Mechanical Engineering Handbook: For The Engineers by Feroz Navy

Author:Feroz, Navy [Feroz, Navy]
Language: eng
Format: epub
Published: 2018-02-27T16:00:00+00:00

(k) The loss of head due to friction in a pipe of uniform diameter in which a viscous flow is taking place is 16/Rn, where Rn is Reynold's number.

40. VISCOUS RESISTANCE

Though the theory of viscosity has a number of applications, yet the viscous resistance on bearings is important. The following points may be noted for viscous resistance:

(a) Torque required to overcome viscous resistance of footstep bearing is:

Where,

N = Speed of the shaft ,

R = Radius of the shaft, and

t = Thickness of the oil film.

(b) Torque required to overcome viscous resistance of a collar bearing is

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