average NUSSELT NUMBER THROUGH PIPE

ENG.HVAC · October 14, 2012, 20:24

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, 21:29

Quote:

Originally Posted by ENG.HVAC

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

October 14, 2012, 20:24	average NUSSELT NUMBER THROUGH PIPE	#1
ENG.HVAC New Member MOHSEN HAMED Join Date: Apr 2012 Posts: 12 Rep Power: 14	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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