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Transforming results in rotating reference frame

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Old   November 27, 2002, 05:50
Default Transforming results in rotating reference frame
Mark Render
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Hi all,

I've calculated a mixer flow with rotating frame of reference. In post processing get the variables in the stationary coordinate system. If I want to have the results seen from the rotating impeller I decided to subtract the circumferancial velocity from my results. And now I'm thinking if I have to manipulate the pressure also ?

Could someone give some thought about that ?


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Old   November 27, 2002, 08:20
Default Re: Transforming results in rotating reference fra
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By pressure I assume you are refering to STATIC pressure. This does not depend on the motion of the reference frame, because pressure at a point is the normal force per unit area exerted on an imaginary surface that is moving at the local fluid velocity. This pressure is isotropic so that orientation of the surface is not important.
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