Wing Meshing Issues

Kendricklamar · March 26, 2021, 07:23

Hey guys. I am modelling a tapered and swept 3D wing and I am having trouble with the meshing. In one of the pictures attached is a cross section of the mesh, and it seems like the prism layer is mixing with the poleyhedral mesh. Is this affecting my results? The solution also does not converge using the segregated solver, only with the coupled. y+ values are less than 2 so I assume the mesh is fine enough? Any help would be appreciated.

Screenshot 2021-03-26 141647.png

Screenshot 2021-03-26 141751.jpg

fluid23 · March 31, 2021, 09:57

That may just be an artifact of the cut plane. Try moving it to other locations and see if you still see it.

That being said, your trailing edge mesh needs some attention and your growth rate from prism to core mesh is very aggressive. You will definitely need to consider wake refinement if you want quality results.

Peresvet · April 1, 2021, 10:19

[QUOTE=Kendricklamar;799918]Hey guys. I am modelling a tapered and swept 3D wing and I am having trouble with the meshing. In one of the pictures attached is a cross section of the mesh, and it seems like the prism layer is mixing with the poleyhedral mesh. Is this affecting my results? The solution also does not converge using the segregated solver, only with the coupled. y+ values are less than 2 so I assume the mesh is fine enough? Any help would be appreciated.

Wrong grid. You are interested in frontal resistance or all forces at the same time? I think you should be interested in all forces. Then the grid will be completely different.

If you want important turbulence models to work, you need to make the meshes much denser. Millions.

The main purpose of the number of prismatic layers is the fitting of the data to the experimental data and their further use in other calculations. This requires experience. Your prism mesh is initially very thick.

A significant number of users who have reached the top have their own theory of using grids. This is due to the individual experience of achieving a result.
Program developers have much lower levels of this knowledge.

DrDerpy13 · June 12, 2021, 13:18

I don't understand why the poly and the layers are overlapping. What settings have you used for mesh?

March 26, 2021, 07:23	Wing Meshing Issues	#1
Kendricklamar New Member Abdulrahman Join Date: Nov 2020 Posts: 3 Rep Power: 5	Hey guys. I am modelling a tapered and swept 3D wing and I am having trouble with the meshing. In one of the pictures attached is a cross section of the mesh, and it seems like the prism layer is mixing with the poleyhedral mesh. Is this affecting my results? The solution also does not converge using the segregated solver, only with the coupled. y+ values are less than 2 so I assume the mesh is fine enough? Any help would be appreciated. Screenshot 2021-03-26 141647.png Screenshot 2021-03-26 141751.jpg

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March 31, 2021, 09:57		#2
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 18	That may just be an artifact of the cut plane. Try moving it to other locations and see if you still see it. That being said, your trailing edge mesh needs some attention and your growth rate from prism to core mesh is very aggressive. You will definitely need to consider wake refinement if you want quality results.

April 1, 2021, 10:19		#3
Peresvet Member Peresvet Join Date: Mar 2021 Location: USSR Posts: 56 Rep Power: 5	[QUOTE=Kendricklamar;799918]Hey guys. I am modelling a tapered and swept 3D wing and I am having trouble with the meshing. In one of the pictures attached is a cross section of the mesh, and it seems like the prism layer is mixing with the poleyhedral mesh. Is this affecting my results? The solution also does not converge using the segregated solver, only with the coupled. y+ values are less than 2 so I assume the mesh is fine enough? Any help would be appreciated. Wrong grid. You are interested in frontal resistance or all forces at the same time? I think you should be interested in all forces. Then the grid will be completely different. If you want important turbulence models to work, you need to make the meshes much denser. Millions. The main purpose of the number of prismatic layers is the fitting of the data to the experimental data and their further use in other calculations. This requires experience. Your prism mesh is initially very thick. A significant number of users who have reached the top have their own theory of using grids. This is due to the individual experience of achieving a result. Program developers have much lower levels of this knowledge.

June 12, 2021, 13:18		#4
DrDerpy13 New Member Vlad Join Date: Oct 2020 Posts: 13 Rep Power: 6	I don't understand why the poly and the layers are overlapping. What settings have you used for mesh?