منابع مشابه
Flow transitions in two-dimensional foams.
For sufficiently slow rates of strain, flowing foam can exhibit inhomogeneous flows. The nature of these flows is an area of active study in both two-dimensional model foams and three dimensional foam. Recent work in three-dimensional foam has identified three distinct regimes of flow [S. Rodts, J. C. Baudez, and P. Coussot, Europhys. Lett. 69, 636 (2005)]. Two of these regimes are identified w...
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We probe the relation between rheology and shear-induced relaxation in experiments on two-dimensional foams at steady shear. The characteristic relaxation time tr, which we extract from the non-affine part of the bubble displacements, scales non-linearly with the local strain rate γ̇. In particular, the relative strength of the non-affine part grows when γ̇ → 0 —hence the foam flow is not quasist...
متن کاملScreening in two-dimensional foams
a Institute of Mathematics and Physics, Aberystwyth University, Ceredigion SY23 3BZ, United Kingdom, Email: [email protected] b Laboratoire de Spectrométrie Physique, UMR5588, CNRS-Université Grenoble I, B.P. 87, F-38402 Martin d’Hères Cedex, France c Instituto de Ciência e Engenharia de Materiais e Superficies and Departamento de Engenharia de Materiais, Instituto Superior Técnico, Avenida Rovi...
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a two dimensional finite difference lattice boltzmann method (fdlbm) for computing single phase flow problems is developed here. temporal term is discretized with low dissipation-low dispersion. discretization of convective term is implemented with third order upwind method. it will be explained governing equations and numerical method. methodology of imposing boundary conditions in fdlbm is de...
متن کاملThe rheology of two-dimensional foams
Why study the rheology of foams? The motivations are widespread and diverse (Weaire and Hutzler 1999). Foams are common in oil extraction and industrial cleaning. Closer to home, an understanding of flowing foams helps to extinguish fires more efficiently and to generate the perfect pint of beer. At low shear-rates a foam behaves as an elastic solid, while at high shearrates it yields like a li...
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ژورنال
عنوان ژورنال: EPL (Europhysics Letters)
سال: 2010
ISSN: 0295-5075,1286-4854
DOI: 10.1209/0295-5075/90/54002