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Water flow which slip along the interface instead of entering into it

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Old   August 2, 2015, 12:32
Default Water flow which slip along the interface instead of entering into it
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Dear all,

I am simulating a rotating domain with some blades. The water enters from the inlet over the domain and as a free jet should fall into the rotating domain. But, as you can see from the picture, it seems that the water can't enter into the rotating domain, but slips along it. Between the rotating domain and the external stationary domain I have provided interface zones. The water then enter into the domain, but not where it should phisically enter, but more far away.

Do you know why? Probably because the water absolute velocity is more or less parallele to the tangential velocity of the rotating domain?

Thank you
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free jet, inlet boundary condition, rotating domain, turbine, wheels

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