Education Prize Logo
Science SPORE Prize
November 2011

NSF Logo
The Open Source Physics Project is supported by NSF DUE-0442581.

Computer Program Detail Page

Item Picture
written by Fernando Silva Fernandes
The HS-WCA-LJ Monte Carlo Model performs simultaneous canonical Monte Carlo (MC) simulations of 108, 256 or 500 particles interacting through the hard sphere (HS), the Weeks, Chandler and Andersen (WCA) and the Lennard-Jones (LJ) pair potentials. It was inspired by the review of Chandler, Weeks and Anderson on WCA theory, illustrating that "the attractive interactions help fix the volume of the system, but the arrangements and motions of molecules within that volume are determined primarily by the local packing and steric effects produced by the repulsive forces". The radial distribution functions for the three systems are plotted after every MC cycle, at densities and temperatures chosen by the user, and the data Tables display thermodynamic results from the LJ and WCA potentials. The thermodynamics of the HS system was addressed to another application cataloged at Open Source Physics.
The objective of this application is: (i) to illustrate the canonical MC method with three different systems;(ii) to probe the densities and temperatures at which the HS and WCA potentials approach the structure(defined by the radial distribution functions) of the LJ system, regarding their use in perturbation theory.

The HS-WCA-LJ Monte Carlo Model was developed using the Easy Java Simulations (EJS) modeling tool.  It is distributed as a ready-to-run (compiled) Java archive.   Double clicking the jar file will run the program if Java is installed.  You can modify this simulation if you have EJS installed by right-clicking within the map and selecting "Open Ejs Model" from the pop-up menu item.

Please note that this resource requires at least version 1.6 of Java (JRE).
View the supplemental document attached to this resource
Subjects Levels Resource Types
Mathematical Tools
- Statistics
Thermo & Stat Mech
- First Law
= Equations of State
- Models
= Ideal Gas
= Lennard-Jones Potential
- Phase Transitions
- Graduate/Professional
- Upper Undergraduate
- Instructional Material
= Model
= Simulation
Intended Users Formats Ratings
- Educators
- Learners
- Researchers
- application/java
  • Currently 0.0/5

Want to rate this material?
Login here!

Access Rights:
Free access
This material is released under a GNU General Public License Version 3 license.
Rights Holder:
Fernando M.S. Silva Fernandes
Record Cloner:
Metadata instance created March 12, 2013 by Wolfgang Christian
Record Updated:
August 20, 2013 by Matt Mohorn
Last Update
when Cataloged:
March 12, 2013
ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
F. Fernandes, Computer Program HS-WCA-LJ MONTE CARLO MODEL (2013), WWW Document, (
F. Fernandes, Computer Program HS-WCA-LJ MONTE CARLO MODEL (2013), <>.
APA Format
Fernandes, F. (2013). HS-WCA-LJ Monte Carlo Model [Computer software]. Retrieved April 24, 2014, from
Chicago Format
Fernandes, Fernando Silva. "HS-WCA-LJ Monte Carlo Model." (accessed 24 April 2014).
MLA Format
Fernandes, Fernando Silva. HS-WCA-LJ Monte Carlo Model. Computer software. 2013. Java (JRE) 1.6. 24 Apr. 2014 <>.
BibTeX Export Format
@misc{ Author = "Fernando Silva Fernandes", Title = {HS-WCA-LJ Monte Carlo Model}, Month = {March}, Year = {2013} }
Refer Export Format

%A Fernando Silva Fernandes
%T HS-WCA-LJ Monte Carlo Model
%D March 12, 2013
%O application/java

EndNote Export Format

%0 Computer Program
%A Fernandes, Fernando Silva
%D March 12, 2013
%T HS-WCA-LJ Monte Carlo Model
%8 March 12, 2013

Disclaimer: ComPADRE offers citation styles as a guide only. We cannot offer interpretations about citations as this is an automated procedure. Please refer to the style manuals in the Citation Source Information area for clarifications.

Citation Source Information

The AIP Style presented is based on information from the AIP Style Manual.

The APA Style presented is based on information from APA Electronic References.

The Chicago Style presented is based on information from Examples of Chicago-Style Documentation.

The MLA Style presented is based on information from the MLA FAQ.

HS-WCA-LJ Monte Carlo Model:

Is Based On Easy Java Simulations Modeling and Authoring Tool

The Easy Java Simulations Modeling and Authoring Tool is needed to explore the computational model used in the HS-WCA-LJ Monte Carlo Model.

relation by Wolfgang Christian

Know of another related resource? Login to relate this resource to it.
Save to my folders


Related Materials

Similar Materials

The OSP Network:
Open Source Physics - Tracker - EJS Modeling
Physlet Physics
Physlet Quantum Physics