Rotational behavior of dry spheres obliquely impacting on liquid layers
Rotational behavior of dry spheres obliquely impacting on liquid layers
复制标题
干球倾斜撞击液层的旋转行为
DOI：
10.1016/j.powtec.2014.08.042
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发表时间：
2015
影响因子：
5.2
通讯作者：
Xiaoping Chen
中科院分区：
文献类型：
--
作者：
Jiliang Ma;Daoyin Liu;Xiaoping Chen
在工业流态化过程中，球体与液体的碰撞是很常见的。对其机理的详细了解有助于优化这些工艺。已经有一些关于能量耗散的恢复系数方面的研究。然而，关于球体碰撞后的转动特性的研究还很少。在这项工作中，进行了追踪氧化铝球斜撞击表面覆盖液层的实验。当球体在撞击后反弹时，可以观察到强烈的旋转。研究了切向速度、液体粘度和球层厚度对球角速度(ω)的影响。结果表明，ω随液层厚度和粘度的增大而减小，随切向速度的增大而增大。此外，利用修正的斯托克斯数(STN)分析了角速度与这些碰撞参数的定量关系。最后，计算了转动恢复系数(β)和摩擦系数(μf)这两个特征参数来区分接触过程中的滚动和滑动区域。
Sphere collision with the presence of liquid is common in industrial fluidization-based processes. A detailed understanding on its mechanics is helpful for optimizing these processes. There have been some studies regarding energy dissipation in terms of restitution coefficients. However, studies on rotational characteristics of spheres after impact are scarce. In this work, experiments are conducted to trace Al2O3spheres obliquely impacting on a surface covered by liquid layers. Strong rotation can be observed when the sphere rebounds after the impact. The effects of tangential velocity, liquid viscosity and layer thickness on the angular velocity of spheres (ω) were investigated. It is found thatωdecreases with increasing liquid layer thickness and viscosity, while increases with the tangential velocity. Furthermore, the quantitative relation of angular velocity to these impact parameters was analyzed by using a modified Stokes number (StN). Finally, two characteristic parameters, rotational restitution coefficient (β) and friction coefficient (μf), were calculated to distinguish rolling and sliding regions during contact.
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影响因子：
5.2
作者：
A. Kantak;Robert H. Davis
通讯作者：
A. Kantak;Robert H. Davis
影响因子：
3.7
作者：
G. Joseph;M. Hunt
通讯作者：
G. Joseph;M. Hunt
DOI：
10.1103/physreve.88.033018
发表时间：
2013-09
期刊：
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子：
--
作者：
Jiliang Ma;Daoyin Liu;Xiaoping Chen
通讯作者：
Jiliang Ma;Daoyin Liu;Xiaoping Chen
影响因子：
2
作者：
R. Zenit;M. Hunt
通讯作者：
R. Zenit;M. Hunt
影响因子：
3.7
作者：
C. Donahue;C. Hrenya;Robert H. Davis;K. Nakagawa;A. P. Zelinskaya;G. Joseph
通讯作者：
C. Donahue;C. Hrenya;Robert H. Davis;K. Nakagawa;A. P. Zelinskaya;G. Joseph