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-   -   get instationary response (http://www.cfd-online.com/Forums/main/70198-get-instationary-response.html)

hugdev November 17, 2009 05:14

get instationary response
 
Hi!
work on a flow around an airbrake, which in reality has transient solutions. The problem is that cfx always send me the same steady response, even when I lauch the transient mode.
How could I do to get a transient solution, how could I insert the instationarity? are there typical initial conditions, typical boundary conditions to get that kind of transient response?
Thanks for your help
hugh

CP85 November 17, 2009 05:28

Hi,

some things that come into my mind:

Is the mesh fine enough?
Did you try different turbulence-models?
Is the timestep fine enough when performing an instationary solution?
Are the flow velocity and the fluid parameters compareable to reality?


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