Hi,
I am new and still not familiar using CFD Autodesk. I have question, can anyone help me how to create thickness layer or extrude mesh like the picture below?
Thank you for your attention.
Solved! Go to Solution.
Solved by matt.bemis. Go to Solution.
Solved by Jon.Wilde. Go to Solution.
This looks fairly standard to me. They might have just added a few layers, so something like this (Wall Layers within the meshing) should give you a few additional layers.
The wall layers are prismatic like default.
Hi Jon, thank you for your reply. I was try many time to set like that. Actually I want to create a geometry of wing with rectangle boundary then generate refine mesh near wing but coarse near the wall of boundary. Please see the picture.
The wing located centre of that geometry. I separate the boundary.
I want to set growth mesh of edge near the wing but I can not.
Thank you for your sharing.
It might be easier to just add a mesh refinement region around the wing. Or a few of them, this should give you a nice mesh transition 🙂
Thank you for your reply. I was tried as your advice. But I can not to solve it. I set the boundary condition like this picture.
- inlet as velocity
- outlet as pressure
- side view as slip/symmetry
- other side view as periodic (because I just create half of geometry)
- top and bottom side I want to set as wall but there is no option for wall so I am not set that and also the wing
then I want to solve this geometry, suddenly appear the warning like this.
Could you give me some advices? Thank you for your help.
Hi @Miyuki.Azukira,
The solver is exiting because the periodic boundary condition is set incorrectly. Check out this article on using periodic boundary conditions. I think in this case it would make sense to just use a slip/symmetry BC instead of periodic.
Please let me know what you think!
Thanks,
Hi @matt.bemis, thank you for your reply.
Actually I want to simulate this geometry, I think it is symmetry.
But to reduce computational I create half of that like the picture previously.
So it is better to set the BC from periodic to symmetry? what about BC of the bottom and top? I want to set as wall, but there is no option for wall. Does no need to be initialized?
Let me know if I am wrong. Thank you for your attention.
Hi @Miyuki.Azukira,
You definitely want to use the symmetry boundary condition, not periodic. The slip/symmetry BC allows the flow at the wall to be the same as the free stream velocity (upstream flow, here it'd be your inlet BC). By assigning the slip/symmetry BC there will be no boundary layer near the wall.
If you do indeed want to model a physical wall, then no boundary condition will be necessary. The flow will have a 0 velocity at the wall and a boundary layer will develop.
I hope this helps!
Thanks,