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Forum: Main CFD Forum

June 14, 2017, 15:02

Replies: 18

Large eddy simulation

Views: 1,997

Posted By piu58

A big domain ist not a big problem if you don't...

A big domain ist not a big problem if you don't need to resolve small details. That means, if there is only a slow velocity. Regions with high velocity need to mesh finer.

Forum: Main CFD Forum

June 14, 2017, 14:44

Replies: 18

Large eddy simulation

Views: 1,997

Posted By piu58

If you double the node density and get a...

If you double the node density and get a difference of the main results of let's say 10%, than you have to assume that a even finer mesh would get another 10% and a very very fine mesh again some...

Forum: Main CFD Forum

June 14, 2017, 13:18

Replies: 18

Large eddy simulation

Views: 1,997

Posted By piu58

> For example two meshes with the same mesh...

> For example two meshes with the same mesh metrics but difference in number of elements, which one is the best ?

All in all you should avoid skew elements , very different element sizes and large...

Forum: Main CFD Forum

June 14, 2017, 11:29

Replies: 18

Large eddy simulation

Views: 1,997

Posted By piu58

> is very sensitive to the grid quality and there...

> is very sensitive to the grid quality and there is no independence o

There is a huge difference between grid quality and spatial differentiation.

LES may be sensitive to the quality, but...

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