Collisional viscosity of FCC particles in a CFB
Collisional viscosity of FCC particles in a CFB
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DOI：
10.1002/aic.690420910
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发表时间：
1996-09
期刊：
影响因子：
3.7
通讯作者：
D. Gidaspow;L. Huilin
中科院分区：
文献类型：
--
作者：
D. Gidaspow;L. Huilin
采用一种新的视频数字摄像技术，测量了循环流化床中75 μ m流化催化裂化（FCC）颗粒的速度分布。从粒子直方图的扩展，确定随机振荡粒子速度。利用颗粒流密相动力学理论，利用该随机速度来计算粉体的粘度。有很好的协议之间的动力学理论测量和以前的宏观粘度测量。无量纲组运动粘度除以振荡速度和颗粒直径相关的所有可用的数据作为颗粒体积分数的函数。
Particle velocity distributions were measured for a flow of 75-{micro}m FCC (fluidized catalytic cracking) particles in a CFB (circulating fluidized bed) using a new video-digital camera technique. From the spread of particle histograms, a random oscillating particle velocity was determined. This random velocity was used to compute the powder viscosity with the help of dense-phase kinetic theory of granular flow. There was excellent agreement between this kinetic-theory measurement and previous macroscopic viscosity measurements. The dimensionless group kinematic viscosity divided by the oscillating velocity and particle diameter correlated all available data as a function of particle volume fraction.