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-   -   Translating frame of reference (http://www.cfd-online.com/Forums/cfx/19658-translating-frame-reference.html)

blair May 28, 2003 05:13

Translating frame of reference
 
Hi, I am trying to model a body moving through a fluid domain. I have already got results by modelling the body as stationary and defining inflows into the domain. However ideal I would like to give the body itself a velocity, using a moving mesh. It seem that this would be possible using a moving coordinate system... however I have no clue how to achieve this. Any suggestion would be gratefully recieved. Thank you Blair

blair May 28, 2003 05:14

Re: Moving frame of reference
 
Sorry, I think this title is more appropriate for my original post

Glenn Horrocks May 28, 2003 18:13

Re: Moving frame of reference
 
Hi Blair,

Which code are you using? But you definitely can do this in CFX4, and you should be able to do this using the moving grid beta feature in CFX5.

Glenn

blair June 2, 2003 07:13

Re: Moving frame of reference
 
I am using CFX5.5.1

I have not been able to find the moving grid beta feature in any of the help files. I would greatly appreciate any suggestions.

blair

Glenn Horrocks June 2, 2003 18:51

Re: Moving frame of reference
 
Hi Blair,

It is not documented because it is a beta feature, and hence not guaranteed to be correctly implemented. I understand that it is planned to be part of CFX 5.7, which is quite some time off release yet!

I have emailed you a def file which demonstrates moving grids in CFX5.5.1/5.6. Be warned - as it is a beta feature it is not guaranteed to be accurate, and has some weird quirks - it is not for inexperienced users of CFX. But I have managed to do some interesting work using it, so if you're keen give it a go.

Glenn


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