overlap of two meshes

lostking18 · August 23, 2018, 14:51

Hi, guys

If I want to embed a small mesh into the large mesh of a flow passage. Is it possible for CFX to merge the small mesh into the large mesh? I.e. is it possible for CFX to deal with the overlapping volume of two meshes?

I ask this because otherwise I have to empty the space in the large mesh while generating the large mesh. I know that CFX’s powerful GGI interface system can automatically deal with the overlapping part of two mesh surfaces. Although I haven’t found any documents to suggest that CFX can deal with the overlapping volume.

Thank you very much!

ghorrocks · August 23, 2018, 20:06

CFX cannot handle overlapping meshes. You need fluent for that.

The only exception is the immersed solids model uses an overlapping mesh approach, but this is only to model the solid region in a meshed region.

GGI interfaces are used to join mesh regions together where the mesh does not match at the interface. You can do a fine mesh around your region of interest and a coarse mesh further away and join them with a GGI, CFX can do this if this is what you want to do.

lostking18 · August 26, 2018, 07:44

Ghorrocks, thank you very much for your always helpful answers!

August 23, 2018, 14:51	overlap of two meshes	#1
lostking18 Member phd Join Date: Oct 2013 Posts: 76 Rep Power: 13	Hi, guys If I want to embed a small mesh into the large mesh of a flow passage. Is it possible for CFX to merge the small mesh into the large mesh? I.e. is it possible for CFX to deal with the overlapping volume of two meshes? I ask this because otherwise I have to empty the space in the large mesh while generating the large mesh. I know that CFX’s powerful GGI interface system can automatically deal with the overlapping part of two mesh surfaces. Although I haven’t found any documents to suggest that CFX can deal with the overlapping volume. Thank you very much!

August 23, 2018, 20:06		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	CFX cannot handle overlapping meshes. You need fluent for that. The only exception is the immersed solids model uses an overlapping mesh approach, but this is only to model the solid region in a meshed region. GGI interfaces are used to join mesh regions together where the mesh does not match at the interface. You can do a fine mesh around your region of interest and a coarse mesh further away and join them with a GGI, CFX can do this if this is what you want to do. lostking18 likes this. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Mapping (interpolation) between two meshes	Ebrahim	OpenFOAM Programming & Development	2	June 15, 2020 14:31
[mesh manipulation] Multiple overlapping meshes	koala	OpenFOAM Meshing & Mesh Conversion	1	February 1, 2017 06:53
How can I put the data of adpated meshes on the original unadapted meshes?	xh110120	FLUENT	2	March 11, 2016 03:00
Hex and Tet meshes - simplefoam comparison	danvica	OpenFOAM Running, Solving & CFD	10	January 4, 2013 02:18
Getting prism to inflate into mixed tet-hex meshes	Joe	CFX	16	October 10, 2011 08:06

August 26, 2018, 07:44		#3
lostking18 Member phd Join Date: Oct 2013 Posts: 76 Rep Power: 13	Ghorrocks, thank you very much for your always helpful answers!