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Football magnus effect analysis

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Old   April 7, 2024, 10:33
Default Football magnus effect analysis
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Patryk
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Hi there,


I am trying to analyse the effect of surface geometry on the magnus effect induced by a football during flight.


I have set up a simulation using guidance from this video:
https://www.youtube.com/watch?v=rN9hj_kwfOU


With the velocity inlet and outlet set to 26m/s in -1 X direction.
Rotation of 37.699 rad/s along the Y direction.
Air is default, 1.225 constant density.
Solver being used is the realizable k epsilon solver.



I'm struggling to get a converged result for the magnus force and drag coefficient, as the residuals seem like they're 'stuck'. Each time-step converges in around 40 iterations, then it seems like the same calculation occurs again.


I have attached images below.


Any help is much much appreciated.


Thanks,
Patryk
Attached Images
File Type: jpg dragcoeffplot.jpg (20.2 KB, 2 views)
File Type: jpg residuals.jpg (35.1 KB, 2 views)
File Type: jpg sidecoeffplot.jpg (20.7 KB, 2 views)
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ball, fluent, football, magnus, rotation

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