Temperature Oscillations in a Compartmentalized Bidisperse Granular Gas

Abstract

A granular clock is observed in a vertically vibrated compartmentalized granular gas composed of two types of grains with the same size. The dynamics of the clock is studied in terms of an unstable evaporation or condensation model for the granular gas. In this model, the temperatures of the two types of grains are considered to be different, and they are functions of the composition of the gas. Oscillations in the system are driven by the asymmetric collisions properties between the two types of grains. Both our experiments and model show that the transition of the system from a homogeneous state to an oscillatory state is via a Hopf bifurcation.

Evidence for a new force in dissipative system derived from Boltzmann equation: Consequence for the mechanics of the material point, experimental evidences and possible applications

“…Maxwell Demon Effect in Granular Gas (MD_gg): Most experiments on MD_gg [21][22][23][24] have been understood using a model without dissipation. It is expected that a better understanding and better comparisons will be possible by introducing the correct distribution and phenomena.…”

Flux measurement in compartmentalized mono-disperse and bi-disperse granular gases

“…Special attentions are given to compartmentalized systems (as shown in Fig. 1a) in which many interesting clustering phenomena are observed [5][6][7][8][9][10][11][12][13][14][15][16][17][18]. A spontaneous symmetry-breaking phenomenon called "Maxwell demon" was first observed in a mono-disperse granular gas experimentally by Schlichting et al [5] and in simulation by Schinner [6].…”

Space experimental studies of microgravity fluid science in China

“…Recent progress also included the theoretical studies on the possible transport and maneuver of granular materials in microgravity using the so called "Maxwell's demon" effect [54] .…”

“…It tells us that the dissipative systems are multi-scale, and there exists phase transition. Further studies have been planned for phase transition in granular gas and transport of granular materials in microgravity [54][55][56][57][58][59] .…”

“…The microgravity research center of Germany designed a two-wavelength Mach-Zehnder interferometer for the International Space Station (ISS). We developed a Mach-Zehnder interferometer to observe and measure the mass transfer processes during the crystal growth on ground experiments [51][52][53][54][55] . The mass transfer process of a water droplet in EAFP protein solution under microgravity condition provided by the SJ-8 satellite was monitored for the first time by a specially designed Mach-Zehnder interferometer.…”