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March 15, 2024, 11:03 |
ahmed body aerodynamics literature review
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#1 |
Senior Member
Join Date: Dec 2019
Location: Cologne, Germany
Posts: 366
Rep Power: 8 |
hi all,
i was trying to simulate the ahmed body case with openfoam recently, and no matter how i changed the mesh (inflation/boundary layer thickness, boundary layer cell count, mesh refinement with boxes ...) i could not reach the drag values reported by Ahmed et al. with kOmegaSST and kOmega2006 turbulence models (did not test any other model). so i did a literature review and searched for publications in which openfoam was used for the ahmed body case. my findings are attached as a screenshot. as one can see, no publication is consistent with the drag value reported in Ahmed et al. so i wonder, if it is worth still trying to tweak the numerics to reach the reported values by Ahmed et al. or if the state-of-the-art is not sufficient. |
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May 31, 2024, 02:23 |
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#2 |
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Tuomo Keskitalo
Join Date: Oct 2010
Posts: 57
Rep Power: 16 |
Hi,
could you please give the full literature references you found please? Thanks! |
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June 13, 2024, 04:25 |
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#3 |
Senior Member
Join Date: Dec 2019
Location: Cologne, Germany
Posts: 366
Rep Power: 8 |
i have attached the full literature review i found. and also the plot showing experimental cd value versus simulation results. as one can see, the results are scattered with deviations up to +50%.
i could match cd value within a couple percent for the ahmed body (25°), drivaer fastback and drivaer estateback with the same numerics, according to fluent user guide, these should be more accurate. i could not match cd with standard numerics. (side note: i used k-omega-sst as turbulence model) |
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June 15, 2024, 00:44 |
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#4 |
Member
Tuomo Keskitalo
Join Date: Oct 2010
Posts: 57
Rep Power: 16 |
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June 15, 2024, 03:20 |
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#5 |
Senior Member
Join Date: Dec 2019
Location: Cologne, Germany
Posts: 366
Rep Power: 8 |
I know. I subscribed to get the tutorial case, because one needs to do that. Unfortunately i did never get the tutorial case. Instead i got tons of emails and ads from that, so i unsubscribed.
Do you have it? If yes, how did you get it? |
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June 16, 2024, 00:59 |
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#6 |
Member
Tuomo Keskitalo
Join Date: Oct 2010
Posts: 57
Rep Power: 16 |
Sorry, no, I don't have it
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