Sat, 26 Jul 2008 08:38:30 BST CiteULike: dchen Chan http://www.citeulike.org/user/dchen/author/Chan CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dchen/article/2547980 <i>Physical Review Letters, Vol. 100, No. 6. (2008)</i><br /><br />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. Temperature Oscillations in a Compartmentalized Bidisperse Granular Gas Meiying Hou Hongen Tu Rui Liu Yinchang Li Kunquan Lu Pik Lai CK Chan doi:10.1103/PhysRevLett.100.068001 Physical Review Letters, Vol. 100, No. 6. (2008) 2008-03-18T00:51:22-00:00 2008 Physical Review Letters 100 6 APS 2008 grain people