# Prism layer problem

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 February 19, 2018, 06:39 Prism layer problem #1 New Member   Çağrı Join Date: Feb 2015 Posts: 11 Rep Power: 11 Hello, Trying to mesh a boat but the prism layers are retracting on the head of the boat where they have no reason to. Increasing the layer reduction percentage somewhat solves it but this is the best i got so far with 85 percent which is the limit. What might be the problem here?

 February 19, 2018, 08:26 #2 New Member   Join Date: Jan 2018 Posts: 5 Rep Power: 8 Use surface remesher before trimmer

February 19, 2018, 12:16
#3
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Quote:
 Originally Posted by slesar85 Use surface remesher before trimmer
it's already activated in mesher models. do you suggest doing that seperately?

 February 20, 2018, 03:42 #4 New Member   Join Date: Jan 2018 Posts: 5 Rep Power: 8 No, of course, there is no difference. Just some people make a mesh without remesher. Try then remesher+Advancing layer mesher. But the mesh will be built long.

February 20, 2018, 05:21
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Quote:
 Originally Posted by slesar85 No, of course, there is no difference. Just some people make a mesh without remesher. Try then remesher+Advancing layer mesher. But the mesh will be built long.
Thats one of the first things i've tried. Although it did resolve the issue, the cell count went up by a lot since i need to refine the free-surface and polyhedral cannot be refined anisotropically. Guess i have to do something else. Thanks for the answers.

Cheers,

 February 20, 2018, 22:05 #6 Senior Member   Join Date: Nov 2010 Location: USA Posts: 1,232 Rep Power: 24 Building a mesh over what looks like a sharp curve is a great challenge. Is that a symmetry plane? You may have an easier time generating the layers if you just put prisms over the symmetry plane as well. Projecting prisms to a symmetry plane at such an obtuse angle will nearly always give you these skewed cells.

February 21, 2018, 04:45
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Quote:
 Originally Posted by me3840 Building a mesh over what looks like a sharp curve is a great challenge. Is that a symmetry plane? You may have an easier time generating the layers if you just put prisms over the symmetry plane as well. Projecting prisms to a symmetry plane at such an obtuse angle will nearly always give you these skewed cells.
yes, it's a symmetry plane. Thanks for the advice, i will try it out.

 March 3, 2018, 03:36 #8 New Member   Tarık Parlayan Join Date: Sep 2017 Location: Istanbul / Turkey Posts: 1 Rep Power: 0 You must define symmetry region as symmetry plane before generate mesh.

June 7, 2020, 16:15
#9
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Quote:
 Originally Posted by me3840 Building a mesh over what looks like a sharp curve is a great challenge. Is that a symmetry plane? You may have an easier time generating the layers if you just put prisms over the symmetry plane as well. Projecting prisms to a symmetry plane at such an obtuse angle will nearly always give you these skewed cells.
I agree to what you said above. But the prism layers are automatically generated on wall type boundaries. Why they move to symmetry plane?

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