Capillary number is proportional to { (viscous force) / (surface tension force) } and is used...

Capillary number is proportional to { (viscous force) / (surface tension force) } and is used in momentum transfer in general and atomization and 2-phase flow in beds of solids calculations in particular. It is equivalent to (We/Re).

___________ Which is the friction factor for ReD = 600 and e/D = 0.002 in pipe flow?

___________ What is the friction factor for ReD= 3 x 105 and D/e = 5000 in pipe flow?

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