Abstract The granular materials involved in industrial moving beds vary widely, and the corresponding flow characteristics differ. This paper compares the flow characteristics of three kinds of typical granular materials, namely, glass beads, corundum beads, and coarse sand. The repose, internal friction, and particle-wall friction angles of these materials are measured, and the flow characteristics of these materials in near 2D silos, in moving beds with aligned pipes and staggered pipes are studied by particle image velocimetry (PIV). Detailed results regarding the vertical velocity distributions, horizontal velocity distributions, local velocity field surrounding pipes, and dimensionless tangential velocity distribution around pipes of the three granular materials are revealed and compared. The mass flow index of silos, the kinetic energy correction factor in certain cross sections and average dimensionless tangential velocities around pipes are calculated to reveal the similarities and differences of flow characteristics for different granular materials in moving beds.

中文翻译：

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近二维移动床中三种典型颗粒材料的流动特性

摘要 工业移动床涉及的粒状物料种类繁多，相应的流动特性也不同。本文比较了玻璃珠、刚玉珠、粗砂三种典型颗粒物料的流动特性。测量了这些材料的静止、内摩擦和颗粒壁摩擦角，并通过粒子图像测速 (PIV) 研究了这些材料在近二维筒仓、具有对齐管道和交错管道的移动床中的流动特性。揭示并比较了三种颗粒材料的垂直速度分布、水平速度分布、管道周围局部速度场和管道周围无量纲切向速度分布的详细结果。筒仓的质量流量指数，