کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
595746 1454024 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Viscous froth model for a bubble staircase structure under rapid applied shear: An analysis of fast flowing foam
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Viscous froth model for a bubble staircase structure under rapid applied shear: An analysis of fast flowing foam
چکیده انگلیسی

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 dimensionless measure of shear rate) separates a regime where film lengths are periodic functions of imposed strain from a regime of secular growth.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 348, Issues 1–3, 20 September 2009, Pages 49–58
نویسندگان
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