T Torque on a Small Particle in a Nonhomogeneous Monatomic Gas

Open Access
Publisher Website
Google Scholar
Abstract
The torque a particle experiences in a monatomic gas in non-equilibrium is calculated with the method Waldmann originally used to compute the force. For a particle which is much smaller than the mean free path in the gas this method involves the following two essential steps: i) with the help of a boundary condition the torque is expressed by the velocity distribution function of the gas atoms approaching the particle; ii) this undisturbed distribution function is approximated by a moments-expansion, restricted here to thirteen moments. In the resulting expression for the torque the pressure tensor and the local vorticity in the gas occur. The geometrical factors are given for particles shaped as spheroids, cylinders and spherocylinders

This publication has 0 references indexed in Scilit: