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-   -   inlet temperature = outlet temperature (http://www.cfd-online.com/Forums/fluent/40175-inlet-temperature-outlet-temperature.html)

Thierry March 17, 2006 03:59

inlet temperature = outlet temperature
 
Hi !

Anyone knows how to set as inlet temperature (in a velocty inlet bc) the value of the outlet temperature (mass weighted average) during the computation ? UDF ? Scheme in command ??

ThanX

RoM March 17, 2006 08:36

Re: inlet temperature = outlet temperature
 
Is there any particular reason for this? From a very simple point of view one could argue: inlet temp. = outlet temp. -> adiabatic case -> no need to solve energy equation at all.

RoM

Thierry March 17, 2006 09:34

Re: inlet temperature = outlet temperature
 
It is not an adiabatic case at all. In fact, I want to simulate the flow in a cavity with many walls with different temperatures. Moreover, I would like to set the inlet temperature (in my velocity-inlet condition) as the value of the outlet temperature, which is unkwown before solving the case ! I want to do this because in the real life, the outlet of my cavity is connected to its inlet...but I don't simulate that. OK, I can do this manually, but I would prefer an automatic process. Any idea ??

ThanX


RoM March 17, 2006 09:58

Re: inlet temperature = outlet temperature
 
In this case a DEFINE_PROFILE udf can do the job. If radiation is involved in your calculation you should be very careful while setting a temperature with DEFINE_PROFILE. Your solution will probably diverge if the temperature changes are too high.

Good Luck, RoM

Thierry March 17, 2006 10:14

Re: inlet temperature = outlet temperature
 
Thank you very much...I will try this.

Thierry.


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