Particle pressures in gas-fluidized beds
Particle pressures in gas-fluidized beds
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DOI：
10.1017/s0022112091000216
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发表时间：
1991-06
影响因子：
3.7
通讯作者：
C. Campbell;David G. Wang
中科院分区：
文献类型：
--
作者：
C. Campbell;David G. Wang
粒子压力是由于粒子运动及其相互作用而施加的表面力。本文描述了施加在气体流化床侧壁上的颗粒压力的测量。只要床层保持充填状态，颗粒压力就会随着气速的增加而降低，因为越来越多的床层受到流体力的支撑。它适当地达到最小流化，然后在床层流化时又开始上升，反映了气泡对床层的搅拌。在这个完全流化的区域，颗粒压力随颗粒密度和气泡大小而变化。
The particle pressure is the surface force that is exerted due to the motion of particles and their interactions. This paper describes measurements of the particle pressure exerted on the sidewall of a gas-fluidized bed. As long as the bed remains in a packed state, the particle pressure decreases with increasing gas velocity as progressively more of the bed is supported by fluid forces. It appropriately reaches a minimum fluidization and then begins to rise again when the bed is fluidized, reflecting the agitation of the bed by bubbles. In this fully fluidized region, the particle pressure scales with the particle density and the bubble size.