Computational approach for a pair of bubble coalescence process

Hasan, Nurul and Zakaria, Zalinawati (2011) Computational approach for a pair of bubble coalescence process. [Citation Index Journal]

[thumbnail of NH_Journal_of_Heat_and_Fluid_Flow.pdf] PDF
NH_Journal_of_Heat_and_Fluid_Flow.pdf - Accepted Version
Restricted to Registered users only until 3 December 2013.

Download (888kB) | Request a copy

Abstract

The coalescence of bubbles has great value in mineral recovery and oil industry. In this paper, two
co-axial bubbles rising in a cylinder is modelled to study the coalescence of bubbles for four computational
experimental test cases. The Reynolds’ (Re) number is chosen in between 8.50 and 10, Bond number,
Bo �4.25–50, Morton number, M 0.0125–14.7. The viscosity ratio (lr) and density ratio (qr) of liquid
to bubble are kept constant (100 and 850 respectively). It was found that the Bo number has significant
effect on the coalescence process for constant Re, lr and qr. The bubble–bubble distance over time was
validated against published experimental data. The results show that VOF approach can be used to model
these phenomena accurately. The surface tension was changed to alter the Bo and density of the fluids to
alter the Re and M, keeping the lr and qr the same. It was found that for lower Bo, the bubble coalesce is
slower and the pocket at the lower part of the leading bubble is less concave (towards downward) which
is supported by the experimental data.

Item Type: Citation Index Journal
Impact Factor: 1.498
Subjects: T Technology > TN Mining engineering. Metallurgy
Departments / MOR / COE: Departments > Chemical Engineering
Research Institutes > Institute for Contaminant Management
Research Institutes > Institute for Hydrocarbon Recovery
Research Institutes > Institute for Autonomous Systems
Depositing User: Dr. Nurul Hasan
Date Deposited: 07 Apr 2011 09:06
Last Modified: 19 Jan 2017 08:22
URI: http://scholars.utp.edu.my/id/eprint/5292

Actions (login required)

View Item
View Item