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average NUSSELT NUMBER THROUGH PIPE

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Old   October 14, 2012, 19:24
Default average NUSSELT NUMBER THROUGH PIPE
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MOHSEN HAMED
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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
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Old   October 14, 2012, 20:29
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Syavash
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Quote:
Originally Posted by ENG.HVAC View Post
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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