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ENG.HVAC October 14, 2012 19:24

average NUSSELT NUMBER THROUGH PIPE
 
DEAR ALL
I have aproblem that my case is
* constant heat flux
* straight pipe
when i get the average nusselt number i see that the ref. value of temperature
is the temperature of the inlet fluid
and really the temperature is not the inlet temperature it is higher than it
can any one help me

syavash October 14, 2012 20:29

Quote:

Originally Posted by ENG.HVAC (Post 386584)
DEAR ALL
I have aproblem that my case is
* constant heat flux
* straight pipe
when i get the average nusselt number i see that the ref. value of temperature
is the temperature of the inlet fluid
and really the temperature is not the inlet temperature it is higher than it
can any one help me

Hi,
The ref. temperature is what you define in ref. value panel. For pipe flow one may consider different ref. temperatures including inlet temperature or bulk mean temperature or whatsoever.
Goodluck


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