Structured Meshing for Multi Element Airfoil
Hello,
I am trying to create a structured mesh for a multi element airfoil on ansys meshing. Despite trying for several split patterns on spaceclaim, I am still unable to generate a structured mesh on the entire c-grid domain. Some splits are structured while some remain un-structured. Could anyone help me how I can obtain structured mesh on this C-grid for multi element airfoil? https://us.v-cdn.net/6032193/uploads...TKRF/1-jpg.jpg https://us.v-cdn.net/6032193/uploads...T3BJ/2-jpg.jpg ~ J |
I would forget about that :rolleyes: Hexa mesh ( i suppose that is what you mean by structured) is a pain for anything but the simplest geometry
Did anybody tell you to do that? Why is it so required? |
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Yes, that is exactly what I meant, Hexa Mesh it is. I have spent a total of 15 hours in 3 days trying to get a nice structured mesh (Hexa mesh/mapped mesh) on this c-grid and I am only not able to get it completely. Reached to a fine level of exhaustion now. I have to do Hexa, it is a requirement. Thank you for your response :) |
Hey man,
As I said, hexa mesh with blocking, forget about it, this wont work anytime soon and all you will get is exhaustion as you mentioned. What you can try is hex dominant mesh as meshing method, what it will basically do is create a tetra mesh and then try to automatically convert all the tetras into hexa. If your domain is 2D, the conversion may take place in a feasible amount of time. The advantage is that you can forget about the blocking, which to me is the “forget about it” part. However meshing time will be substantially longer, if I remember well we can even speak about hours. |
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https://www.youtube.com/watch?v=tYrbScUH9RE https://www.youtube.com/watch?v=EknKVAJGEJ8 https://www.youtube.com/watch?v=6wQPeBpvwCk then here for strategies regarding meshing 3-element airfoils: https://www.youtube.com/watch?v=rfMnnzdd3JU and finally here for 3D meshes: https://www.youtube.com/watch?v=NVyvEH-u0wQ I should also comment on Janet's persistence to generate hex meshes by saying that oftentimes, people are not free to choose a meshing strategy because their solver can only be fed a certain type of mesh. Our in-house solver only takes structured multi-block meshes, so there's that. |
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And thank you for the video on 3D meshes, guess that's my next target once I am done with the current 2D one. |
Good to know then, enjoy burning your fingers with ICEM :D
Edit: I will stress my point again: make sure you need a structured mesh and not just an hexa mesh, because if you only need an hexa mesh, I repeat that blocking is a lot of finger burning and, to be honest, sometimes I did not even find it worth. Especially if you want to add small refinement zones (e.g. in the wake of every split), it is also a pain because then you need a lot of elements everywhere to keep a decent cell aspect ratio |
I suggest you visit https://aeroptimal.com/mesh (you must create an account to use this module), where you can create a full structured airfoil mesh - https://youtu.be/4Opu0zk7gFk . You can export .su2 .msh .foam .vtk
https://aeroptimal.com/static/img/Reflex.png |
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