CIESC Journal ›› 2022, Vol. 73 ›› Issue (6): 2636-2648.DOI: 10.11949/0438-1157.20220158
• Fluid dynamics and transport phenomena • Previous Articles Next Articles
Tianqi TANG1,2(),Yurong HE1,2()
Received:
2022-02-07
Revised:
2022-05-08
Online:
2022-06-30
Published:
2022-06-05
Contact:
Yurong HE
通讯作者:
何玉荣
作者简介:
唐天琪(1993—),女,博士,讲师,基金资助:
CLC Number:
Tianqi TANG, Yurong HE. Effect of magnetic field on the mesoscale structure evolution process in a wet particle fluidized bed[J]. CIESC Journal, 2022, 73(6): 2636-2648.
唐天琪, 何玉荣. 磁场对湿颗粒流化床系统中介尺度结构影响机制研究[J]. 化工学报, 2022, 73(6): 2636-2648.
变量 | 数值 | 单位 | 变量 | 数值 | 单位 |
---|---|---|---|---|---|
流化床 | 气体 | ||||
鼓泡床x、y、z方向尺寸 | 90×24×900 | mm | 气体密度 | 1.2 | kg/m3 |
鼓泡床x、y、z方向网格 | 10×3×90 | 气体速度 | 1.2 | m/s | |
颗粒 | 气体黏度 | 1.8×10-5 | Pa?s | ||
颗粒数量 | 16000 | 个 | 出口压力 | 101325 | Pa |
颗粒直径 | 3 | mm | 液体 | ||
颗粒密度 | 420 | kg/m3 | 相对液体量 | 0.01 | % |
恢复系数 | 0.97 | 液体密度 | 1000 | kg/m3 | |
颗粒间滑动摩擦系数 | 0.10 | 液体黏度 | 1.03 | mPa?s | |
颗粒壁面间滑动摩擦系数 | 0.30 | 接触角 | π/6 | rad | |
法向弹簧刚度 | 800 | N/m | 表面张力系数 | 0.0721 | N/m |
切向弹簧刚度 | 286 | N/m | 磁场 | ||
颗粒磁化率 | 0.642 | 磁场强度 | 0.005,0.010,0.020 | T |
Table 1 Parameters used in the simulation
变量 | 数值 | 单位 | 变量 | 数值 | 单位 |
---|---|---|---|---|---|
流化床 | 气体 | ||||
鼓泡床x、y、z方向尺寸 | 90×24×900 | mm | 气体密度 | 1.2 | kg/m3 |
鼓泡床x、y、z方向网格 | 10×3×90 | 气体速度 | 1.2 | m/s | |
颗粒 | 气体黏度 | 1.8×10-5 | Pa?s | ||
颗粒数量 | 16000 | 个 | 出口压力 | 101325 | Pa |
颗粒直径 | 3 | mm | 液体 | ||
颗粒密度 | 420 | kg/m3 | 相对液体量 | 0.01 | % |
恢复系数 | 0.97 | 液体密度 | 1000 | kg/m3 | |
颗粒间滑动摩擦系数 | 0.10 | 液体黏度 | 1.03 | mPa?s | |
颗粒壁面间滑动摩擦系数 | 0.30 | 接触角 | π/6 | rad | |
法向弹簧刚度 | 800 | N/m | 表面张力系数 | 0.0721 | N/m |
切向弹簧刚度 | 286 | N/m | 磁场 | ||
颗粒磁化率 | 0.642 | 磁场强度 | 0.005,0.010,0.020 | T |
Fig.10 Interaction among magnetic field force, contact force, drag force and liquid bridge force for the bubble structure evolution process under different magnetic field intensities in vertical direction
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