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LES: fully developed flow at the inlet of a duct

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Old   June 12, 2008, 13:59
Default LES: fully developed flow at the inlet of a duct
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Hi guys

I wanna impose fully developed flow at the inlet of a duct. I do not have much time so what will be best option to do that. All kind of ideas are welcome. Thanks in advance for your help.

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Old   June 13, 2008, 11:24
Default Re: LES: fully developed flow at the inlet of a du
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If you look up Frank White's Fluid mechanics you will get solution for fully developed laminar flow in a duct. You can then impose fluctuations on it if you want turbulent flow at inlet.
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Old   June 13, 2008, 11:48
Default Re: LES: fully developed flow at the inlet of a du
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Hi agg

Thats exactly what I was looking for. How do I impose fluctuations at the inlet? There is no such facility in CFX to do that. Thanks

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Old   June 13, 2008, 17:39
Default Re: LES: fully developed flow at the inlet of a du
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Is it possible to read in inlet profiles every few time steps in CFX? If so, you could have a set of files that you create with the fluctuations superimposed on the mean laminar profile and have CFX read it.
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Old   June 14, 2008, 06:50
Default Re: LES: fully developed flow at the inlet of a du
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But that would only give me interior fluctuations, I was trying to obtain fluctuations at the inlet boundary. Thank you for your answer.

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