the problem of 3D boundary layer
 

Hello friends！
Fluid is in this geomery Attachment 42088 ,so I want to mesh the boudary layer ,the boudary layer is in this pictureAttachment 42089.In the corner of the geomery the boudary is in this picture Attachment 42090 .My problem is that length of mesh 1 is diffent from the mesh of 2 so the quality of the volume mesh in the corner is poor ,how can I do to make the mesh have the same length ?Thank you very much !
your sincerely hotboy!

control the mesh on the edges
https://www.sharcnet.ca/Software/Gam...mesh_edge_mesh

Dear mAx!
Thank you very much ,I'll try to do it as you tell me .

Dear mAx!
I control the mesh on the edges ,but the result is this Attachment 42109 what's the problem?

you need to mesh your surfaces first

Dear mAx!
Thank you very much for your help .I mesh the surfaces first but the problem is still exist Attachment 42112. My geomery is there https://drive.google.com/folderview?...Gc&usp=sharing

no problem from my side
Attachment 42114
I just picked both edges and applied exponent node distribution
Else you can define a size function with edge.7 as source and your volume as attachment.
Gambit will automatically refine the mesh in this area

Dear mAx!
With your help I fix this problem .Thank you very much!
Best wishes for you!