When you inhale, air flows through the turbinate bones of your nasal passages as shown. Assume that for a short length of 15 mm, the flow is passing through parallel plates, the plates having a total mean width of w = 20 mm and spacing of a = 1 mm. If the lungs produce a pressure drop of ∆p = 50 Pa, and the air has a temperature of 20° C, determine the power needed to inhale air. At T = 20° C, ρa = 1.202 kg/m3 and µa = 18.1(10-6) N.s/m2.

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Fluid Dynamics

The study of the flow of gases and liquids, usually in and around solid surfaces, is known as fluid dynamics in physics and engineering. Fluid dynamics, for example, can be used to evaluate the movement of air through an airplane wing or the surface of a vehicle. It can also be used in ship design to increase the speed at which ships pass through water.