Lennard-Jones PVT System Model
License: GPL |
Category: Math
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Publisher: Wolfgang-Christian
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Size: 43 KB
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Last Updated: 2013-07-11 |
Operating System: Mac OS X |
Price: FREE
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Publisher's description - Lennard-Jones PVT System Model
Lennard-Jones PVT System Model is a simple simulation that displays a two-dimensional system of particles confined between a thermal reservoir and a piston.
This computer model is designed to study the equation of state for particles interacting via a simple but realistic molecular potential that has a weak long-range attraction and a strong short range repulsion.
Slow-moving particles are color-coded as blue and fast particles are color-coded as yellow.
Users can set the initial particle energy, the initial particle separation, and the thermal reservoir temperature Tr.
The thermal conductivity parameter ? determines the probability that a collision with the thermal wall will affect (thermalize) the colliding particle.
If the conductivity is one, the particle velocity after a reservoir collision is set according to Maxwell-Boltzmann statistics.
If the conductivity is zero, all reservoir collisions are elastic and the total internal energy E of the system is conserved. The piston input fields in the bottom panel are used to compress and expand the system.
Users can approximate an adiabatic compression by setting ?=0 and can approximate an isothermal compression by setting ?=1.
The piston speed must, of course, be small to insure that the system remains in equilibrium during the compression for a (quasi-static approximation) reversible process. Separate windows allow users to follow the change in state of the system on a PV plot or a time evolution plot. Requirements:
· Java 1.5 or later
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