Two-dimensional gas simulation to help you with your studies. Hard Disk Gas model displays a two-dimensional gas made out of hard disks. Particles are initialized with a speed v=1 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 Disk Gas models a two-dimensional gas by extending the collision model to multiple particles. Particles are initialized with a speed v=1 in a random direction and move with constant velocity until a collision event is detected. Conservation of momentum and energy are applied and the simulation is resumed until the next 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.

Requirements:
* Java

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