How to Calculate Shear Rate

By Soren Bagley
Shear Rate

Shear rate is a measurement used to describe the movement of fluid through a channel. Specifically, it expresses the fluid's change in speed, known as its velocity gradient. Being able to calculate shear rate is useful because it will allow you to predict the behavior of a fluid more precisely. It also helps you make more informed decisions regarding the best type of channel to use in construction projects.

Determine the velocity of the fluid. This is the speed at which the fluid is flowing through the channel. The measurement should be taken in meters per second.

Determine the height of the channel. This is the distance between the two interior sides of the channel's top and bottom plate.

Divide the velocity by the height. The result is the shear rate. For example, if you had a velocity of 6 meters per second and a height of 2 meters, divide 6 by 2 to get a shear rate of 3 meters per second.

About the Author

Soren Bagley recently graduated from the University of Toledo with a B.A. in English Literature. He has been a professional writer for two years and his work has appeared on a wide variety of internet web sites, including Associated and