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which boundery should I use?

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Old   August 26, 2008, 23:46
Default which boundery should I use?
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I am analyzing the cavitation flow in the vane pump using star-cd V3.26. For the boundery I used:

1st case. Inlet for inlet & Pressure for outlet

2nd case. Pressure for inlet & Pressure for outlet

result is more accurate in the 1st case than 2nd case. But confusing thing is that when I specified 2bar for saturation pressure(abs) in cavitation panel using Rayleigh model in the 1st case, the pressure I got from result is 1bar in the suction region and interesting thing is that why fluid is not cavitatiing. Any idea why is that? I tried changing reference cell position, but still same.

I have following experimental results:

1.Pressure in inlet and outlet. 2.Flow rate 3.Velosity which I calculated using flow rate.

what boundery should I use? any suggestion is welcome!

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Old   October 5, 2008, 02:14
Default Re: which boundery should I use?
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Is that a rotating model? I also facing a problems of how to setting the boundary conditions.
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