On a circular conduit there are different diameters: diameter D1 = 3 m changes into D2 = 4 m. The velocity in the entrance profile was measured: v1 = 4 ms-1. Calculate the discharge and mean velocity at the outlet profile (see fig. 1). Determine also type of flow in both conduit profiles (whether the flow is laminar or turbulent) – temperature of water T = 12° C. Kinematic viscosity of water of 12°C is 1.24 x 10-6.

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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.