I am solving flow in driven cavity(taking incompressible novier-stokes equation)how can i find out reynolds number(I have mue ,rho values & i have taken square cavity).
Reynold's Number is defined as:
Re = (\rho) *(Velocity Scale)*(length Scale)/ (\mu)
1. Determine your velocity scale. It could be the speed of your driving force?
2. Determine your length scale. size of box?
Usually other researchers will have already defined a Reynolds number. Its good to take their definition so you can compare results.
Re: giving more help!
see: Fluid mechanics in a driven cavity
P.N. Shankar and M.D. Deshpande
Annual Review in Fluid Mechanics
this should give you too much info. :)
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