A venturi meter allows one to calculate the flow rate of a liquid through a pipe by measuring the pressure drop across a constricted section (the "choke") and using Bernoulli's equation. In this simulation, water flows through a pipe whose inner diameter is 12.7 mm, and whose choke is 4.07 mm. The manometers along the pipe show the pressure in mm H2O. Turn on the pump using the on/off switch, and adjust the flow rate using the blue valve. The ruler can be dragged to measure the height of liquid in the manometers. Zoom in and out by hovering the mouse above the image and using the scroll wheel. When zoomed in, drag the image using the mouse. Press the "reset" button to refill the source beaker and empty the waste beaker.
This digital experiment was created in the Department of Chemical and Biological Engineering, at University of Colorado Boulder for LearnChemE.com by Neil Hendren under the direction of Professor John L. Falconer and Michelle Medlin. It was prepared with financial support from the National Science Foundation (DUE 2336987 and 2336988) and is based on a Fluid Mechanics experimental kit and accompanying worksheet protocol developed with separate support under NSF 1821578 led by Washington State University. Address any questions or comments to LearnChemE@gmail.com. Our simulations are open source and available on our GitHub.