Free and Forced Vortex Apparatus

Free and Forced Vortex Apparatus

Experiment to plot the surface profiles of various forced vortices formed under different speed conditions.
Experiment to plot the shape of a free vortex by measurement of the surface profile co-ordinates, and thus verify that v r = constant where v is the speed and r is the radius of the vortex.
Verification of the formula h=(w² r²)/2g for forced vortices where h is the height of the surface of the water above the datum point; w is the vortex angular velocity and r is the vortex radius.

Cylindrical, transparent vessel 250 mm diameter &180 mm depth,
Set of push-in orifices of 24, 16, 12 and 8 mm diameter.
Inlet tubes of 9.0 mm and 12.5 mm diameter.