Hypermesh boundary layer mesh repair

Altair Forum User

Please tell me, How can I repair the boundary layer mesh with the following quality criteria.

1.Aspect ratio <5

2.skew <60

3.tet collapse <1

Q.Nguyen-Dai

Boundary layer mesh is often created from HEX/PENTA element.

• This special type of elemenent used for CFD has very small thickness. So don't check 'aspect ratio' !
• No TET elements, so no 'tet collapse' checking

Altair Forum User

I have registered for the Altair optimization contest.In that, they gave guidelines on meshing.I attached the image of meshing guidelines please take a look.

 

<?xml version="1.0" encoding="UTF-8"?>

Q.Nguyen-Dai

Hmm, do you prepare mesh for CFD?

I do often CFD mesh with aspect ratio ~ 10-15 for boundary layers.

Altair Forum User

I prepared the CFD mesh and checked the quality.When I checked the 3d mesh quality it shows the total boundary layer 3d elements as failed elements.Is it possible to do the mesh with the above-given procedure?

Q.Nguyen-Dai

Believe me, I make CFD mesh with boundary layer having aspect ratio ~10-15 and my CFD team got always good results :-)

Attention: If you respect ratio < 5, your mesh maybe becomes too big to solve! 

 

So in numerical world, as in the real life, we have to found good compromise /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20' />

Altair Forum User

Thank you so much for your reply.

Altair Forum User

Could you please explain the procedure which was mentioned below.I don't know how can I create a volume mesh in Hypermesh for CFD.

<?xml version="1.0" encoding="UTF-8"?>

Q.Nguyen-Dai

Altair Forum User said:

Could you please explain the procedure which was mentioned below.I don't know how can I create a volume mesh in Hypermesh for CFD.

 

 

Have a look at CFD Meshing tutorials?