Molecular Motion Demo - Brownian Motion
To model Brownian motion.
E.M.E. Molecular Motion Demonstrator with accessories as pictured.
A set of small balls of varying mass models the air. The balls are set into motion by vibration of the walls. A large mass models a smoke particle which is moved about randomly by collisions with the smaller air molecules. The device must be tilted so that the balls will not stop moving.
M. Husman, C. Schwieters, M. Littman, and H. Rabitz, Molecular-dynamics simulator for optimal control of molecular motion, AJP 59, 1012-1017 (1991).