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Old   November 19, 1998, 22:50
Default turbulent flow.......
  #1
Daejin,Kang
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What is the best of the turbulent model that expressed the swirl flow......????
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Old   November 20, 1998, 07:08
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Abdul Aziz Jaafar
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Dear Daejin

In the rotating disc system for example, the flow away from the wall could follow a free vortex behaviour. In this case the k-e model or rstm model could reasonable capture this. If rankine vortex dominated, perhaps rstm is the best choice, as the standard k-e model, as seen the some flow problem give premature tarnsition to solid body flow. Some of the research worker improved the k-e solution by introducing several correction to the epsilon transport equation.

Hope this help

A. Aziz Jaafar
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Old   November 20, 1998, 13:44
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Y Wang
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Dear Abdul Aziz Jaafar,

Could you please tell me details of the researcher mentioned in your message? I am calculating the through flow in a cylindrical annulus with rotating inner cylinder and I have not found suitable test cases yet.

Thanks!

Yi Wang
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Old   November 20, 1998, 15:21
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Abdul Aziz Jaafar
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Dear Wang

Could you please decribe briefly the physical situation of your problem. You could find several flow and heat transfer problem in rotating disk system such as given in monograph below :

1. Owen and Rogers; Flow and heat transfer in rotating disc system : Vol 1: Rotor-stator system

2. As above, Vol 2: Rotating cavities

both by Research studies Press Taunton

Hope this could help

A. Aziz Jaafar
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Old   November 23, 1998, 12:11
Default Re: turbulent flow.......
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Casey McCurry
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If one were to use the "toilet" example on this situation, what would be the effects on velocity of the swirl?
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