An air current moving vertically upward at 5 m/s carries raindrops of various sizes. Calculate the velocity of a 2-mm-diameter drop and determine whether it is rising or falling. Repeat this exercise for a 0.2-mm-diameter drop. Assume standard atmospheric pressure and air temperature 20 ̊C. Air density = 1.20 kg/m3 also determine the precipitation intensity if the surface temperature is 20˚C.

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Applied Fluid Mechanics

A fluid is a substance that is continuously deformed by the application of shear stress. The rate of deformation of a fluid depends on its viscosity. The fluid tries to flow when it interacts with some other system.