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International Heat Transfer Conference 12

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

Numerical Study of Conjugate Steady Viscous Flow About and Inside a Spherical Bubble

Huanxin Lai
School of Engineering, The Nottingham Trent University, Nottingham NG1 4BU, UK; School of Engineering Sciences University of Southampton Southampton, S017 1BJ, United Kingdom

Yuying Yan
Research Centre for Fluids and Thermal Engineering, University of Nottingham Ningbo China, Ningbo, 315100, China; Fluids & Thermal Engineering Research Group, Faculty of Engineering, University of Nottingham, Nottingham, NG7 2RD, UK

C. R. Gentle
School of Engineering, The Nottingham Trent University, Nottingham NG1 4BU, UK

J.M. Smith
Department of Chemical and Process Engineering University of Surrey Guildford Surrey GU2 7XH United Kingdom.

DOI: 10.1615/IHTC12.2430
6 pages

Abstrakt

This paper presents a numerical study of conjugate viscous flows about and inside a spherical gas bubble. A calculating procedure in terms of primitive variables is proposed to replace the widely used stream functionvorticity methods. A multi-blockiteration strategy incorporated with a non-orthogonal mesh and high-order discretisation schemes is employed in the flow solver. Well-posed boundary conditions and their corresponding treatments for the interface are presented. Numerical simulations are carried out for the steady conjugate viscous flows about and inside a spherical air bubble rising in unbounded quiescent water, with exterior Reynolds number varies from 10 to 550. The flow structure behind a spherical bubble is found being drastically different from that of a liquid drop. No flow separation is observed when the exterior Reynolds number varies in the above range.

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