Regime transition in bubble columns: experimental and predictions

Thorat, Bhaskar N.; Joshi, Jyeshtharaj B.

doi:10.1016/j.expthermflusci.2003.06.002

Cited by 102 publications

(67 citation statements)

References 10 publications

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“…(2) that the slope of the gas holdup versus the superficial gas velocity is greater than one (2.3709 in this work) and the line passes through the origin. That is also in agreement with the arguments of Thorat and Joshi (2004) in the ALR in the homogeneous regime. In addition, it is shown in Eq.…”

Section: Hydrodynamicssupporting

confidence: 81%

Aeration and mass transfer optimization in a rectangular airlift loop photobioreactor for the production of microalgae

Guo

Yao

Huang

2015

Bioresource Technology

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Section: Hydrodynamicssupporting

confidence: 81%

Aeration and mass transfer optimization in a rectangular airlift loop photobioreactor for the production of microalgae

Guo

Yao

Huang

2015

Bioresource Technology

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“…An early study was conducted by Zahradnik [43], demonstrating that, in perforated plates, the smaller the gas sparger opening, the more the homogeneous flow regime is stabilized. Sarrafi et al [29] found that the transition velocity decreases as d 0 increases, up to a value of d 0 = 0.0015 m. Thorat and Joshi [44] found that the homogeneous flow regime is stabilized with a decrease in d hole (d 0 = 0.0008-0.05 m). It is also worth noting that they observed that an increase in AR destabilized the homogeneous flow regime.…”

Section: Gas Sparger Designmentioning

confidence: 99%

Two-Phase Bubble Columns: A Comprehensive Review

2018

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We present a comprehensive literature review on the two-phase bubble column; in this review we deeply analyze the flow regimes, the flow regime transitions, the local and global fluid dynamics parameters, and the mass transfer phenomena. First, we discuss the flow regimes, the flow regime transitions, the local and global fluid dynamics parameters, and the mass transfer. We also discuss how the operating parameters (i.e., pressure, temperature, and gas and liquid flow rates), the operating modes (i.e., the co-current, the counter-current and the batch modes), the liquid and gas phase properties, and the design parameters (i.e., gas sparger design, column diameter and aspect ratio) influence the flow regime transitions and the fluid dynamics parameters. Secondly, we present the experimental techniques for studying the global and local fluid dynamic properties. Finally, we present the modeling approaches to study the global and local bubble column fluid dynamics, and we outline the major issues to be solved in future studies.

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“…[53,57] Also with increase in surface tension, the transition of bubbling regimes is delayed due to higher gas velocity, whereas the heterogeneous regime appears almost at the same gas velocity and the transition regime tends to disappear. [52,58] …”

Section: Effect Of Surface Tension On Mass Transfer Efficiency Of Bubmentioning

confidence: 98%

Efficiency of non‐reactive isothermal bubble column based on mass transfer

Majumder

2008

Asia-Pacific J Chem Eng

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Bubble column reactor as a gas-liquid contactor is extensively used in the chemical and biochemical industries. Mass transfer coefficients governing the transport processes in bubble contactors are a growing concern in chemical and biotechnological processes whose rates are often limited by the mass transfer rate. The influences of different physical, dynamic and geometric variables affect the efficiency characterization of the equipment which are involved in gas/liquid mass transfer processes. This characterization has great importance to optimize the process plant design. In this article, efficiency of two-phase mass transfer in bubble column reactors has been analyzed based on dynamic, geometric and physical variables of the system. An empirical correlation for mass transfer efficiency has also been developed in terms of those variables. The present analysis on the gas-liquid mass transfer efficiency of bubble column may give insight into a further understanding and modeling of multiphase reactors in industrial applications.

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Regime transition in bubble columns: experimental and predictions

Cited by 102 publications

References 10 publications

Aeration and mass transfer optimization in a rectangular airlift loop photobioreactor for the production of microalgae

Aeration and mass transfer optimization in a rectangular airlift loop photobioreactor for the production of microalgae

Two-Phase Bubble Columns: A Comprehensive Review

Efficiency of non‐reactive isothermal bubble column based on mass transfer

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