Demos by PIRA
2A Surface Tension
2A10 Force of Surface Tension
2A10.25Wire sieve boat floats on water until alcohol is added.
2A15 Minimal Surface
2A20 Capillary Action
2A20.10Set of capillary tubes and dye on video camera.
2A30 Surface Tension Propulsion
2A30.10Soap boat or camphor boats in one meter square pan of water.
2B Statics Of Fluids
2B20 Static Pressure
2B20.40Interconnected set of glass vases of different shapes.
2B20.42Pascal's vases: Water in removable vases with pressure gauge.
2B20.60Hydraulic jack with pressure gauge, breaks 2"x 2" piece of wood.
2B30 Atmospheric Pressure
2B30.25Collapse 1 gallon metal can with vacuum pump.
2B30.30Magdeburg's hemispheres(cast iron) evacuated, can't be separated.
2B30.36Suction cup holds large mass suspended from heavy glass plate.
2B35 Measuring Pressure
2B35.15Torricelli Barometer: Column of mercury in bell jar.
2B35.40Large model of aneroid barometer.
2B40 Density and Buoyancy
2B40.20Archimedes' principle: Cup and plug on balance beam.
2B40.30Cartesian divers: Pressure on cap sends divers sinking.
2B40.40The weight of air.
2B60 Siphons, Fountains, Pumps
2B60.60Hydraulic ram water pump, working model.
2C Dynamics Of Fluids
2C10 Flow Rate
2C10.10Water in vertical standpipe with holes at different heights.
2C20 Forces in Moving Fluids
2C20.10Venturi meter: Manometer tubes on tapered wind tunnel tube.
2C20.15Glass standpipes with a constriction. Similar to C+25+10.
2C20.20Glass aspirator: Compressed air draws colored water up glass tube.
2C20.30Bernoulli's principle: Ball suspended in air stream.
2C20.35Compressed air through funnel sucks in ball.
2C20.53Two roof models, hinged, placed in wind stream.
2C20.80Flettner rotorcar blown with fan.
2C30.10Viscosity of air: One rotating disk drives another.
2C40 Turbulent and Streamline Flow
2C40.63Video camera shows fluid flow around various objects.
2C50.30A water vortex in two soda bottles joined vertically.