average interior temperature less than the operating temperature

Naher · March 30, 2011, 01:58

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, 04:38

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, 22:26

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, 08:57

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

Naher · April 1, 2011, 00:14

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, 01:58	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?

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March 30, 2011, 04:38		#2
xrs333 Senior Member xrs333 Join Date: Aug 2010 Posts: 125 Rep Power: 17	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, 22:26		#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, 08:57		#4
xrs333 Senior Member xrs333 Join Date: Aug 2010 Posts: 125 Rep Power: 17	Ambient temperature is not necessarily defined as operating temperature. Check for these of your model, please: partial enclosure temperature ExternalBlackBodyTemperatureMethod

April 1, 2011, 00:14		#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.