Source Term in Cylindrical Coordinate.
 

Hello, I am using 3D euler equ.s for turbomachine problems. The equations are in fixed frame of reference. I have a doubt about source term in momemtum equ.s for radial and tangential velocity. I am using presently the equ. as Given in "Transport Phenomena" by Bird, Stewart & Lightfoot. I came across a paper in J of Turbomachines 1991, which gives souce terms which are different than the terms given in Bird .. Now which is the correct source term I am in a fix.

Thanks

Apurv