XGAS(1)XGAS(1)NAMExgas - animated simulation of an ideal gas
SYNOPSISxgas [-option ...]
DESCRIPTIONxgas is a physical simulation of an ideal gas in a heated box. Gas
molecules move around the box with velocities dependent on their tem‐
perature. A chamber consisting of two boxes contains the gas mole‐
cules; the temperature of each box can be independently controlled by a
scrollbar. When gas molecules collide with the walls, their tempera‐
ture approaches that of the box.
Use mouse button 1 to create molecules one at a time at the cursor
position. Use mouse button 2 to create the maximum number of molecules
at the cursor position.
OPTIONS
This is a toolkit program;
all the usual toolkit options are available.
X DEFAULTS
The xgas program uses the following X resources:
timeStepSize
Specifies the simulated time duration in microseconds for each
cycle of computation.
delay Specifies the real time interval between timestep computations.
randomBounce
In each wall collision, a molecule bounces elastically (angle
of incidence = angle of reflection). A component of randomness
is added to this angle. RandomBounce varies from 0.0 (no ran‐
domness) to 1.0 (completely random angle of incidence).
equilibrium
During each wall collision, a molecule's kinetic energy
approaches that corresponding to the temperature of the wall.
If equilibrium is 1.0, the molecule reaches the wall tempera‐
ture immediately. For values between 1.0 and 0.0, the molecule
approaches the temperature of the wall more slowly.
maxMolecules
Specifies the maximum number of molecules in the simulation.
SEE ALSOX(1), xwd(1)BUGS
When the chamber is resized, molecules should be rearranged appropri‐
ately. Instead, the molecule arrays are reinitialized.
COPYRIGHT
Copyright 1991, Massachusetts Institute of Technology.
AUTHOR
Larry Medwin
X Version 11 Release 5 XGAS(1)
