Fluid Mechanics and Machinery by C P Kothandaraman

By C P Kothandaraman

Numerical examples for every of the equations derived; Solved difficulties to spotlight entire spectrum of purposes; aim questions for self review; Graded difficulties for workouts, as a rule with answers

This publication is meant to be used in undergraduate classes of civil, mechanical and chemical engineering; the SI method of devices is followed all through. with the intention to supply huge perform within the software of assorted techniques, the next structure is utilized in all of the chapters. Enunciation of uncomplicated thoughts; improvement of actual and mathematical versions with interspersed numerical examples; Illustrative examples related to the appliance and extension of the types built; aim questions and workout difficulties

desk of Contents: actual homes of Fluids/ strain Distribution in Fluids/ Forces on Surfaces Immersed in Fluids/ Buoyancy Forces and balance of Floating our bodies/ Fluid Flower simple suggestions Hydrodynamics/ Bernoulli Equation and functions/ circulation in closed Conduits (Pipes)/ Dimensional research/ Similitude and version checking out/ Boundary Layer thought and circulate over Surfaces/ stream Measurements/ circulate in Open Channels/ Dynamics of fluid circulation/ Hydraulic generators/ Rotodynamic Pumps/ Reciprocating Pumps/ Appendix

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81 N/m3, equating forces, [h × γ × π D2/4] = [π × D × σ × cos β]. 92 mm of mercury. 24. 022 N/m. 5 N/m2. 25. 45 N/m2. The contact angle is 60°. Determine the additional force required due to surface tension. In this case a capillary rise will occur and this requires an additional force to keep the cylinder floating. Capillary rise, h = {4 × σ × cos β}/{γ × D}. 106 N As the immersion leads to additional buoyant force the force required to kept the cylinder floating will be double this value. 212 N.

10. Determine the power required to run a 300 mm dia shaft at 400 rpm in journals with uniform oil thickness of 1 mm. Two bearings of 300 mm width are used to support the shaft. 03 Pas. (Pas = (N/m2) × s). 995/60 = 670 W. (check using eqn. 2. 2. µ. 4) or Pa s. 11. 3 m OD transmitting power, if 50 W was required to overcome viscous friction while running at 700 rpm. The oil used has a viscosity of 30 cP. 682 Nm Figure Ex. 11 This is a situation where an annular surface rotates over a flat surface.

8 W. 29/60 = 458W. 18. Determine the capillary depression of mercury in a 4 mm ID glass tube. 45 N/m and β =115°. 19. A ring 200 mm mean dia is to be separated from water surface as shown in figure. 1005 N. Determine the surface tension of water. 19 The total length of contact just before lifting from the surface will be twice the circumference or 2πD. The force will equal the product of surface tension and the length of contact. 1005 N. 08 N/m The surface tension of a liquid can be measured using this principle provided the fluid wets the surface.

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