Particle Image Velocimetry

Particle Image Velocimetry (PIV) is a experimental flow visualization technique that helps us determine instantaneous properties of fluid elements at any desired point in the flow. A camera setup is used to follow select tracer particles that help us visualize the Lagrangian-style flow of the fluid in question (rate for our case).  To build a PIV setup, we need:

1. A camera to record the fluid region of interest.
2. A laser to limit the region of interest.
3. Tracer Particles for there camera to identify and follow.
4. A PIV code to process the captured images.

A great first introduction to PIV has been included in the video linked below made by KYLE ENGINEERS.