Quote:
Originally Posted by i_am_socket
now if I just knew what Re and dt are supposed to represent...
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Reynolds Number = ( L * v ) / 'nu'
L = Effective length (or diameter of pipe) [m]
v = velocity [m/s]
'nu' = Greek letter 'n' = kinematic viscosity [m^2/s] (~1.6*10^-5 for air @ 20C)
Re is an indicator of effective flow when comparing scale models of real things (3/8 scale, or ?) - 2X speed for something half the size. So, in the modelling programs, a correct Re must be used.
For nearly all objects there is a typical Re number where transition occurs from laminar to turbulent flow. (a Moody diagram [pipe flow] shows this well)