Computational flow analysis of bubble formation dynamics in a liquid column subjected to high centrifugal force. (November 2019)

• Record Type: Journal Article
• Authors: Kumar, Veerendra; Singhal, Gaurav; Kumar Singh, Vinod; Srivastava, H. B.
• Is Part Of: IOP conference series. Volume 691(2019)
• Publication Date: 2019-11
• Subjects: Bubbling -- VOF -- CFD -- CBSOG; Materials science -- Periodicals; 620.1105
• DOI: 10.1088/1757-899X/691/1/012049
• Languages: English
• ISSNs: 1757-8981

Abstract

Abstract: Bubbling of gaseous medium in a liquid column is integral to many multiphase process reactors involving liquid phase and gas phase reactants. In one such reactor called centri-bubble singlet oxygen generator (CBSOG), chlorine gas is injected against a substantively high centrifugal force into a layer of basic hydrogen peroxide (BHP) solution. This process generates small bubbles that facilitate the reaction between chlorine gas and BHP solution at the gas liquid interface, resulting in the production of singlet oxygen. Performance of this device depends primarily on bubble formation time, its shape and size, and its interaction with other bubbles. This paper presents the numerical analysis of bubble formation at high centrifugal force (3800 m/s 2 ) for various gas flow rates at orifice sizes of 0.3mm and 0.5mm. The volume of fluid (VOF) model of the computational flow dynamics (CFD) solver Fluent has been used for the computations to carry out a transient 3-dimensional simulation for generation of bubbles in a laminar incompressible flow.