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Old   September 11, 2012, 05:25
Question Question about RANS
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Meimei Wang
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Hi,

Turbo machinery is turning when we operate it. So it should be transient fluid behavior. But why we often still use RANS to solve it?
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Old   September 11, 2012, 07:07
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Originally Posted by Anna Tian View Post
Hi,

Turbo machinery is turning when we operate it. So it should be transient fluid behavior. But why we often still use RANS to solve it?
using RANS is correct for flows that are statistically steady (no matter of the transient phase), otherwise you can use URANS, as done in the engine cycle where you have a forcing that is periodi in time
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Old   September 11, 2012, 08:42
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Originally Posted by Anna Tian View Post
Hi,

Turbo machinery is turning when we operate it. So it should be transient fluid behavior. But why we often still use RANS to solve it?
Take a look at http://www.cfd-online.com/Wiki/Best_...omachinery_CFD there is a good explanation about thees topics. Regards
Gonzalo
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