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Simulating a rotating sphere, with axis of rotation normal to flow direction

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Old   December 16, 2014, 14:18
Default Simulating a rotating sphere, with axis of rotation normal to flow direction
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what I did was set the boundary condition of the sphere wall as a moving wall with rotation and a rotational speed. when I ran the simulation I obtained a drag coefficient that is similar to experimental values, however my lift coefficient is significantly smaller, 10 times smaller. Is there any other setting that i need to do in fluent to make it work?
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Old   December 17, 2014, 03:35
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Reference value tab enter the area of your sphere. hope it helps
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Old   December 19, 2014, 15:47
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Actually I did input the area. I eventually managed to find out what the problem was, it was probably due to the low mesh density that I was using since I was restricted to using not more than 500k mesh elements, and having to simulate a 3D football sized sphere, probably is the reason why there was a large error in the lift coefficient.
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