Empty site models for heap formation in vertically vibrating grains

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題名:	Empty site models for heap formation in vertically vibrating grains
作者:	Jia,LC;Lai,PY;Chan,CK
貢獻者:	物理研究所
關鍵詞:	GRANULAR BINARY MIXTURE;ROTATING DRUM;CONVECTION;SEGREGATION;INSTABILITY;PATTERNS;MOTION;GASES;BEDS
日期:	1999
上傳時間:	2010-07-08 14:01:57 (UTC+8)
出版者:	中央大學
摘要:	Heap formations of granular materials in a vertical vibrating bed are studied by a simulation model in which the effect of decrease in local density due to vibration is modeled by the creation of empty sites in the bulk. Dynamics of empty sites are introduced to simulate the bulk how while the surface flow is modeled by rules similar to the sandpile model. Phenomena such as heap formation and downward and upward convection modes can be reproduced. Phase diagrams similar to experimental observations can be constructed. A continuum model based on the empty site dynamics is also proposed. Predictions from the continuum model compare favorably with experimental observations.
關聯:	PHYSICAL REVIEW LETTERS
顯示於類別:	[物理研究所] 期刊論文

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