Abstract
| Language | English |
|---|---|
| Pages | 49-58 |
| Number of pages | 10 |
| Journal | Colloids and Surfaces A: Physicochemical and Engineering Aspects |
| Volume | 348 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - 20 Sep 2009 |
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Keywords
- 2-Dimensional foam
- foam shear flow
- shear-induced breakdown
- viscous froth model
- mathematical modelling
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Viscous froth model for a bubble staircase structure under rapid applied shear : an analysis of fast flowing foam. / Green, T. E.; Grassia, P.; Lue, L.; Embley, B.
In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 348, No. 1-3, 20.09.2009, p. 49-58.Research output: Contribution to journal › Article
TY - JOUR
T1 - Viscous froth model for a bubble staircase structure under rapid applied shear
T2 - Colloids and Surfaces A: Physicochemical and Engineering Aspects
AU - Green, T. E.
AU - Grassia, P.
AU - Lue, L.
AU - Embley, B.
PY - 2009/9/20
Y1 - 2009/9/20
N2 - 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.
AB - 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.
KW - 2-Dimensional foam
KW - foam shear flow
KW - shear-induced breakdown
KW - viscous froth model
KW - mathematical modelling
U2 - 10.1016/j.colsurfa.2009.06.028
DO - 10.1016/j.colsurfa.2009.06.028
M3 - Article
VL - 348
SP - 49
EP - 58
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
SN - 0927-7757
IS - 1-3
ER -