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Forum: ANSYS Meshing & Geometry

September 3, 2012, 07:13

Replies: 8

[ICEM] Problem with Prisms

Views: 2,107

Posted By stuart23

@Andris, when you inflate your prisms, you can...

@Andris, when you inflate your prisms, you can specify them however you want (first layer height / total height / growth rate etc etc), then once you want to smooth, freeze the prisms so they are not...

Forum: ANSYS Meshing & Geometry

September 3, 2012, 07:10

Replies: 8

[ICEM] Problem with Prisms

Views: 2,107

Posted By stuart23

@siw: i tend to agree. It depends on the Re...

@siw: i tend to agree.

It depends on the Re of the simulation to the size of the boundary layer, however I think that the last layer of prisms are too big, and it would have been better to switch...

Forum: ANSYS Meshing & Geometry

September 3, 2012, 06:30

Replies: 8

[ICEM] Problem with Prisms

Views: 2,107

Posted By stuart23

Andris, near the surface, the velocity gradient...

Andris, near the surface, the velocity gradient is in one direction only, normal to the wall, so this is the only direction that you need lots of resolution. Therefore having high aspect ratio prisms...

Forum: ANSYS Meshing & Geometry

September 2, 2012, 11:59

Replies: 8

[ICEM] Problem with Prisms

Views: 2,107

Posted By stuart23

Andris, For all CFD purposes, it is most...

Andris,

For all CFD purposes, it is most efficient to have very high aspect ratio prisms. If you think about the velocity gradients, the biggest one is in the direction normal to the wall,...

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