how to define ogmea in planar reference frame

goshawksky

hi, i want to solve a problem through dynamic mesh in fluent. the question is: in a planar reference frame, a subject run around the origin at the ogmea=3rad/s ,for example. i am gonna to define the ogmea of the subject in udf to descibe the move, i know in a planar reference frame ,the direction of omega is vertical to the plane, how to write omega in udf? w[0]=0;w[1]=0;w[2]=3;is right? however,w[2]=0 is defalted in fluent help. so i am puzzled , please tell me how to define the omega ?