3d blade mesh problems
I am trying to create a 3d grid of a blade with flat tips. I have been making 2d grids so I am not new with the blocking strategy but in 3d things get rather complicated. I end up with low quality mesh.I am sure that I am doing something in my blocking stategy.
I have links of the steps I make my meshing procedure so it's easier to point out what is wrong.
Thanks in advance.
1.The farfield and theblade(http://220.127.116.11/3dgrid/1.png)
2.Created the 3D Bounding box associated the edges and made an O-grid split
using the faces at the outflow and those "pointing" in the flat tips of the blade.(http://18.104.22.168/3dgrid/2.png)
3.I split in the "X" and "Z" direction to embrace the blade with a block
4. I delete the block embracing the blade an make edge association to match the blade boundaries
5.The problems start here,because i have to collapse the "trailing edge" blocks.
6.The resulting block structure has this strange triangle-shaped block which produces very strange elements.(in the picture I have removed a layer of blocks)
I am sure that my blocking strategy is the problem.I would appreciate any ideas or thoughts.
Do not delete the block embracing the blade. Create c grid around the blade and extend it in both Z direction till the boundary. Then you collapse the tte wake blocks as you did and also the block inside the blade.
Thanks for your reply.I am not sure I understand what you say. Whether or not I delete the block embracing the airfoil doesn't make any practical difference.After I collapse the trailing edge block these "wedge" shaped boxes appear(from the flat tip to the farfield,I can't collapse those because i will lose the flat tip boundary).
Take a look at the resulting blocks after collapsing the blocks of the trailing edge.
Thanks again for your time
i am sorry it was my mistake in understanding the issue.
You can do one thing you can create Y-grid for the degenerated wedge shape blocks, this might improve the quality.
Yeah,you are right Y-grid conversion makes the quality better.
Thanks a lot
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