Analyze macroscopic systems with this program. The Partitioned Box program displays the number of particles on one half of a box as a function of time after a small hole is made in the partition dividing the box in half. The purpose of this simulation is to gain insight into the tendency of macroscopic systems to approach a well defined equilibrium macrostate and the importance of fluctuations in equilibrium. The program is distributed as a ready-to-run (compiled) Java archive. Double-clicking the ejs_stp_PartitionedBox.jar file will run the program if Java is installed on your computer.

The purpose of this simulation is to gain insight into the tendency of macroscopic systems to approach a well defined equilibrium macrostate and the importance of fluctuations in equilibrium. The model shows the particles and plots the number of particles within the left hand side of the box and a histogram of this number.
References
H. Gould, J. Tobochnik, and W. Christian, An Introduction to Computer Simulation Methods: Applications to Physical Systems, Addison-Wesley (2007), Chapter 7.
H. Gould and J. Tobochnik Statistic and Thermal Physics p25 to be published by Princeton University Press (2010). Draft chapters are available online at <www.compadre.org/STP/>.
Wikipedia: en.wikipedia.org/wiki/Random_walk
Related Models
The following EJS models are described in Chapter 7 of the EJS adaptation of An Introduction to Computer Simulation Methods.
Partitioned Box
Binomial Distribution
Random Walk 1D
Random Walk 2D
Radioactive Decay Events

Requirements:
* Java

The license of this software is Freeware, you can free download and free use this graphing software.