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Old   August 12, 2011, 18:26
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amin hosseini
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hi friends ,
I wish you good moments
must polt the nusselt number in a circular tube under the condition that : constant flux and constant wall temperature
we know the nusselt number after the developed region undert this conditions are 4.36 and 3.66
but my nusselt number is very large !
I think my problem is the bulk temperature !
but I don't know how can I correcte this problem ,
help me please step by step if you konw ,
I need the plot af nusselt number that leading to 4.36 and 3.66
thank you dears ,
-in fluent software-
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Old   September 23, 2012, 03:11
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I have same problem,please help us
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Old   September 25, 2012, 20:51
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Ehsan Asgari
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Originally Posted by shahvar View Post
I have same problem,please help us

Could you manage to solve the problem?! If not, I have some hints for you!

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Old   September 26, 2012, 01:42
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pooja jhunjhunwala
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you should use udf for bulk temperature,as u must be knowing that bulk temperature is integration of u(r)T(r)rdr /integration of u(r)rdr...where u is avg.velocity T is temperature and r is radius of ur pipe and limit is from 0toR

Last edited by POOJAJJW; September 26, 2012 at 02:00.
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