[snappyHexMesh] Avoid mesh "bumping"

Miguel Hernandez · January 9, 2022, 12:58

Hello to everyone,
In an interfoam simulation I'm in-countering some stability problems, my idea is that these problems are due to the poor mesh.
But, what I'd like to ask is normal to have a sort of rough surface, to be more specific:
in postprocesing (paraview) I checked the results using a clip over a scalar (alpha.water) equal to 0.5 in order to visualize only water; the results are shown in the figure below.

Is normal to have this kind of "rough" - unnaturally regular - pattern on the water surface?
How can I avoid it?

Thanks...

Miguel

Schermata 2022-01-09 alle 18.52.24.jpg

Miguel Hernandez · January 19, 2022, 09:35

Can this be related to some paraview's graphical issues?

AtoHM · January 21, 2022, 01:41

Would you show your mesh resolution/type?
Using point data in Paraview can smooth out a bit, don't know what you are using here.

Miguel Hernandez · January 31, 2022, 05:50

Quote:

Originally Posted by AtoHM

Would you show your mesh resolution/type?
Using point data in Paraview can smooth out a bit, don't know what you are using here.

Thank you for your reply, I have solved the problem by decreasing the cells dimension in the blockMesh.

January 9, 2022, 12:58	Avoid mesh "bumping"	#1
Miguel Hernandez Member Miguel Hernandez Join Date: Feb 2021 Location: En mi casa Posts: 56 Rep Power: 5	Hello to everyone, In an interfoam simulation I'm in-countering some stability problems, my idea is that these problems are due to the poor mesh. But, what I'd like to ask is normal to have a sort of rough surface, to be more specific: in postprocesing (paraview) I checked the results using a clip over a scalar (alpha.water) equal to 0.5 in order to visualize only water; the results are shown in the figure below. Is normal to have this kind of "rough" - unnaturally regular - pattern on the water surface? How can I avoid it? Thanks... Miguel Schermata 2022-01-09 alle 18.52.24.jpg

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January 19, 2022, 09:35		#2
Miguel Hernandez Member Miguel Hernandez Join Date: Feb 2021 Location: En mi casa Posts: 56 Rep Power: 5	Can this be related to some paraview's graphical issues?

January 21, 2022, 01:41		#3
AtoHM Senior Member M Join Date: Dec 2017 Posts: 642 Rep Power: 12	Would you show your mesh resolution/type? Using point data in Paraview can smooth out a bit, don't know what you are using here.