A water vortex in two soda bottles joined vertically.
2C50.30 • C+25+50
Vortex is created in water draining from one bottle to another. Two plastic bottles are joined at the neck. Colored water almost fills the bottom bottle. Inverting the setup, and giving the liquid a rotary spin causes a vortex to form, draining the water quickly from the top to bottom bottle. (Without the rotary motion, the water slowly percolates down.) SURFACE TENSION AND CAPILLARY ACTION.
Related Demos
C+25+0 Flettner rotorcar blown with fan. C+25+2 Smoke Ring Generator C+25+4 Airzooka C+25+5 Bernoulli's principle: Ball suspended in air stream. C+25+10 Glass standpipes: Water flows through tube, heights vary. C+25+11 Glass standpipes with a constriction. Similar to C+25+10. C+25+15 Glass aspirator: Compressed air draws colored water up glass tube. C+25+16 Compressed air through funnel sucks in ball. C+25+17 Compressed air attracts card with pin to holder. C+25+20 Venturi meter: Manometer tubes on tapered wind tunnel tube. C+25+25 Pitot tube inserted in wind stream with manometer indicator. C+25+30 Two roof models, hinged, placed in wind stream. C+25+35 Video camera shows fluid flow around various objects. C+25+40 Water in vertical standpipe with holes at different heights. C+25+42 Marriote’s Bottle. Vertical standpipe with constant water pressure C+25+45 Hydraulic ram water pump, working model. C+25+55 A vortex tube seperates compressed air into jets of hot and cold air. C+25+60 Pythagorean Cup and self starting siphons C+25+60 Applet: Fluid Pressure and Flow C+25+65 Applet: Vector Fields C+25+70 Applet: Faraday's Law C+25+75 Extreme Spin on Launched Ball C+25+80 Faucet for demonstration C+25+82 Large sphere surrounded by small spheres rises to surface C+25+85 Siphon from one beaker to another C+25+90 Bernoulli effect: objects drawn together