(idea) by Professor Pi Mon Oct 09 2000 at 3:24:18

A dimensionless number used in momentum and heat transfer in general and viscous flow and thermal expansion calculations in particular. Proportional to (Re.Gravity force) / (Viscous force).

Ga = (g D3 rho2) / mu2

g: gravitational acceleration, D: diameter, mu: viscosity, rho: density

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