Temperature overshoot

hazeljames · September 29, 2015, 22:02

I have successfully run my simulation (convection-conduction problem). I thought it was running smoothly. However, I noticed that the temperature of the test material continues to increase linearly, even exceeding the temperature of the medium. The temperature of the medium is set at a constant temperature of 328K and a heat transfer coefficient of 30W/m^2.K. The initial temperature of the test material is 298K.

I put 'monitor points' in the test material to observe the temperature change on that particular point over time. After a 1-hour (total time) transient run, the temperature at the monitor points have reached up to 346K, way higher than the maximum temperature set for the run.

What could have been the problem? Every advice is highly appreciated.

Opaque · September 30, 2015, 13:38

Your description of the model is incomplete.. You should describe all your boundary conditions to determine if the system is bounded or not.

ghorrocks · September 30, 2015, 17:54

Please post your CCL and an image of what you are modelling.

September 29, 2015, 22:02	Temperature overshoot	#1
hazeljames New Member Hazel James P. Agngarayngay Join Date: Sep 2015 Posts: 1 Rep Power: 0	I have successfully run my simulation (convection-conduction problem). I thought it was running smoothly. However, I noticed that the temperature of the test material continues to increase linearly, even exceeding the temperature of the medium. The temperature of the medium is set at a constant temperature of 328K and a heat transfer coefficient of 30W/m^2.K. The initial temperature of the test material is 298K. I put 'monitor points' in the test material to observe the temperature change on that particular point over time. After a 1-hour (total time) transient run, the temperature at the monitor points have reached up to 346K, way higher than the maximum temperature set for the run. What could have been the problem? Every advice is highly appreciated.

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September 30, 2015, 13:38		#2
Opaque Senior Member Join Date: Jun 2009 Posts: 1,804 Rep Power: 32	Your description of the model is incomplete.. You should describe all your boundary conditions to determine if the system is bounded or not.

September 30, 2015, 17:54		#3
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Please post your CCL and an image of what you are modelling.