Consider a 20°C fl ow at 2 m/s through a smooth 3-mmdiameter microtube which consists of a straight run of10 cm, a long radius bend, and another straight run of10 cm. Compute the total pressure drop if the fl uid is(a) water; and (b) ethylene glycol.

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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.