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Forum: CFX

March 4, 2013, 16:49

Replies: 8

Grid refinement ratio for unstructured mesh

Views: 3,800

Posted By ghorrocks

Oh - Roache gives guidelines on this as well. ...

Oh - Roache gives guidelines on this as well.

But I generally double or halve the length dimension of the element. So a single hex element would become 8 for a 3D model, then 64. Often you are...

Forum: CFX

March 4, 2013, 04:36

Replies: 8

Grid refinement ratio for unstructured mesh

Views: 3,800

Posted By ghorrocks

I did not make myself clear enough in my previous...

I did not make myself clear enough in my previous post. I was commenting on your quote "The only problem in this approach is there seems to be no agreed quantification of word "significant".

For...

Forum: CFX

March 3, 2013, 05:11

Replies: 8

Grid refinement ratio for unstructured mesh

Views: 3,800

Posted By ghorrocks

The definition of significant is what you define...

The definition of significant is what you define as significant. If you are doing initial design calcs then 20% error might be fine - you just want a general ida of what is going on. But for final...

Forum: CFX

February 28, 2013, 16:47

Replies: 8

Grid refinement ratio for unstructured mesh

Views: 3,800

Posted By ghorrocks

You would have to read the paper for the...

You would have to read the paper for the definition of D. But I suspect it will be 2 for 2D models and 3 for 3D models.

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