Open AccessOscillations of granular mixture gases with vertical vibration
Author(s) -
Yang Xian-Qing,
Liu Fu,
Jun Yan,
Min Deng,
Guo Hai-ping,
Tang Gang
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.1116
Subject(s) - oscillation (cell signaling) , radius , mechanics , container (type theory) , particle (ecology) , granular material , particle density , materials science , vibration , thermodynamics , physics , volume (thermodynamics) , composite material , chemistry , geology , biochemistry , computer security , oceanography , quantum mechanics , computer science
The oscillation phenomena for granular mixture within a vertically vibrated container are investigated with the event-driven method. The container consists of two rooms with equal size separated by a clapboard with certain heightand two kinds of granules with the radius of one twice as larger as the other are used. Investigation results indicate that the period of oscillation of granula sharply increases with the decrease of the ratio of density between two kinds of particles. The relations of the ratio of density to the ratio of vertical height of the two kinds of particles are calculated, which shows that the main factor of granular oscillation is not the “Brazil nut effect” or “reverse Brazile nut effect”. The granular temperature is calculated and found to be relevant to oscillations of mixture. When the temperature of the small particle is above a certain value, oscillations of granular mixture occur. According to hydromechanical equations proposed by Viridi et al., these equations are correspondly modified and may explain the relations between the period of oscillation and the ratio of granular density.