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-   -   Transient boundary conditions in CFX (https://www.cfd-online.com/Forums/cfx/24913-transient-boundary-conditions-cfx.html)

Sohail Ahmed December 11, 2007 13:23

Transient boundary conditions in CFX
 
I have time dependant mass flow rate and rotational speed of impeller. I am interested to apply them as boundary conditions for my transient CFX simulation.

Time - Rotational Speed - Mass flow rate

05/04/07 23:13:00- 1820.399414- 107.6118469

05/04/07 23:14:00- 1104.599854- 71.29267883

05/04/07 23:15:00- 454.1998901- 29.7890358

05/04/07 23:16:00 269.999939 22.62387085

05/04/07 23:17:00 175.1999817 18.00898361

Making expressions for domain rotational speed and mass flow rate seems not a good idea. Can you please help me out in developing these boundary conditions ??

Sohail Germany.

CycLone December 11, 2007 13:29

Re: Transient boundary conditions in CFX
 
Making expression is the way to do it. You enter your values into a 1D interpolation function manually or read them from a file. If the values came from an equation, just use the equation.

-CycLone

Sohail Ahmed December 11, 2007 14:01

Re: Transient boundary conditions in CFX
 
Thanks Cyclone for your quick reply. It works!


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