Thin gap

March 29, 2006, 08:13

Hi, I am modeling a pipe flow containing a restrictor. A thin gap with about 0.1 mm hight occurs. My question is what should be the minimum amount of elements in this gap regarding hight) for good results with sst?

greets

March 29, 2006, 19:25

Hi,

There is no general answer to that question as it depends on the flow, geometry and lots of other things. Do a mesh refinement study on it and find out.

Glenn Horrocks

March 30, 2006, 08:13

Ey thx I am trying. Leads me to the next problem. Refining the mesh leads the mesh to creep out of the body at narrow overlapping surfaces. Possible to avoid that?

March 30, 2006, 18:40

Hi,

In ICEM have a look at thin cuts (I think that is what they are called). CFX-Mesh should not have this problem.

Glenn Horrocks

March 29, 2006, 08:13	Thin gap	#1
Flu Guest Posts: n/a	Hi, I am modeling a pipe flow containing a restrictor. A thin gap with about 0.1 mm hight occurs. My question is what should be the minimum amount of elements in this gap regarding hight) for good results with sst? greets

March 29, 2006, 19:25	Re: Thin gap	#2
Glenn Horrocks Guest Posts: n/a	Hi, There is no general answer to that question as it depends on the flow, geometry and lots of other things. Do a mesh refinement study on it and find out. Glenn Horrocks

March 30, 2006, 08:13	Re: Thin gap	#3
Flu Guest Posts: n/a	Ey thx I am trying. Leads me to the next problem. Refining the mesh leads the mesh to creep out of the body at narrow overlapping surfaces. Possible to avoid that?

March 30, 2006, 18:40	Re: Thin gap	#4
Glenn Horrocks Guest Posts: n/a	Hi, In ICEM have a look at thin cuts (I think that is what they are called). CFX-Mesh should not have this problem. Glenn Horrocks

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