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Flow through Curved Pipes

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If the pipe is not straight, the velocity distribution over the
section is altered and the direction of flow of fluid is continuously
changing. The frictional losses are therefore somewhat greater than for
a straight pipe of the same length. If the radius of the pipe divided
by the radius of the bend is less than about 0.002 however, the effects of the
curvature are negligible.

It has been found that stable streamline flow persists at higher values
of the Reynolds number in coiled pipes. Thus for instance, when
the ratio of the diameter of the pipe to the diameter of the coil is
1 to 15, the transition occurs at a Reynolds number of about 8000.

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Last Modified on: 14-Sep-2014

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