STP PartitionedBox Model Documents

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Main Document

Ejs STP PartitionedBox Model 

written by Wolfgang Christian, Anne Cox, Harvey Gould, and Jan Tobochnik

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 program was created using Ejs (Easy Java Simulations). You can modify this program and see how it is designed if you have Ejs installed by right-clicking within the window and selecting Open Ejs Model from the pop-up menu. Ejs, a part of the Open Source Physics Project, is designed to make it easier to access, modify, and generate computer models. Information about Ejs is available at

Additional Open Source Physics programs for Statistical and Thermal Physics can be found by searching ComPADRE for Open Source Physics, STP or Statistical and Thermal Physics.

Published May 30, 2008
Last Modified June 12, 2014

This file has previous versions.

Supplemental Documents (2)

Ejs STP PartitionedBox Documentation 

A pdf document that briefly describes the Partitioned Box program. It describes how to use the ejs_stp_PartitionedBox.jar file and contains short tutorial exercises for use with the ejs_stp_PartitionedBox.jar file.

Published May 30, 2008
Last Modified May 30, 2008

Ejs STP PartitionedBox Distribution 

The materials distributed in this zip file are in support of the Partitioned Box model. This distribution contains the Ejs STP PartitionedBox program, documentation, and exercises.

Published May 30, 2008
Last Modified May 30, 2008

This file has previous versions.

Source Code Documents

Ejs STP PartitionedBox Model Source 

The source code zip archive contains an XML representation of the STP Partitioned Boc model. Unzip this archive in your EJS workspace to compile and run this model using EJS.

Published October 2, 2008
Last Modified April 12, 2010

This file has previous versions.