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Rotating arm turbulence

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Old   May 31, 2019, 06:12
Default Rotating arm turbulence
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Hey all.

I have a problem with a simulation that I am running. The simulation is a rotating arm within an octagonal enclosure. The purpose of the simulation is to estimate the minimum boundary between the end of the arm and the enclosure wall. The arm rotates at 175 rad/s.

I am using a realizable k-epsilon turbulence model with standard wall functions. I have chosen a steady state solution with a moving wall.

Online theory suggests that turbulence of 10% is considered high. The turbulence that my model is outputting is at least 10 times that.

Any help that anyone can give is appreciated. Am I using the correct model? Is there a better way to estimate the minimum distance between the arm and the wall?


Cheers,

collie
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fluent 19.1, rotating body, turbulence intensity

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