bulk temperature

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 August 12, 2011, 18:26 bulk temperature #1 New Member   amin hosseini Join Date: Aug 2011 Posts: 1 Rep Power: 0 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-

 September 23, 2012, 03:11 #2 New Member   Join Date: May 2011 Posts: 2 Rep Power: 0 I have same problem,please help us

September 25, 2012, 20:51
#3
Senior Member

Syavash
Join Date: Apr 2010
Location: Tehran, Karaj
Posts: 241
Rep Power: 8
Quote:

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

Bests.

 September 26, 2012, 01:42 #4 New Member   pooja jhunjhunwala Join Date: Sep 2012 Posts: 1 Rep Power: 0 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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