CFD Online Logo CFD Online URL
Home > Forums > FLUENT

heat transfer coefficient

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   June 4, 2004, 16:35
Default heat transfer coefficient
Jorge Facao
Posts: n/a
Hello, I am modelling a laminar steady 3D flow in rectangular channel. The duct is heated on a top face and others walls are adiabatic. The mass flow rate is constant. Since Gr/Re2 >> 1, it's a free convection problem. I am interested in heat transfer coefficient. Why total surface heat flux on top face is different from the m.cp.(Tout-Tin)? I have modelled several top face temperatures but the heat transfer coefficient is different than the literature correlations. Note that Nusselt number is less than 3, when in forced convection we expect 3.8. When I decrease the temperature difference between top face and inlet temperature, the heat transfer coefficient tend to 0, instead to reach forced convection coefficient. Regards, Jorge Facao
  Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Heat transfer coefficient - what is waht Stan FLUENT 22 August 14, 2017 04:09
Water subcooled boiling Attesz CFX 7 January 5, 2013 04:32
Constant velocity of the material Sas CFX 15 July 13, 2010 08:56
Convective / Conductive Heat Transfer in Hypersonic flows enigma Main CFD Forum 2 November 1, 2009 23:53
Convective Heat Transfer - Heat Exchanger Mark CFX 6 November 15, 2004 16:55

All times are GMT -4. The time now is 01:34.