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- W2139969247 abstract "Numerical simulations of the small bubble-big bubble-liquid three phase heterogeneous flowin a square cross-sectioned bubble column were carried out with the commercial CFDpackage CFX-4.4 to explore the effect of superficial velocity and inlet dispersed phasefractions on the flow patterns. The approach of Krishna et al. (2000) was adopted in theEuler-Euler framework to numerically simulate the gas-liquid heterogeneous flow in bubblecolumns. On basis of an earlier study (Zhang et al. 2005), the extended multiphase k - eturbulence model (Pfleger and Becker, 2001) was chosen to model the turbulent viscosity inthe liquid phase and implicitly account for the bubble-induced turbulence. The obtainedresults suggest that, first of all, the extended multiphase k - e turbulence model of Pfleger andBecker (2001) is capable of capturing the dynamics of the heterogeneous flow. Withincreasing superficial velocity, the dynamics of the flow, as well as the total gas hold-upincreases. It is observed that with increasing inlet phase fraction of the big bubbles, the totalgas holdup decreases while the dynamic nature of the flow increases, which indicates that thesmall bubble phase mainly determines the total gas holdup while the big bubble phasepredominantly agitates the liquid." @default.
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- W2139969247 date "2006-01-01" @default.
- W2139969247 modified "2023-09-25" @default.
- W2139969247 title "Numerical simulation of small bubble-big bubble-liquid three-phase flows" @default.
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