[jjz2013]

I have a question confusing me for a while. Can ICEM merge hexa and prism meshes at an interface. For example, the mesh on the left side is triangular prism and on the right side is the hexahedral mesh. I always get some fail message when I try to merge these two type of meshes at an interface. Does anyone have the experience for it? Thanks!

[Far]

No not possible. However you can create non-conformal interface in CFX/Fluent.

[jjz2013]

Thank you, Far. I also think about this solution. I am just worried about the convergence problem since at one side the domain will be defined as porous media.
Btw, do you know how to hexahedral meshes without using blocking function. Like in gambit, I can firstly create hexa meshes in the porous media domain, and then create tetra meshes. The interface can automatically create formal meshes. Do you have any idea?

[Far]

Procedure in ICEM is different than any bottom-up approach whether it is Gambit or gridgen.

The solution is to mesh one domain with tetra and other with Hexa and merge them. It is to be noted pyramids will be there at interface.

[jjz2013]

Thank you for your reply. You helps me a lot to answer my questions.
If merge meshes is not functional for the mesh pair of prism and anyother, it will become a real problem in practice. Becaues this is the situation that I met quite often in my work. I will have to define interfaces in fluent anyway.

Thanks, far!

[Far]

Why you dont try full hexa ?

[diamondx]

prism+tetra merging with hexa... that's my dream

@FAR, i previously saw a thread where someone claimed he could do it but the quality was very bad... do you remember that thread ? i can't find it ...

[jjz2013]

Thanks for you guys' suggestions. I will try both solutions.

[Far]

@Ali: In fact those were your words which I just wrote here " Prisms cannot be merged with Hexa due to stiffness of prism" Remember

The basic logic is " when we merge Hexa with tetra, it changes tetra mesh on that face and keep the Hexa as it is. While this is not possible with prisms. In other words prisms cannot redistribute themselves to conform with Hexas

[diamondx]

yeah yeah i do remember, here is why i also remember:

That guy said he created the tetra without prism, then the hexa. he after that merged them. Until here everything everything can be done without affecting the quality.

then after the merge he generated the prism. (on the hexa+tetra). it is doable when you think about it, but i don't know about the reality...

[Far]

that is simply not possible due to working style of ICEM.

[FJSJ]

Hi all,
I've read this post to try to deal with a problem. I'm surprised to read Far´s word about merge meshes because I made the "Merged Tetra-Hexa Mesh in a Hybrid Tube" tutorial and in that case is possible. I did it. And, now I´m trying to do exactly the same between this two meshes.

I mean, I´d thought to do in the same project, the first mesh, then save it, then close it, secondly, create the second mesh (picture 2), and then merge them. Exactly, the same procedure as the tutorial. So.. Is it not possible?

Thanks in advance!