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-   -   how to define two inlet boundary condition at the different time (http://www.cfd-online.com/Forums/fluent/83047-how-define-two-inlet-boundary-condition-different-time.html)

nuengao December 13, 2010 03:43

how to define two inlet boundary condition at the different time
 
Dear all

pleas give me your suggestion about defining the two boundary condition at the different time for simulation heat transfer:
first time= 0-15s use temperature = 150C, and then time= 15-30s use 91C .

the output that I want to look are the outlet temperature of each inlet boundary condition.

Bernhard December 13, 2010 05:44

You can easily to this by means of a UDF. You can take a look in the UDF Manual, and use the DEFINE_PROFILE subroutine, in which you can base the value on the time. Good luck!

ComputerGuy December 13, 2010 19:40

See a very recent post for examples on how to do (simple) time-varying inlets:

http://www.cfd-online.com/Forums/flu...tml#post287097

Many basic problems like this can be solved by performing a quick search of the forum first.

ComputerGuy


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