Temperature Model

January 3, 2002, 06:34

Hi! As always I have a question and it is: There are two options for Temperature Models for AIR: 1) Enthalpy - Thermal and 2) Enthalpy - Chemico-Thermal. When each of them should be used?

January 4, 2002, 06:50

Just the definition of the enthalpy is different: the two forms reduce to the same equation if no chemical reaction occurs. So without chemical reaction, you can always choose thermal option.

January 5, 2002, 17:29

I think that you are wrong because after I've set the 'Thermal' option for the enthalpy computation the temperature values are OK (they where x2 higher than they shoul be). Now there is another problem: no convergence after 1000 iterations (the enthalpy residual ~0.04).

January 17, 2002, 10:17

There are four choices: STATIC, TOTAL, ROTHALPY and STAGNATION under the item of "Thermal". Have you defined a right one?

January 3, 2002, 06:34	Temperature Model	#1
Julie Polyakh Guest Posts: n/a	Hi! As always I have a question and it is: There are two options for Temperature Models for AIR: 1) Enthalpy - Thermal and 2) Enthalpy - Chemico-Thermal. When each of them should be used?

January 4, 2002, 06:50	Re: Temperature Model	#2
john Guest Posts: n/a	Just the definition of the enthalpy is different: the two forms reduce to the same equation if no chemical reaction occurs. So without chemical reaction, you can always choose thermal option.

January 5, 2002, 17:29	Re: Temperature Model	#3
Julie Polyakh Guest Posts: n/a	I think that you are wrong because after I've set the 'Thermal' option for the enthalpy computation the temperature values are OK (they where x2 higher than they shoul be). Now there is another problem: no convergence after 1000 iterations (the enthalpy residual ~0.04).

January 17, 2002, 10:17	Re: Temperature Model	#4
Jing Guest Posts: n/a	There are four choices: STATIC, TOTAL, ROTHALPY and STAGNATION under the item of "Thermal". Have you defined a right one?

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