[mbahaa]

Hello,

I have been trying to create wall inflation around a corner shared by 3 different bodies belonging to the same part.

I have tried advanced inflation settings with all three collision avoidance techniques (None, Compression and Stair Stepping) and many other settings too (Max. Angle, Pre/Post, etc...), but the mesh quality is always either horribly bad or not sufficiently good.

I need to use 2D "MultiZone" method along with the multi-body part approach because this results in very good mesh quality with very uniform and "structured" like quadrilateral grid, and also better edge sizing and bias control.

I managed to get good inflation around the corner using MultiZone method but only when using a single-body part, but that yields less control over zones that should get a finer mesh/bias around them.

I attached screenshots of the situation.

Thanks in advance for everybody.

[Gert-Jan]

What you are trying to accomplish is impossible as long as you try to create an unstructred mesh (either hex, or tet/prisms). The only way is to setup a structured hex mesh using a blocking structure. This can be done in e.g. ICEM-Hexa.

[Far]

ICEM CFD hexa is the best option. You can start with these basic tuts:

https://www.youtube.com/edit?o=U&video_id=CYz3HxuuXyw
https://www.youtube.com/edit?o=U&video_id=ys1tOPp0NJY

For similar case, i have tried in gambit. You can do same in ansys meshing. Use design modeler to split geometry in a way so that you can control meshing as you want.
https://www.youtube.com/watch?v=Gub1Kbcup2k

[mbahaa]

@Gert-Jan @Fan

Thanks alot for your helpful input, you were right that I had to use some structured blocking approach in Designmodeler (since Ansys Mesher does not offer blocking capabilities, unlike ICEM), also the sample gemoetry/mesh data from this post by @siw was very helpful (inflation around a cube)

Attached are screenshots of the mesh after applying this approach, I think this is pretty good.

Thanks again

[Far]

thats what we also achieve in icem cfd. Only difference is that in icem cfd you can change boundary layer mesh width on the fly. while in ansys meshing you have to go back to design modeller and edit it

[siw]

Unfortunately, ANSYS Meshing does not allow inflation to bend around a corner where the corner separates the bodies, even if the bodies are in a MultiBody part. Another option (one that I don't like for my applications) is to have the split between the bodies just a little way from the corner (see attached).