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Optimum Size of Rotating Domain in MRF

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Old   September 9, 2009, 06:02
Default Optimum Size of Rotating Domain in MRF
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What is the optimum size of the rotating domain (which is the interface b/w rotaing and stationary regions) around the rotating part, while simulating rotation using MRF approach. Should i use sufficiently large domain or very closely hugging domain to the rotating body or it depends upon the shape and geometry of rotating body !

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Old   September 9, 2009, 17:51
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I always try to keep the rotating flow within the rotating reference frame as much as possible. If simulating an axial fan I think that it is best to hug the rotating body on the upstream side, but extend as far downstream as possible. It is questionable if this is really necessary, but that is how we do it.
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