Hard Sphere Gas Model is a tiny ideal gas related simulation. Hard Sphere Gas model displays a three-dimensional (ideal) gas made out of hard disks. Particles are initialized with a random speed and in a random direction and move with constant velocity until a collision occurs. You can modify this simulation if you have Ejs installed by right-clicking within the plot and selecting "Open Ejs Model" from the pop-up menu item.

Hard Sphere Gas extends the Hard Disk model to three dimensions. Particles move with constant velocity until a collision event is detected. Although collision detection is not the most efficient computation algorithm for this problem, it is straightforward, accurate and fast-enough for small numbers of particles to show the physics that gives rise to a simple model of an inert monatomic gas.?The accumulate data averages the speed histogram over many time steps.

Requirements:
* Java

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