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Pei-Ying Hsieh April 4, 2006 17:36

rotating reference frame
Hi, dear cfd experts:

To compute flow in rotating reference frame, centrifugal force and coriolis force are added into the mementum equation.

For constant rotational speed, omega,

centrifugal force = omega X (omega X r) (where r is postion vector). coriolis force = -2m(omega X U)

What if omega varies with time? Is there any extra force term needed to be added into mementum eq?



ag April 5, 2006 08:54

Re: rotating reference frame
You will also have a term composed of the time derivative of omega crossed with the position vector. It has the same sign as all the other noninertial terms.

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