[Sudipta Ray]

Hi everyone,
I am solving a problem of boundary-layer flow in fluent 13. To apply a particular turbulence model, I need to have a specific range of Y+ value at the wall. But the grid I'm creating in Gambit is not sufficient for it. Thus I'm trying to adapt the mesh via the y+ adaption scheme of Ansys Fluent itself. Is this particularly helpful? Fluent has created some hanging node mesh near the wall. I'm attaching the plot of wall y+ below. Please suggest if this technique is useful or not.

[LDA]

Yes it is useful. But the mesh element size will increase considerably if you have a poor mesh initially.

Try to use a higher quality mesh generator such as Pointwise. With their special technique it is far effective to modify a BL mesh compared to those in Gambit.

Good luck

[LDA]

By the way, instead of checking y star check y+

[Sudipta Ray]

thanks LDA, i've meant to upload the y+ plot but somehow accidentally the y* one was uploaded. Also, about the initial mesh quality, I can say the mesh was structured with maximum aspect ratio 11.1 and minimum orthogonal quality 0.585. Is it not good enough, since I've read allowable orthogonal quality 0.5-1 and aspect ratio < 50. What can be said about this?