典型文献
Computational study of bubble coalescence/break-up behaviors and bubble size distribution in a 3-D pressurized bubbling gas-solid fluidized bed of Geldart A particles
文献摘要：
A computational study was carried out on bubble dynamic behaviors and bubble size distributions in a pressurized lab-scale gas-solid fluidized bed of Geldart A particles.High-resolution 3-D numerical simu-lations were performed using the two-fluid model based on the kinetic theory of granular flow.A fine-grid,which is in the range of 3-4 particle diameters,was utilized in order to capture bubble structures explicitly without breaking down the continuum assumption for the solid phase.A novel bubble tracking scheme was developed in combination with a 3-D detection and tracking algorithm(MS3DATA)and applied to detect the bubble statistics,such as bubble size,location in each time frame and relative posi-tion between two adjacent time frames,from numerical simulations.The spatial coordinates and corre-sponding void fraction data were sampled at 100 Hz for data analyzing.The bubble coalescence/break-up frequencies and the daughter bubble size distribution were evaluated by using the new bubble tracking algorithm.The results showed that the bubble size distributed non-uniformly over cross-sections in the bed.The equilibrium bubble diameter due to bubble break-up and coalescence dynamics can be obtained,and the bubble rise velocity follows Davidson's correlation closely.Good agreements were obtained between the computed results and that predicted by using the bubble break-up model proposed in our previous work.The computational bubble tracking method showed the potential of analyzing bubble motions and the coalescence and break-up characteristics based on time series data sets of void fraction maps obtained numerically and experimentally.
文献关键词：
中图分类号：
作者姓名：
Teng Wang;Zihong Xia;Caixia Chen
作者机构：
Department of Energy and Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China
文献出处：
引用格式：
[1]Teng Wang;Zihong Xia;Caixia Chen-.Computational study of bubble coalescence/break-up behaviors and bubble size distribution in a 3-D pressurized bubbling gas-solid fluidized bed of Geldart A particles)[J].中国化学工程学报（英文版）,2022(04):485-496
A类：
MS3DATA
B类：
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AB值：
0.483477
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