FM 100.22A Free and Forced Vortex, Rotating Tank

fm-100xx-vortex-motor.jpgClear acrylic cylindrical tank inside which is another smaller perforated clear acrylic cylinder. The tank is rotated by a small variable speed DC motor. A small hole is provided at the centre of the bottom of the tank. A forced vortex is formed when a fixed amount of water is contained in the rotating vessel. A free vortex is formed when water is admitted at the annulus and drain through the bottom hole. A cross bar with scale and a sliding probe holder are provided above the vessel. Water surface profile is measured by a depth probe attached to the cross bar. A transparent tube with built-in pitot probe to measure total head is also attached to the cross bar.

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