# Confined Lennard-Jones Two Piston System Model

The Confined Lennard-Jones Two Piston System simulates a constant-energy two-dimensional system of ... (more)

The Confined Lennard-Jones Two Piston System simulates a constant-energy two-dimensional system of particles confined by two frictionless pistons of equal mass M. This computer model complements theoretical work describing the adiabatic expansion of an ideal gas using the quasi-static approximation. Users can set the initial particle kinetic energy, Lennard Jones parameters, and the initial particle separation. Slow-moving particles are color-coded as blue and fast particles are color-coded as yellow. The time evolution of temperature, pressure, and piston speed are shown in a second window. Particles in this model have unit mass and interact through pairwise Lennard-Jones forces and hard-wall contact forces. The instantaneous temperature is computed using the average particle kinetic energy and the pressure is computed using the virial expansion. The Confined Lennard-Jones Two Piston System is a supplemental simulation for the article "<a href="http://dx.doi.org/10.1119/1.3428856">Evolution of ideal gas mixtures confined in an insulated container by two identical pistons</a>" by Joaquim Anacleto, Joaquim Alberto C. Anacleto, and J. M. Ferreira in the American Journal of Physics 79(10), 1009-1014 (2011) and has been approved by the authors and the American Journal of Physics (AJP) editor. The Confined Lennard-Jones Two Piston System was created using the Easy Java Simulations (Ejs) modeling tool. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the ejs_stp_md_ConfinedLennardJonesTwoPistonSystem.jar file will run the program if Java is installed. (less)

- Subject:
- Mathematics
- Engineering
- Physics
- Technology
- Material Type:
- Instructional Material
- Interactive
- Provider:
- ComPADRE Digital Library
- Provider Set:
- ComPADRE: Resources for Physics and Astronomy Education
- Author:
- Wolfgang Christian