[alex::cfd]

Hi all,

I use the coarse blockmesh and refine at stl surface approach explained in the userguide section 4.4. to place a wing section into a domain.

In principle, meshing works.
However, although the pointed trailing edge gets meshed fine, the round leading edge is awkward.

Here is the leading edge in the CAD program (actually blender):


The result looks like:



I found that increasing refinement levels from 4 to 7 increases quality:


This however is still unsatisfactory.

The geometry of the stl used as input looks well, wehn viewd in paraFoam.
Can I visualize the result of surfaceFeatureExtract somehow to see if the result is Ok?

One difference compared to the trailing edge is that the leading edge is resolved by much more points in the stl. Could this be a problem?

How can I achieve a more round shape at the tip? Any hints?

Thx
Alex

[fra76]

Hi, Alex,

To me, it looks like you have to refine your mesh where the curvature is higher.
Try to give a max refinement level higher than the min one and, if needed, play with the resolveFeatureAngle parameter.

Hope this helps,
Francesco

[alex::cfd]

Hi,
yes, I tried that (actually spend the whole day trying to optimize parameters).
The route to success was recognizing that mesh quality control might render settings ineffective.
-> 1st disable all mesh quality contol. then get the parameters correct and then bit by bit turn on the quality control again.