[Gimlas]

Dear colleagues,

I have a problem with generating prism and volume mesh in ICEM. I have to prepare a simulation of a small airplane. For the first approach I generated a volume body of air surrounding the examine object and for the second aproach I transformed this volume body into shell body. However, in both cases the resulting problems are the same.

I can generate the surface mesh on all desired faces. The problem starts when I try to prepare an inflation layer. Unfortunatelly, the algorithm generates the cells in wrong direction. Instead of creating a layer within the volume body or at the inner side of the shell body it generates the cells outside of the body. I cannot force the algorithm to do it in another way.

Well, I decided to deal with that problem later and try to generate a tertra mesh to see if everything is ok. But it is not. Once again in both cases (shell and volume bodies) the cells are generated in a veru bizzare way, outside from the body. Below I am attaching some figures in order to better describe the issue. The PART namend Air is the volume or shell body, the rest of of PARTs are named faces of the model.

I would be grateful if you could give me any hint how to solve this issue.

PS: I tried to generate mesh using ANSYS MESHER with default setting, and the mesh was generated correctly, including inflation layer.

[Far]

change the direction of surface.

[diamondx]

any tin file you can share with us. We can help you inspect geometry...

[Gimlas]

Originally Posted by Far

change the direction of surface.

Could you shortly describe how to do it?

I am also attaching the tin file. Thank you for your help.

http://www.filedropper.com/icm

[Gimlas]

Small update.

Far is right - the problem lies with the orientation of the shell elements. I reversed the normals of all shell elements (using Edit mesh->ReOrient Mesh->Reverse Direction; see attached figure). However, when the prism layer is generated the elements normals are once again directed in wrong direction (figure 2). I also tried to use "Fix marching direction" in prism layer settings with no effect.

Concluding, what do I have to change in the prism layer settings in order to obtain valid mesh?

[Far]

arrow should be pointing upwards. Also use option make normal consistent