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JAS February 7, 2007 06:58

fully developed flow
Hi all: Can anyone guide me to how can I make the flow fully developed from the inlet of the pipe (i.e. No change of velocity profile in the x-direction) because I have a paper with fully developed two phase flow and i need to predict the liquid holdup for this case.

Thanks JAS

Nak February 7, 2007 11:27

Re: fully developed flow
You can use a UDF (refer FLUENT manual) or just extend the inlet upstream so that you have an addtional pipe length of 5-7 times diameter.

Hope it helps.

kk February 7, 2007 12:18

Re: fully developed flow
1.UDF if you have the profile data. 2.extend the inlet section for at least 5 time of the characteristic length, diameter in this case. 3.import profile from a full develop flow pipe.(favourite way).

JAS February 12, 2007 06:55

Re: fully developed flow
Thanks to the answer , can you tell me how can i extend the inlet? Did you have any UDF?

Thanks JAS

JAS February 12, 2007 07:01

Re: fully developed flow
HI thanks to the answer can you tell me to how can I did the last two ways from your previous answer.


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