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Chemical and Biochemical Engineering Quarterly, Vol. 25 No. 1, 2011.

Original scientific paper

Fluid Flow Modeling of a Gas-induced Pulsating Flow Bubble Column

X. Jia ; aDepartment of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China; bKey Laboratory of Systems Bioengineering (Tianjin University), Ministry of Education, Tianjin 300072, P. R. China
Q. Yuan ; Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China
J. Wen ; aDepartment of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China; bKey Laboratory of Systems Bioengineering (Tianjin University), Ministry of Education, Tianjin 300072, P. R. China
W. Feng ; Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China

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Abstract

A three-dimensional (3D) Euler-Euler gas-liquid two-phase mathematical model was developed for simulating the local transient fluid flow in a gas-induced pulsating flow bubble column using computational fluid dynamic (CFD) method, with multiple size group (MUSIG) model implemented to predict the bubble size distribution. Model simulated results such as local transient axial liquid velocities and time-averaged liquid turbulent kinetic energy distributions were validated successfully by corresponding experimental measurements under varied operating conditions, i.e. pulsating amplitudes
and frequencies. It was found that the liquid turbulent kinetic energy increased with the increase in pulsating amplitude and frequency, and a maximum value appeared at an axial position of Z = 0.4 m, centerline of the column. Furthermore, local transient fluid flow characters such as the gas holdups, gas velocity fields and liquid velocity fields, as well as bubble size distributions were predicted reasonably by the proposed model.

Keywords

Bubble column; gas-induced pulsating flow; fluid flow; bubble size distribution; CFD; MUSIG model

Hrčak ID:

66104

URI

https://hrcak.srce.hr/66104

Publication date:

1.4.2011.

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