The Mechanical don

1.◆ Introduction *Fluid dynamics is a study of fluid motion with the forces causing flow. A force may cause of acceleration aur Deceleration depending on its nature. * the Dynamics of fluid is governed by Newton's second law of motion I.e f =m.a * the various forces acting on a fluid mass may be classified as;   a) Body or Volume Forces: these forces are proportional to the volume of the body.   Eg. ; Weight, centrifugal force, electromagnetic force, etc.   b) Surface forces: these forces are proportional to the surface area.   Eg.: pressure force, share or tangential force, force of compressibility, force due to turbulence etc.   c) Linear forces: these forces are proportional to the length.   Eg.: surface tension.   2.◆ Forces acting on fluid in motion:      Following forces act on the fluid during motion: 1. Gravity force 2. Pressure force 3. viscous force                                                                          4. force due to compressibility

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