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-   -   Cn specific heat capacity changes with Temperatur? (http://www.cfd-online.com/Forums/cfx/22768-cn-specific-heat-capacity-changes-temperatur.html)

lightgas June 26, 2006 01:23

Cn specific heat capacity changes with Temperatur?
 
i use a experssion to express specific heat capacity changes with Temperatur(just like gauss distributing),but there is a notice appeared. ****** Notice ****** | | While evaluating Temperature, | | Static Enthalpy on domain hotair | | went outside of its lower limit. Its minimum value was | | -1.1202E+08. The bounds error was handled by extrapolation. | | If this situation persists, consider increasing the table range. i try to changer the table range in the material properities, (intrease the temperature range),but the simulation result seems unreasonable? what shall i do?

macdidi June 27, 2006 09:02

Re: Cn specific heat capacity changes with Tempera
 
This expression, appers alwys when you've to take variable Cp or density depend on pressure and (or ) temperature. If this message disspears afetr a few iterrarions (2 or 3), it will not be a problem, and no influence on your final results Best regards

lightgas June 27, 2006 10:00

Re: Cn specific heat capacity changes with Tempera
 
but in my simulation,the notice didn't disappear, and the result was wrong apparaently. what shall i do?

Robin June 27, 2006 19:35

Re: Cn specific heat capacity changes with Tempera
 
As the warning says, go back to your fluid property definition and set a reasonable table range.

-Robin

S.B.G.S July 7, 2006 06:51

Re: Cn specific heat capacity changes with Tempera
 
OH MY GOD ITS SOOOOOOOOOOO HOT


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