The one-particle distribution for the modulus of the velocity of a hard-disk fluid inside a small circular cavity is studied. Due to the geometry of the cavity, the total angular momentum L is conserved if the (elastic) particle–wall collisions are specular, leading to a new, special...

A simple approximate expression is proposed for the energy dependence of the microcanonical density of states of a classical hard-particle fluid column of infinite height in a uniform gravitational field. This expression is based on the exact result in one dimension and depends on an effective...

The microcanonical molecular dynamics ensemble describes a system with a fixed number of particles in a given volume and with constant total energy and total linear momentum. The primary phase integrals of this ensemble for a hard-core fluid are derived by using geometrical arguments. The...

The use of periodic boundary conditions in molecular-dynamics simulations leads to the microcanonical EVNMG ensemble of Ray and Zhang [J.R. Ray, H. Zhang, Phys. Rev. E 59 (1999) 4781] in which the total linear momentum M and the generator of infinitesimal Galilean boosts G are conserved...

A monolayer of spherical non-magnetic inclusions in a paramagnetic fluid is known to crystallize in the presence of a perpendicular magnetic field. It is shown, as a function of increasing layer thickness, that an initially stable 2D triangular monolayer becomes unstable with respect to a...