How do i set Reciprocating and Rotation motion in Fluent or CFX??

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William Finnegan

Hi Ali,

It is possible to perform this simulation using ansys cfx. The best way to set up the body motions would be to have the body enclosed in a rotating domain, which has as a translational motion. There is a tutorial for the interaction of a wave and a buoy which solves a similar problem.

I hope this is of help to you. Please let me know if you have any additional questions.

Kind regards,

William

Ali Sam

Thanks for your answer,

According to the following attached picture, Rotation domain should be rotate and also have be reciprocation motion(transnational motion). Am i right? Is dividing computational domain correct?

Now, How i set this reciprocation motion in CFX? Is it possible that give me related paper and useful links and tutorials about this case? I found documentations about this case but don't found tutorial about this case.

Thanks.

Hi William

I can't understand the following statement:

" The best way to set up the body motions would be to have the body enclosed in a rotating domain, which has as a translational motion."

Can you explain more in detail about this case?

Thanks

Pouria Amani

Yes, you're right. This case requires a rotating domain placed around the rotor while the stationary wall remains in a stationary domain. The statement that you mentioned above, also, indicates the fact that the best way is to have the body enclosed in a rotating domain.

Regarding to your last question, I have to say in most simulations, it is not necessary to specify any solid material or even any motion in solid domains.

Please, see this link which is about Moving Zones.

Best wishes,

http://www.slideshare.net/Marcushuynh66/cfx12-12-movingzones

Jayanta Barman

Hi all,

I've tried using the rotating domain method for several simulations, but there's always this issue that the fluid in the rotating domain gets a revolving motion too around the axis of rotation.

Any suggestions on how to tackle it?

Fahd El-abd

Hi Jayanta Barman

I have same your problem. I have wall rotating in eccentric center while its rotate around its center. did you solved your case?

Regards.