- #1
I_laff
- 41
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I am aware of the equation of the velocity of a forced vortex, which is simply ## v = r\omega ##. However, the velocity for a free vortex is ## v = \frac{c}{r} ## (## c ## is the 'circulation constant', ## r ## is the radius, ## v ## is the velocity and ## \omega ## is the angular velocity). I understand why you should expect to see a difference in the equations for both the vortices since the free vortex doesn't have a radial velocity, but where does the equation come from?