1. The instantaneous volume Q drained by an orifice of diameter d from a circular tank of diameter D, when the head is h depends on the density and viscosity of the fluid and acceleration due to...

1. The instantaneous volume Q drained by an orifice of diameter d from a circular tank of diameter D, when the head is h depends on the density and viscosity of the fluid and acceleration due to gravity. Determine the π terms to correlate the flow.

2. In the atomization of a fluid by passing it through an orifice under pressure, the droplet size d is believed to depend on the jet diameter D, jet velocity u, and the density, viscosity and surface tension of the lqiuid. Determine dimensionless parameters for the phenomenon.