SimScale CAE Forum

GNVR Profile

Hi, I am currently working on a project which includes the use of a GNVR profile. I have to compare my CFD values with the research papers that I have. But while simulating I am getting Illogical values for drag and lift. https://www.simscale.com/workbench/?pid=6718823594792528532&mi=spec%3A7afd25fc-f028-479b-881f-6542128cd47a%2Cservice%3ASIMULATION%2Cstrategy%3A26

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Hi Pranshul, thank you for using the forum!

I noticed that you set the body’s walls as Slip walls, can you give it a try with them set as No-slip walls instead? Have a look at this tutorial for example: https://www.simscale.com/docs/tutorials/compressible-cfd-simulation-golf-ball/

Best regards,
Fillia

I have tried this the trend seems to be same

Hi , Is there a problem with the solver settings in K epsilon? https://www.simscale.com/workbench/?pid=6331400452565150456&mi=spec%3Ab543a867-5588-4427-a1f0-d64937a5da95%2Cservice%3ASIMULATION%2Cstrategy%3A16. Because I tried with a finer mesh settings also but the result/trend appears to be the same.

Hi Pranshul, please have a look at my latest run (Run 4) here: https://www.simscale.com/workbench/?pid=6321651855388874813&rru=82c8090a-7a05-4098-8127-d2576a379173&ci=0016490b-c4ca-46c2-a913-6bab191d8636&ct=PLOT&mt=SIMULATION_RESULT
Are these results close to what you are expecting?

Yes they are far better now . What was the problem with my simulation method?

I activated the ‚ÄėPotential foam initialization‚Äô in the Simulation Control tab. By the way, you can use a much finer mesh for your simulation, like the one in the project I sent you, and save some core hours :smiley:

Can you tell me in detail about this potential foam function?

Have a look here under the Potential Flow Initialization section: https://www.simscale.com/docs/simulation-setup/simulation-control-fluid/