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Old   April 24, 2008, 05:34
Default Chimney
  #1
Aminop
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Hey everybody, I'm working on a vertical chimney, wich evacuate the gaz naturaly (naturel convection) but i stuck with the boundary conditions; does anyone can tell what to use at the inlet and outlet of the chimney, and how to tell Fluent that a depresion of -2285 Pa exist between the inlet and outlet? Thanks for helping me.

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Old   April 29, 2008, 14:41
Default Re: Chimney
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Allan Walsh
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Pressure boundary conditions at inlet and outlet.
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Old   April 30, 2008, 04:37
Default Re: Chimney
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Aminop
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thank you Allan for your reponse, the boundary that you suggest me are OK, but how to introduce the value of the depression -2285Pa between the inlet and outlet?

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Old   April 30, 2008, 14:34
Default Re: Chimney
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Allan Walsh
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Type it in. For example, set the static pressure at the bottom as 0 Pa and the top -2285 Pa. Am I missing something in your question? 2285 Pa difference from bottom to top is quite a bit for something like flue gas and should develop a relatively high velocity. Good Luck.
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Old   May 2, 2008, 05:16
Default Re: Chimney
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Aminop
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thank you Allan, I did this before but as you said i get a very high velocity witch does not verifie the experimental investigation, my problem is a chimney of 200 m,and i found that we have a depression of about -2285.
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Old   May 7, 2008, 10:03
Default Re: Chimney
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Raha Ernest
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I know you guys would have a clue that would help me in my problem with modellng buoyancy in fluent. I would enjoy long conversations over e.mail or a talk over the phone, i am in UK and wouldn't mind calling across countries. my e.mail rahaernest(at)yahoo.co.uk

I would appreciate your support

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Old   May 7, 2008, 10:04
Default Re: Chimney
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Raha Ernest
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Hi Allan

I know you guys would have a clue that would help me in my problem with modellng buoyancy in fluent. I would enjoy long conversations over e.mail or a talk over the phone, i am in UK and wouldn't mind calling across countries. my e.mail rahaernest(at)yahoo.co.uk

I would appreciate your support

Raha Ernest
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