Strathprints Home | Open Access | Browse | Search | User area | Copyright | Help | Library Home | SUPrimo

Viscous froth model for a bubble staircase structure under rapid applied shear: An analysis of fast flowing foam

Green, T.E. and Grassia, P. and Lue, L. and Embley, B. (2009) Viscous froth model for a bubble staircase structure under rapid applied shear: An analysis of fast flowing foam. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 348 (1-3). pp. 49-58. ISSN 0927-7757

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

The viscous froth model is applied to the rapid shear of '2-dimensional', dry foams for bubbles confined in a monolayer and arranged in an ordered staircase configuration that forms part of a hexagonal honeycomb Structure. High system energies are attained as particular films in the staircase become highly elongated under shear. Topological transformations during which bubbles exchange neighbours can relax the staircase energy, but their onset is postponed at high shear rates. Moreover as the imposed shear rate increases, the rate at which topological transformations subsequently occur cannot keep pace with the imposed shear, and secular film stretching onsets. A critical capillary number (a dimension less measure of shear rate) separates a regime where film lengths are periodic functions of imposed strain from a regime of secular growth.

Item type: Article
ID code: 27933
Keywords: 2-Dimensional foam, foam shear flow, shear-induced breakdown, viscous froth model, mathematical modelling, Physics
Subjects: Science > Physics
Department: Faculty of Engineering > Chemical and Process Engineering
Related URLs:
    Depositing user: Dr Leo Lue
    Date Deposited: 08 May 2011 13:50
    Last modified: 12 Mar 2012 11:20
    URI: http://strathprints.strath.ac.uk/id/eprint/27933

    Actions (login required)

    View Item