June 24, 2019 at 8:07 ambtingthewindSubscriber
HI, recently I am generating a mesh for a louvered fin geometry with ANSYS MESHING, the thickness of the fin is 0.1mm, and there is a boundary layer of ten layers on the fin surface? However, when i finished the meshing, i found the minimum orthgonal quality was as low as 0.02, obviously it cannot be processed in FLUENT. And various trials have been done by me to improve the quality, but they all did not work. So, can someone do me some suggestions to improve it?
June 24, 2019 at 9:03 amRobAnsys Employee
The starting point for this is to understand where and why you have poor quality cells: otherwise I could just reel off a long list of things that will work but not necessarily be causing you a problem.
Use the quality graph and pick the lowest 2-3 columns to highlight the poor cells. Identify why they're bad, and then see what can be done to change this. Post a few screen shots too.
June 24, 2019 at 9:16 am
June 24, 2019 at 10:42 amRobAnsys Employee
It's hard to tell from the images: do you have a thin face at the end of the louvres? What is it for?
June 24, 2019 at 12:45 pm
June 24, 2019 at 3:07 pmRobAnsys Employee
Depending on the application you may be able to use a thin wall in Fluent: we don't need to model metal thicknesses in most applications. This avoids the small face at the end of the unit.
June 24, 2019 at 11:56 pmbtingthewindSubscriber
To use thin wall in fluent is a good solution in some specific situations, but my work now has to consider the thickness of the fin, so thin wall is not applicable.
June 25, 2019 at 11:02 amRobAnsys Employee
If it's for thermal properties read up on shell conduction. Otherwise you'll need to resolve the plate thickness which will increase the cell count.
June 25, 2019 at 11:31 am
June 26, 2019 at 3:25 pmRobAnsys Employee
The problem is caused by the transition from the inflation layer to the first cell. Mesh without the inflation and compare the effects.
July 2, 2019 at 2:08 ambtingthewindSubscriber
I've tried what you suggested, the mesh without inflation layer can reach a minmun aspect ration above 0.15, but I am going to use KW SST in fluent, so there must exist inflation layers.
What can I do next?
July 3, 2019 at 8:35 amRobAnsys Employee
Then you need to do something to avoid the inflation terminating and giving poor pyramid caps. When you say you need to consider the plate thickness why is that?
September 25, 2019 at 3:42 amrajkumar444Subscriber
Do meshing in ansys fluent. Polymesh will work for one fin mesh.
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