Free & Forced Vortex Apparatus

The free vortex experimental set up consist of a circular transparent cylindrical tank fabricated with stainless steelat bottom. Near the bottom of the tank, four circumferential jets are placed along the circumference ofthe cylinder. These circumferential jets, near its bottom, helps in the formation of free vortex. It is assumed that the torque exerted by these jets is negligible. Three different interchangeable openings are provided whichcan easily be fixed at the bottom. A pointer can be transverse horizontally & vertically across full diameter ofthe vessel so that water surface profile can be measure. Both axes contain graduations so that exact position ofthe pointer is known. An arrangement is provided to drain the vessel.The forced experimental set-up consist of a circular transparent cylindrical tank, fixed on a stainless steel plate. This plate is rotated with the help of a variable speed motor so that the cylinder rotates about its vertical axis. The motor is supplied with speed control facility and rotation of the transparent tank is displayed on a Digital RPM Indicator. Water is filled in this tank up to certain level. When this water filled transparent tank rotates, a forced vortex is formed. An upper probe can be transverse horizontally & vertically across full diameter of the transparent tank so that water surface profile can be measure. Both axes contain graduations so that exact position of the probe is known.