Cited by 61Fluid Dynamics and MixingMinerals Flotation and Separation TechniquesGranular flow and fluidized beds

Mixing in Bubble Column Reactors: Role of Unsteady Flow Structures

Buwa, Vivek V., Ranade, Vivek V.·2003·The Canadian Journal of Chemical Engineering

Abstract

Abstract Gas‐liquid flows in bubble column reactors are inherently unsteady. In the present work, we have characterized dynamics of gas‐liquid flow in rectangular bubble columns and studied the role of unsteady flow structures in liquid phase mixing using experiments and CFD simulations. The need for considering the unsteady nature of gas‐liquid flows was demonstrated by using mixing simulations carried out with transient and time‐averaged flow. A new methodology of using a computationally amenable 'multiple snapshots' approach, which can adequately account for dynamics of underlying flow, is proposed. CFD simulations were carried out to study the influence of superficial gas velocity and height‐to‐width ratio on mixing time. The predictions were compared with mixing time measured using conductivity probes. The present work gives useful insights into the mixing process in inherently unsteady flows.

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Crossref · 10.1002/cjce.5450810310

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  • In pneumatically agitated photobioreactors, the cell motion is mainly governed by chaotic and non-regular vortices, and simulating such flows requires accurate modeling of turbulence and momentum transfer between the gas and liquid phases.

    “Here, the cell motion is mainly governed by chaotic and non-regular vortices [105,106], and simulating such flows requires the accurate modeling of turbulence and momentum transfer between the gas and liquid phases.”

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Authors
Buwa, V. V., & Ranade, V. V.
Affiliations
National Chemical Laboratory (IN)
Corresponding author
Ranade, Vivek V.
Venue
The Canadian Journal of Chemical Engineering
Publisher
Wiley
Published
2003-06
Volume
81
Issue
3-4
Pages
402-411
ISSN
  • 0008-4034 (ISSN-L)
  • 1939-019X
OpenAlex
W2006275796
Cited by
61
References
16
Citations by year
2023: 1 · 2022: 2 · 2021: 4 · 2020: 5 · 2019: 5 · 2018: 5 · 2017: 3 · 2016: 3 · 2015: 3 · 2014: 2 · 2013: 1 · 2012: 1
FWCI
1.58
Type
journal article
Language
en
Open access
closed
Locations
The Canadian Journal of Chemical Engineering (publishedVersion)
Funders
Department of Science and Technology, Ministry of Science and Technology, India
Topics
  • Physical Sciences › Engineering › Biomedical Engineering › Fluid Dynamics and Mixing
  • Physical Sciences › Environmental Science › Water Science and Technology › Minerals Flotation and Separation Techniques
  • Physical Sciences › Engineering › Computational Mechanics › Granular flow and fluidized beds
Keywords
bubble column, gas-liquid mixing, unsteady flow structures, mixing time, superficial gas velocity, height-to-width ratio, conductivity probe

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