpful.

June 25, 2019, 16:09	Is it possible to export a mesh from FLUENT in v18/19?	#1
Time4Tea Senior Member Lee Strobel Join Date: Jun 2016 Posts: 133 Rep Power: 9	I have seen some other questions about this; however, they seem a bit out-of-date. Is it possible to export a mesh file from FLUENT in either version 18 or 19? (From the main FLUENT program, not FLUENT meshing) For example, I have a tet mesh that I made in ANSYS and then converted to polyhedral in FLUENT. I would like to export the polyhedral mesh file and import it into OpenFOAM.

July 2, 2019, 13:02		#4
lev New Member Join Date: May 2017 Posts: 1 Rep Power: 0	Hi, I couldn't find the direct method/command to export a .msh file from Fluent (v19.1). Instead I'm doing the followings to get the .msh file from .cas file: 1. In Fluent Solution Mode (normal mode), write a .cas file 2. Launch Fluent in the Meshing Mode by ticking "Meshing Mode" in the Fluent Launcher 3. Read the .cas file just saved by File>Read>Mesh... then it prompt "Reading a case file as a mesh file results in loss of boundary conditions." Press OK. 4. Write the mesh as .msh by File>Write>Mesh... There may be a better way but this worked for me, though I haven't tried with polyhedral mesh. 8cold8hot, linyanx, lukasf and 3 others like this.

July 2, 2019, 13:43		#5
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,673 Rep Power: 65	You can use fluentMeshtoFoam on a case file A fluent .msh file is just a stripped down .cas file 8cold8hot and Haitham Osman CFD like this.

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June 28, 2019, 10:27		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,673 Rep Power: 65	There are two openfoam utilities for this: fluentMeshToFoam and fluent3DMeshToFoam. Have you looked into these? I don't get what's so special about Fluent 18/19.

June 28, 2019, 11:08		#3
Time4Tea Senior Member Lee Strobel Join Date: Jun 2016 Posts: 133 Rep Power: 9	@LuckyTran: I am trying to use fluentMeshToFoam to convert from FLUENT mesh format to OF. However, unless I am mistaken, I understand those tools work on a .msh file, not the FLUENT .cas file. So, my question is whether it is possible to export a .msh file from FLUENT, for those specific versions?

July 2, 2019, 16:28		#6
Time4Tea Senior Member Lee Strobel Join Date: Jun 2016 Posts: 133 Rep Power: 9	Ok, thanks to you both for the info. This is very helpful.