A model of breakup of a rising bubble in a turbulent flow

•A model of breakup of a bubble rising in a turbulent flow was developed.•Critical Weber number for a bubble, deformed due to rising, was evaluated.•Bubble dispersion in a turbulent horizontal pipe flow was simulated.•Results of CFD simulations of a pipe flow were compared with experimental data. Br...

Full description

Saved in:
Bibliographic Details
Published in:Chemical engineering science 2020-11, Vol.226, p.115846, Article 115846
Main Authors: Eskin, D., Meretskaya, E., Vikhansky, A.
Format: Article
Language:English
Subjects:
A-MuSiG
Bubble rising
CFD
Specific breakup rate
Turbulence
Weber number
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•A model of breakup of a bubble rising in a turbulent flow was developed.•Critical Weber number for a bubble, deformed due to rising, was evaluated.•Bubble dispersion in a turbulent horizontal pipe flow was simulated.•Results of CFD simulations of a pipe flow were compared with experimental data. Breakup of a bubble, rising under gravity in a turbulent flow, is analyzed. A model developed represents the critical Weber number of a bubble, indicating bubble breakup conditions, as a function of deformation caused by bubble rising. An ellipsoidal bubble shape is assumed. A simplified model of bubble deformation allows to obtain an analytical expression for the critical Weber number. An equation for the sepcific breakup rate of a rising bubble is also suggested and, then, validated against experimental data. The model developed is incorporated into the developer’s version of the adaptive multiple size-group (A-MuSiG) method of the Simcenter STAR-CCM+® CFD code. A good agreement of computed data vs. experimental results is demonstrated for a bubbly flow in a horizontal pipe without tuning any adjustable parameters.
ISSN:0009-2509
1873-4405
DOI:10.1016/j.ces.2020.115846