Discrete Element Simulation of Collision-Rich Dynamics of Wet Granular Flows Down an Inclined Channel

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• 作者：Wei-Tze Chang ; Shang-Hsien Hsieh ; Fu-Ling Yang ; Chuin-Shan Chen
• 关键词：discrete element method ; wet granular flow ; contact model ; interaction model
• 刊名：Tsinghua Science Technology
• 出版年：2008
• 出版时间：October 2008
• 年：2008
• 卷：13
• 期：Supplement 1
• 页码：90-95
• 全文大小：473 K

文摘

This paper proposes a numerical scheme that employs the discrete element method (DEM) to simulate the motion of a wet granular flow down an inclined channel. To account for the liquid influences on the dynamics between paired particles, this paper presents a wet soft-sphere contact model with liquid-modified parameters. The developed scheme takes full advantage of DEM and avoids the expensive simulation of the solid-liquid interactions with conventional Navier-Stokes equation solver. This wet contact model has been implemented in an in-housed parallel discrete objects simulation system — KNIGHT and ANNE/IRIS — to compute the dynamic behaviors of both dry and wet granular particles flowing down an inclined channel.