The Venturi tube, which consists of a plain tube with a smooth constriction in its bore at the middle, is one of the most widespread applications of Bernoulli’s Law.
It is found in carburetors, fluid flow meters, and aircraft airspeed indicators, to name a few uses. This demonstration version is made of glass and has three side tubes for attaching an included three-leg manometer filled with colored water to show the relative pressures at significant points of the tube when gas is flowing through it.
A sufficient flow of gas to produce clear differences of water level in the three manometer legs can be generated by blowing through the tube.
The tube is 22cm long, 2.0cm in diameter at the wide ends, and narrows to 10cm in diameter in the middle.
There is tubulation at each end for attaching 6.4mm diameter rubber tubes.
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