Machine Parts

  Flow Nets A grid obtained by drawing a series of streamlines and equipotential lines is known as a flow net. The flow net provide a simple graphical technique for studying two dimentional irrotational flows especially in the cases where mathematically relations for steam function and velocity function are either not available   to are are rather difficult and cumbersome to solve.   Use of flow nets: 1.       Determaination of   the design of the outlets for their streamlining. 2.       Determaination of quantity of seepage and upward lift pressure bellow the hydraulic structure. 3.       Determaination of the streamlines and equipotential lines. 4.       Determaination of the pressure and velocity distribution, for given boundaries of flow. Limitations of flow nets: 1.       The flow net analysis can not be applied in the region close to the boundary where the effects of viscosity are predominant. 2.       In case of a flow of a fluid past a solid

  Fluid mechanics one branch is fluid kinematics . It deals with the study of velocity and acceleration of the particles of fluids in motion and their distribution in space without considering any force or energy involved.   The motion of fluid can be described fully by an expression describing the location of a fluid particle in space at different time’s thus enabling determination of the magnitude and direction of velocity and acceleration in the flow field at any instant of time. Methods of Fluid Motion: There have two methods for fluid motion. a.       Eulerian method: In this method, the observer concentrates on a point in the fluid system. Velocity acceleration and other characteristics of the fluid at that particular point are studied. Eulerian method is exclusive method in flid mechanics because of it’s mathematical simplicity. b.       Langrangian method: In this method the observer concentrates on the movement of a single particle. The path taken

a.        Unstable Equilibrium b.       Stable Equilibrium c.        Neutral Equilibrium   Unstable Equilibrium: When given a small angular displacement if the body does not return to its original position from the slightly displace original position and heels further away, these types of equilibrium is called unstable equilibrium. Stable Equilibrium: By providing some external force and then it’s return back to its original position due to internal forces such as the upthrust and the weight, when a body is given a small angular displacement. This types of equilibrium is called stable equilibrium. Neutral Equilibrium: If a body   occupies a new position and remains at rest in this new position , when given a small angular displacement.                                         What is Buoyancy?     Characteristics of a Centrifugal Pump     Merits of Centrifygal Pump   Classification of Centrifugal Pump