discontinuity in Prisim layers at solid liquid interface

Bal21 · September 2, 2022, 03:37

Hi All,

as you can see in the attached picture there seems to be a discontinuity in the prism layer at the solid/liquid interface? what are proper causes for this?MicrosoftTeams-image (1).png

LuckyTran · September 9, 2022, 13:52

That's the prism layer retraction kicking in. Is there an adjacent surface where prism layers have been disabled or a large deflection in the two boundary normal vectors? Are the prism layer settings the same on all surfaces or are they different and forcing one layer to retract to match another layer?

CFDfan · September 13, 2022, 12:56

Quote:

Originally Posted by Bal21

Hi All,

as you can see in the attached picture there seems to be a discontinuity in the prism layer at the solid/liquid interface? what are proper causes for this?Attachment 91437

It is not quite clear from the picture, but it looks like the prizm layers were fine there, just their thickness got lower

ashokac7 · September 14, 2022, 08:18

Yes. There is no discontinuity there. Layers compresses near a corner. One way to get rid of this is by increasing surface size. But I would suggest to not bother. There is no problem with this type of mesh.

September 2, 2022, 03:37	discontinuity in Prisim layers at solid liquid interface	#1
Bal21 Member Bal Join Date: Nov 2021 Posts: 49 Rep Power: 4	Hi All, as you can see in the attached picture there seems to be a discontinuity in the prism layer at the solid/liquid interface? what are proper causes for this?MicrosoftTeams-image (1).png

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September 9, 2022, 13:52		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,668 Rep Power: 65	That's the prism layer retraction kicking in. Is there an adjacent surface where prism layers have been disabled or a large deflection in the two boundary normal vectors? Are the prism layer settings the same on all surfaces or are they different and forcing one layer to retract to match another layer?

September 14, 2022, 08:18		#4
ashokac7 Senior Member Ashok Chaudhari Join Date: Aug 2016 Location: Pune, India Posts: 260 Rep Power: 10	Yes. There is no discontinuity there. Layers compresses near a corner. One way to get rid of this is by increasing surface size. But I would suggest to not bother. There is no problem with this type of mesh.