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-   -   UDF to change Rotation Speed in a MRF simulation (http://www.cfd-online.com/Forums/fluent/49193-udf-change-rotation-speed-mrf-simulation.html)

Mike September 5, 2008 10:00

UDF to change Rotation Speed in a MRF simulation
 
Does anybody know if it's possible define a UDF to change the rotation speed in a Moving Reference Frame unsteady simulation? If you have a variation in time of a variable (x-component of velocity for example) you can write the udf to give an u(t) law and than load it in the boundary-condition (velocity inlet) panel. For fluid, when you define the MRF there is NOT the menu to load the user-defined variable! How can I do?

Thank to all Bye

red lemon September 5, 2008 17:13

Re: UDF to change Rotation Speed in a MRF simulati
 
accelerating udf for MRF is available on fluentusers.com. This has been in existence for a long time now.

Mike September 6, 2008 03:39

Re: UDF to change Rotation Speed in a MRF simulati
 
Thank you red lemon.If you have it, can you post here?

Another information : is possible a similar udf also for Sliding Mesh acceleration? Thank you so much.

amini_p September 27, 2011 07:46

Hi,
I need UDS that change the rotation speed in a Moving Reference Frame unsteady simulation so, have you it? i couldn't find it on fluentusers.com.

thanks a lot for your help.


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