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-   -   Transient boundary conditions (http://www.cfd-online.com/Forums/fluent/46517-transient-boundary-conditions.html)

Yannick November 5, 2007 11:19

Transient boundary conditions
 
Hello everybody,

I'm using fluent 6.2.16 and i have to simulate the inlet manifold of an engine. I'd like to set transient boundary of pressure at the outlet but I understand nothing to the fluent help.

Can someone help me?

Jason November 5, 2007 16:02

Re: Transient boundary conditions
 
Do you mean your B.C at the outle varying with the Time? If it's tru I guss you have to write a UDF to set your B.C correctly.

Jason November 5, 2007 16:03

Re: Transient boundary conditions
 
Do you mean your B.C at the outle varying with the Time? If it's true I guess you have to write a UDF to set your B.C correctly.

Yannick November 5, 2007 17:07

Re: Transient boundary conditions
 
yes, they are varying with the time. I heard about UDF, but I don't know how to do. Where can I find some examples?

Yannick November 6, 2007 06:08

Re: Transient boundary conditions
 
What I need to do is to vary from a wall type condition to a pressure outlet type condition during a time and I don't know what to write in the UDF...

Nia November 6, 2007 08:28

Re: Transient boundary conditions
 
Yau can actually write it within UDFs and you need to write a simple DEFINE_PROFILE macro. You can also fine some example through UDF manual.

Yannick November 6, 2007 08:47

Re: Transient boundary conditions
 
Ok, Thank you. I'll try to do this...


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