Applicability of the standard k-ε turbulence model to the dynamic simulation of bubble columns.: Part II:: Comparison of detailed experiments and flow simulations

被引:85
作者
Borchers, O [1 ]
Busch, C [1 ]
Sokolichin, A [1 ]
Eigenberger, G [1 ]
机构
[1] Univ Stuttgart, Inst Chem Verfahrenstech, D-70199 Stuttgart, Germany
关键词
bubble column; LDA; two-phase flow; hydrodynamics (Sokolichin and Eigenberger; chemical Engineering Science; (1999) in press);
D O I
10.1016/S0009-2509(99)00181-5
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Gas-liquid bubble-flow was studied in a flat bubble column with rectangular cross-section. The bubble column was locally aerated through a frit sparger, located in the central part of the bottom plate. The experimental techniques used comprise photographic documentation of the bubble distribution as well as LDA measurements of the liquid velocity. The influence of the liquid level (aspect ratio) in the bubble column and of the gas through-put on the hydrodynamic behaviour of the column has been investigated. Al aspect ratio of 1 steady state flow was observed with one circulation cell spread over the full width of the column. This differs from the flow behaviour in a uniformly aerated flat bubble column, reported by Chen, Jamialahmadi and Li (Chemical Engineering Research and Development 67 (1989) 203-207), who observed an essentially symmetric flow field with two stationary circulation cells. At aspect ratios of 2 and 3 the two-phase flow has a transient character with two staggered rows of vortices moving downwards in a periodic way. The long-time averaged liquid velocities obtained from the LDA measurements showed a symmetrical flow field, which is referred to in the literature as the "Gulf-stream" or "cooling-tower" pattern. The experimental results were compared with numerical simulations based upon the dynamic turbulent three-dimensional two-phase Euler-Euler model presented in Part I(Sokolichin and Eigenberger, Chemical Engineering. Since (1999) in press). (Good qualitative and quantitative agreement was found for the steady state as well as for the transient case. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:5927 / 5935
页数:9
相关论文
共 10 条
  • [1] Gas-liquid flow in bubble columns and loop reactors: Part II. Comparison of detailed experiments and flow simulations
    Becker, S.
    Sokolichin, A.
    Eigenberger, G.
    [J]. CHEMICAL ENGINEERING SCIENCE, 1994, 49 (24B) : 5747 - 5762
  • [2] BECKER S, 1997, EXPT UNTERSUCHUNGEN, V3
  • [3] LASER-DOPPLER MEASUREMENTS OF BUBBLE DYNAMICS
    BRANKOVIC, A
    CURRIE, IG
    MARTIN, WW
    [J]. PHYSICS OF FLUIDS, 1984, 27 (02) : 348 - 355
  • [4] CHEN JJJ, 1989, CHEM ENG RES DES, V67, P203
  • [5] Durst F., 1975, PROC LDA S COPENHAGE, P403
  • [6] VELOCITY-MEASUREMENTS IN 2-PHASE BUBBLE-FLOW REGIME WITH LASER-DOPPLER ANEMOMETRY
    MAHALINGAM, R
    LIMAYE, RS
    BRINK, JA
    [J]. AICHE JOURNAL, 1976, 22 (06) : 1152 - 1155
  • [7] CHARACTERISTICS OF LASER-DOPPLER SIGNALS FROM BUBBLES
    MARTIN, WW
    ADBELMESSIH, AH
    LISKA, JJ
    DURST, F
    [J]. INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, 1981, 7 (04) : 439 - 460
  • [8] Ohba K., 1976, Technology Reports of the Osaka University, V26, P547
  • [9] SOKOLICHIN A, 1999, IN PRESS CHEM ENG SC
  • [10] LASER-DOPPLER MEASUREMENT OF THE VELOCITY AND DIAMETER OF BUBBLES USING THE TRIPLE-PEAK TECHNIQUE
    YU, PYW
    VARTY, RL
    [J]. INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, 1988, 14 (06) : 765 - 776