Skewness correction
 

Hi,

I am simulating a turbine in Fluent that it has curve. Mesh is structure completely. but there is high Skewness in tip clearance and some parts of around of the blade.

http://www.upload7.ir/imgs/2014-10/9...2347311853.jpg


when i use SIMPLEC Method, one factor (Skewness correction) appear under the SIMPLEC method in ANSYS Fluents method.
How i must adjust this factor? i dont know which number must be set?1< or 1 , 2, 3,

I used K-e turbulence model and when I set Skewness correction to 5 or 20, the following error appears:

Error: Divergence detected in AMG solver: k

Error: Divergence detected in AMG solver: k
Error Object: #f

Why does this happen?


Please suggest a way to reduce the skewness in ansys fluent. And how can i check Skewness in Fluent?



Thanks.


Best.


Aja

Hi

I have now the same problem as you and I usually check the skewness in the Mesh Module of my Workbench...

Is the only possibility to work on a new mesh to reduce skewness?

Thanks

I had a similar error with the k-omega model. I could fix it with reducing the skewness by converting the mesh into a poly mesh.

You can check the the skewness in fluent with: Adapt -> Iso-value -> Iso Values of: Mesh and than you have the Cell Equiangle skew and the Cell Equivolume skew.
You can see here your max and min Value. Also you can set the iso min and iso max and mark all cells in in that range. Fluent tells you than how many cells were marked.
For a more in depth view of the skewness you need to look in the mesher.