average interior temperature less than the operating temperature

Naher · March 30, 2011, 00:58

Dear All,
I am simulating an enclosure with one wall-constant heat flux, another wall-mixed boundary condition. I am considering s2s model and boussinesq approximation. And I have two pressure inlet and one pressure outlet. But I am getting the average interior temperature less than the operating temperature. How does it possible? Can anybody please help me?

xrs333 · March 30, 2011, 03:38

That is not impossible.
Temperature is determined by heat balance of the system and constitutive equation, not the operating temperature, which is only used in Boussinesq model.

Naher · March 30, 2011, 21:26

Dear xrs333
Thank you very much for your comment … In my case heat is added to the system, so ambient temperature, which is defined as operating temperature must be the minimum temperature..isn’t it?

xrs333 · March 31, 2011, 07:57

Ambient temperature is not necessarily defined as operating temperature.
Check for these of your model, please:
partial enclosure temperature
ExternalBlackBodyTemperatureMethod

Naher · March 31, 2011, 23:14

Thanks for your reply. I already checked the external black body temperature and partial enclosure temperature (although, I do not have any non-participating wall in the model). I have defined these temperatures as 300 K. However, the result for the average interior temperature is less than 300 K.

March 30, 2011, 00:58	average interior temperature less than the operating temperature	#1
Naher New Member Naher Join Date: Mar 2011 Posts: 7 Rep Power: 15	Dear All, I am simulating an enclosure with one wall-constant heat flux, another wall-mixed boundary condition. I am considering s2s model and boussinesq approximation. And I have two pressure inlet and one pressure outlet. But I am getting the average interior temperature less than the operating temperature. How does it possible? Can anybody please help me?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Computing Average Temperature using DEFINE_ADJUST macro	T81	Fluent UDF and Scheme Programming	13	October 16, 2017 06:58
operating temperature for water in porous media	engahmed	FLUENT	0	March 3, 2010 16:21
Specifying operating temperature in buoyancy flow	PAD	FLUENT	4	June 29, 2006 14:44
OPERATING TEMPERATURE!!!!!!!!!!!!!!	Anne	FLUENT	3	March 28, 2006 04:33
Temperature Average	Danny	FLUENT	0	May 3, 2005 05:47

March 30, 2011, 03:38		#2
xrs333 Senior Member xrs333 Join Date: Aug 2010 Posts: 125 Rep Power: 16	That is not impossible. Temperature is determined by heat balance of the system and constitutive equation, not the operating temperature, which is only used in Boussinesq model.

March 30, 2011, 21:26		#3
Naher New Member Naher Join Date: Mar 2011 Posts: 7 Rep Power: 15	Dear xrs333 Thank you very much for your comment … In my case heat is added to the system, so ambient temperature, which is defined as operating temperature must be the minimum temperature..isn’t it?

March 31, 2011, 07:57		#4
xrs333 Senior Member xrs333 Join Date: Aug 2010 Posts: 125 Rep Power: 16	Ambient temperature is not necessarily defined as operating temperature. Check for these of your model, please: partial enclosure temperature ExternalBlackBodyTemperatureMethod

March 31, 2011, 23:14		#5
Naher New Member Naher Join Date: Mar 2011 Posts: 7 Rep Power: 15	Thanks for your reply. I already checked the external black body temperature and partial enclosure temperature (although, I do not have any non-participating wall in the model). I have defined these temperatures as 300 K. However, the result for the average interior temperature is less than 300 K.