Water is flowing in a straight horizontal insulated pipe of 25 mm i.d. There is nodevice present for adding or removing energy as work. The upstream velocity is 10 m/s. The waterflows in a section where the diameter is suddenly increased. (a) What is the change in enthalpy if thedownstream diameter is 50 mm? (b) What is the maximum enthalpy change for a sudden enlargementin pipe?

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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.