You can click on the image to download it in gif format.
You can click on the image to download it in gif format.
At the throat of the meter, where the velocity is the greatest, the pressure is at a minimum- just as Bernoulli's equation predicts.
A venturi Meter is a device used to measure the flow speed of a fluid in a pipe. At the throat, the area is reduce from (A) to (a) and the velocity is increased from (v) to (V). Note that at the throat where the velocity is the greatest, the pressure is least. This we know from Bernoulli's equation, which is:
This equation addresses the conservation of energy involving a fluid.
We can use a form of this equation and the equation of continuity,
The venturi apparatus is available in Rockefeller Rooms 302 and 302B.
The Venturi tubes can be calibrated to read and record the volume flow rate (A*v) of a fluid through a pipe or a hose. With these values recorded, the velocity of the fluid through the hose can be calculated. It can be seen that a change in pressure due to a change in the area will create a corresponding change in the velocity of the flow.
To return to the Mechanics Demo Catalogue .
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