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Wrong results for lift force every simulation |
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June 16, 2019, 13:37 |
Wrong results for lift force every simulation
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#1 |
New Member
Henrique Carneiro
Join Date: Jan 2019
Posts: 4
Rep Power: 7 |
Hello guys.
I am simulating a steady-state water flow past a bare hull underwater vehicle in ANSYS Fluent for validating purposes based on an article. The problem is that for every velocity and angle of attack the drag coefficient is correct but the lift coefficient is off by up to 50%. I have performed mesh dependency tests, tried several turbulence models, increased/decreased inflation layer size and y+, but still failing to understand the cause. I've also turned up the gravity effect but I got no difference in the results whatsoever. Could this be because the weight is being balanced by the buoyant force? Or it is not balanced and there is no weight because the geometry is defined as hollow (I only have surfaces defining the hull body because I have used a subtract boolean feature). Any help is appreciated. Thank you in advance! |
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March 19, 2021, 16:23 |
Same problem
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#2 |
New Member
Jaydev Dave
Join Date: Mar 2021
Posts: 2
Rep Power: 0 |
I am simulating a fuselage, and had used every combination of models possible. But still drag is expected and correct as well while lift is totally wrong.
Hey did you get any solution? |
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March 21, 2021, 09:58 |
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#3 |
New Member
moh
Join Date: Jan 2014
Posts: 20
Rep Power: 12 |
tray to check the reference value or use UDF such as " excute at end" to calculate lift
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Tags |
coefficient, drag, fluent, lift, water |
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