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-   -   Steady problem and unsteady mode (http://www.cfd-online.com/Forums/fluent/36224-steady-problem-unsteady-mode.html)

mini March 31, 2005 21:55

Steady problem and unsteady mode
 
Hi, Can I use the unsteady mode to simulate the steady problem? Thanks.

hongxiao April 1, 2005 00:07

Re: Steady problem and unsteady mode
 
sure

debs April 1, 2005 02:37

Re: Steady problem and unsteady mode
 
The accuracy of the algorithm reduces when you use the unsteady mode for a problem which looks steady.

ap April 1, 2005 08:14

Re: Steady problem and unsteady mode
 
Each steady problem can be considered as the "final" state of an unsteady problem.

So you can simulate a steady case considering its evolution in time, waiting until it reaches the steady condition and averaging on a proper time interval.

Best regards, ap

Suggestion April 1, 2005 16:22

Re: Steady problem and unsteady mode
 
You will need to be sure though that you do not have an undsteady case. i.e. a flapping jet or vortex shedding etc. In these cases you will not have a steady solution.

ap April 1, 2005 18:12

Re: Steady problem and unsteady mode
 
Well, sure.

You can simulate a steady case as unstedy. The viceversa is obviously not true.

Regards, ap

mini April 3, 2005 20:28

Re: Steady problem and unsteady mode
 
Thanks.


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