UDF to change Rotation Speed in a MRF simulation

September 5, 2008, 10:00

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

September 5, 2008, 17:13

accelerating udf for MRF is available on fluentusers.com. This has been in existence for a long time now.

September 6, 2008, 03:39

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.

September 5, 2008, 10:00	UDF to change Rotation Speed in a MRF simulation	#1
Mike Guest Posts: n/a	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

September 5, 2008, 17:13	Re: UDF to change Rotation Speed in a MRF simulati	#2
red lemon Guest Posts: n/a	accelerating udf for MRF is available on fluentusers.com. This has been in existence for a long time now.

September 6, 2008, 03:39	Re: UDF to change Rotation Speed in a MRF simulati	#3
Mike Guest Posts: n/a	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.

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September 27, 2011, 07:46		#4
amini_p New Member amini Join Date: Jul 2011 Posts: 1 Rep Power: 0	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.