[alven299]

Hi all,

I have a problem in getting a good mesh quality for my geometry. I am dealing with a half section of a distillation column (DC) tray. The tray as shown in "Base geo" has vast number of sieve holes. I separated the volume into two section (as indicated by the different colors) for the ease of sizing along the vertical axis. I managed to mesh the geometry, however, with poor quality especially in the core region. The meshes look alright at first but as it departs further from the base, instead of structured hexahedral meshes, the core region is dominated by unstructured tetrahedral meshes. I have attached several pics.

Following are my global sizing specs:

Advanced Size Function = Fixed
Relevance centre = fine
Smoothing = high
Transition = slow
Max face size = 0.012 mm
Max tet size = 0.012 mm
Growth rate = 1

I first suspected the max face size and max tet size as the problems but altering these also resulted in the same observations.

Does anyone know how what might be the cause to this problem and perhaps how to rectify this problem?

Any inputs are very much appreciated.

alven299.