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The experimental set up consist of a circulartransparent cylindrical tank, which four circumferential jets have been placedalong the circumference of the cylinder near its bottom which helps in theformation of free vortex. It is assumed that the torque exerted by these jetsis negligible. The Orifice is reducing bush so that a reduced diameter can beinvestigated. The plate can also be rotated with the help of a variable speedmotor so that the cylinder rotates about its vertical Axis with the help of a Vbelt and forced vortex is formed. Conditions wear allowed to steady state andthe depth of flow at any particular point was observed not to change over aperiod of time. The experimental procedure involves measurement of resultingfree surface that represents the variation of the sum of the pressure and datumhead.