Geometric boundary splitting on PLOT3D mesh

cap_hook · May 24, 2009, 04:47

I'm a newbye of Fluent. Usually I use CFD++ of Metacomp at my college CFD lab. Now they change the package with Fluent and i'm in tilt

.
The problem is the following:i can write the mesh file (2D STRUCTURED) only in PLOT3D format with my pre-processor and i inmport it in Fluent successfully.
But i don't know how to split a generic boundary in two o more part.
For example: i have a 2d structured mesh, body-fitted on a NACA airfoil (like the type D); the boundary is only one and i have to split it in external region, connection region and the airfoil (entering the number of face-cell and their i-j) position.
How can i make it?

Thanks.

Ralf Schmidt · May 24, 2009, 06:33

Hi!

I don't think, that this is possible in Fluent. As far as I know, you cannot split faces in Fluent. Maybe, you can use iso-surfaces....

I had some similar problem once... an I had go back to the geometry generation to do so (http://www.cfd-online.com/Forums/flu...-new-mesh.html).

So, that is the thing i would suggest: Import your mesh to gambit, there you can do all the necessary face split commands and BC definitions.
But I guess, you might lose you mesh when adding new vertices...

Best wishes
Ralf!

cap_hook · May 25, 2009, 09:45

Thank you, Ralph.
Now I'll try with Gambit.

Bye.

May 24, 2009, 04:47	Geometric boundary splitting on PLOT3D mesh	#1
cap_hook New Member Join Date: May 2009 Posts: 2 Rep Power: 0	I'm a newbye of Fluent. Usually I use CFD++ of Metacomp at my college CFD lab. Now they change the package with Fluent and i'm in tilt . The problem is the following:i can write the mesh file (2D STRUCTURED) only in PLOT3D format with my pre-processor and i inmport it in Fluent successfully. But i don't know how to split a generic boundary in two o more part. For example: i have a 2d structured mesh, body-fitted on a NACA airfoil (like the type D); the boundary is only one and i have to split it in external region, connection region and the airfoil (entering the number of face-cell and their i-j) position. How can i make it? Thanks.

May 24, 2009, 06:33		#2
Ralf Schmidt Member Ralf Schmidt Join Date: Mar 2009 Location: Austria Posts: 67 Rep Power: 17	Hi! I don't think, that this is possible in Fluent. As far as I know, you cannot split faces in Fluent. Maybe, you can use iso-surfaces.... I had some similar problem once... an I had go back to the geometry generation to do so (http://www.cfd-online.com/Forums/flu...-new-mesh.html). So, that is the thing i would suggest: Import your mesh to gambit, there you can do all the necessary face split commands and BC definitions. But I guess, you might lose you mesh when adding new vertices... Best wishes Ralf! __________________ CFD - nothing but Colourful Fluid Dynamics

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May 25, 2009, 09:45		#3
cap_hook New Member Join Date: May 2009 Posts: 2 Rep Power: 0	Thank you, Ralph. Now I'll try with Gambit. Bye.