NASA's grids not working on SU2

gittagawa · August 4, 2017, 08:22

Hello all,

I am new in CFD and I am running some simulations on a NACA 0012. I have used the configuration file from:

https://github.com/su2code/SU2/blob/...CA0012_sst.cfg

and the grid from:

https://github.com/su2code/TestCases.../rans/naca0012

The results are very close to NASA test cases'. However, when I try to use NASA's grids (from the link below), it does not work.

https://turbmodels.larc.nasa.gov/naca0012_grids.html

I changed the configuration file to use .CGNS:

%
% Mesh input file
MESH_FILENAME= n0012_113-33_hex.cgns
%
% Mesh input file format (SU2, CGNS, NETCDF_ASCII)
MESH_FORMAT= CGNS
%

Is there any difference between the grids provide by SU2 and by NASA? What else should I change?

I need to run some simulation in a different airfoil (NACA 4412). I can find the grid in NASA website but I end up with the same problem.

Can anyone help me, please?

Thank you very much!

AlbertoPi · August 7, 2017, 03:20

Hi,
Maybe the grid is not appropriate. The markers of the boundaries and the thickness of the grid in the spanwise-direction can be wrong to SU2.
Do you have some error message?
The mesh of the TestCases folder is equivalent or you can try to use your own mesh.

Regards,
Alberto.

gittagawa · August 9, 2017, 18:17

I changed the markers and it worked. Thanks a lot Alberto!

fpalacios · August 11, 2017, 08:46

Hi,

Thanks a lot for using SU2,

The problem with the CGNS format in the NASA webpage is that we are using a 3D grid for a 2D problem (not really very efficient). If you are going to use NASA grid... they are really good, my recommendation is to translate the plot3D to su2 format using the scripts that you can find in

https://github.com/su2code/MeshTools

inside the folder Python/

Best Regards,
Francisco

gittagawa · August 12, 2017, 19:41

I am using grids from NASA because I had to simulate the NACA 4412 airfoil. I think there is no grid available at SU2 repository, right? I found for the NACA 0012 only.

I will use script to convert it.

Thank your very much Francisco!

August 4, 2017, 08:22	NASA's grids not working on SU2	#1
gittagawa New Member gittagawa Join Date: Jun 2017 Posts: 24 Rep Power: 9	Hello all, I am new in CFD and I am running some simulations on a NACA 0012. I have used the configuration file from: https://github.com/su2code/SU2/blob/...CA0012_sst.cfg and the grid from: https://github.com/su2code/TestCases.../rans/naca0012 The results are very close to NASA test cases'. However, when I try to use NASA's grids (from the link below), it does not work. https://turbmodels.larc.nasa.gov/naca0012_grids.html I changed the configuration file to use .CGNS: % % Mesh input file MESH_FILENAME= n0012_113-33_hex.cgns % % Mesh input file format (SU2, CGNS, NETCDF_ASCII) MESH_FORMAT= CGNS % Is there any difference between the grids provide by SU2 and by NASA? What else should I change? I need to run some simulation in a different airfoil (NACA 4412). I can find the grid in NASA website but I end up with the same problem. Can anyone help me, please? Thank you very much!

August 9, 2017, 18:17	Problem solved	#3
gittagawa New Member gittagawa Join Date: Jun 2017 Posts: 24 Rep Power: 9	I changed the markers and it worked. Thanks a lot Alberto! AlbertoPi likes this.

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August 7, 2017, 03:20		#2
AlbertoPi New Member Alberto Pizarro Join Date: Feb 2016 Posts: 18 Rep Power: 10	Hi, Maybe the grid is not appropriate. The markers of the boundaries and the thickness of the grid in the spanwise-direction can be wrong to SU2. Do you have some error message? The mesh of the TestCases folder is equivalent or you can try to use your own mesh. Regards, Alberto.

August 11, 2017, 08:46		#4
fpalacios Super Moderator Francisco Palacios Join Date: Jan 2013 Location: Long Beach, CA Posts: 404 Rep Power: 15	Hi, Thanks a lot for using SU2, The problem with the CGNS format in the NASA webpage is that we are using a 3D grid for a 2D problem (not really very efficient). If you are going to use NASA grid... they are really good, my recommendation is to translate the plot3D to su2 format using the scripts that you can find in https://github.com/su2code/MeshTools inside the folder Python/ Best Regards, Francisco

August 12, 2017, 19:41		#5
gittagawa New Member gittagawa Join Date: Jun 2017 Posts: 24 Rep Power: 9	I am using grids from NASA because I had to simulate the NACA 4412 airfoil. I think there is no grid available at SU2 repository, right? I found for the NACA 0012 only. I will use script to convert it. Thank your very much Francisco!