Pipe Report

Topics: Viscosity, Fluid dynamics, Fluid mechanics Pages: 3 (541 words) Published: February 24, 2015

In any pipe system there is going to be a loss of energy due to the effect of viscosity from a fluid acting upon the surface of the pipe, this is called Friction Loss. This type of lost depends on the shear stress due to the walls of the pipe and the fluid. It also depends in weather the fluid is laminar or turbulent. A major difference between these two flows is that due to a viscous layer created in turbulent flow the roughness of the pipe can be taken in account while in laminar flow, it can be neglected because that layer is not created. Many factors are taken in account when we want to measure the energy lost during the trajectory of a fluid through a pipe such as, distance, diameter, roughness of the surface, viscosity of the fluid, all affect friction loss. However, many of the aforementioned factors are considered “minor loss,” but friction loss is considered a “major loss.” The frictional resistance to which a fluid is subjected, as it is moving along a pipe it continuously losses energy going downstream. The mean velocity in the pipe (remains constant) the friction factor f is defined by

And the Reynolds number can be obtained by

For typical flows in smooth pipes, laminar flow corresponds to Re4000, and the laminar/turbulent transition is 2300
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