[ANSYS Meshing] Interface between hexa and triangular domains

robboflea · February 7, 2012, 09:50

Dear all,

I'm modelling a 2D geometry in which I need to analyze both fluid and solid domains.
I meshed the fluid with hexa mesh but i need the solid to be meshed with unstructured triangular elements. I managed to do so but I don't know how to make the nodes matching at the interface between the two boundaries. Is there a way to force the build-up of the unstructured mesh using the nodes on the structured side?

Any help is appreciated.
Thanks a lot,

Rob

robboflea · February 7, 2012, 11:11

I saw that on the "edit mesh" tab there is a "merge nodes" option but apparently it works only for volume meshes.
Does anyone know how to overcome this problem?

Rob

PSYMN · February 8, 2012, 20:44

Fill the triangular mesh with tetras using delaunay... merge, then delete...

But after the merge, you won't have tri mesh, you will have quads...

Is there some reason you want triangle mesh?

evcelica · February 24, 2012, 21:26

When creating your geometry make sure you "form new part" from the two bodies. This makes the node points match
In meshing:
1.) Suppress solid body
2.) Generate mesh of fluid body.
3.) Unsuppress solid body
4.) I don't do 2D but in 3D I would do sweep method, specify source and target faces and select "All Tri"

February 7, 2012, 09:50	Interface between hexa and triangular domains	#1
robboflea Senior Member Join Date: Nov 2011 Posts: 109 Rep Power: 14	Dear all, I'm modelling a 2D geometry in which I need to analyze both fluid and solid domains. I meshed the fluid with hexa mesh but i need the solid to be meshed with unstructured triangular elements. I managed to do so but I don't know how to make the nodes matching at the interface between the two boundaries. Is there a way to force the build-up of the unstructured mesh using the nodes on the structured side? Any help is appreciated. Thanks a lot, Rob

February 8, 2012, 20:44		#3
PSYMN Senior Member Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,663 Blog Entries: 1 Rep Power: 47	Fill the triangular mesh with tetras using delaunay... merge, then delete... But after the merge, you won't have tri mesh, you will have quads... Is there some reason you want triangle mesh? __________________ ----------------------------------------- Please help guide development at ANSYS by filling in these surveys Public ANSYS ICEM CFD Users Survey This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)... CFD Online Users Survey

February 7, 2012, 11:11		#2
robboflea Senior Member Join Date: Nov 2011 Posts: 109 Rep Power: 14	I saw that on the "edit mesh" tab there is a "merge nodes" option but apparently it works only for volume meshes. Does anyone know how to overcome this problem? Rob

February 24, 2012, 21:26		#4
evcelica Senior Member Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 1,167 Rep Power: 23	When creating your geometry make sure you "form new part" from the two bodies. This makes the node points match In meshing: 1.) Suppress solid body 2.) Generate mesh of fluid body. 3.) Unsuppress solid body 4.) I don't do 2D but in 3D I would do sweep method, specify source and target faces and select "All Tri"