Experimental perturbations to Saffman-Taylor flow

KV McCloud, JV Maher - Physics Reports, 1995 - Elsevier
Patterns found at driven interfaces add richness and beauty to the visual world, but they
build processing-history-dependent inhomogeneities into samples of materials whose …

Pattern selection in fingered growth phenomena

DA Kessler, J Koplik, H Levine - Advances in physics, 1988 - Taylor & Francis
A variety of non-equilibrium growth processes are characterized by phase boundaries
consisting of moving fingers, often with interesting secondary structures such as …

Pattern selection in two-dimensional dendritic growth

EA Brener, VI Mel'Nikov - Advances in Physics, 1991 - Taylor & Francis
We present an analytical treatment of the problem of pattern selection in a fully non-local
symmetrical model of dendritic crystal growth. Simplifications of mathematical equations are …

A numerical analysis of dendritic and cellular array growth: the spacing adjustment mechanisms

SZ Lu, JD Hunt - Journal of Crystal Growth, 1992 - Elsevier
A numerical model has been used to describe the steady and the non-steady growth of array
cells and dendrites in a moving linear temperature field. It was found that the four parameter …

Surprises in viscous fingering

S Tanveer - Journal of Fluid Mechanics, 2000 - cambridge.org
In this paper, we review some aspects of viscous fingering in a Hele-Shaw cell that at first
sight appear to defy intuition. These include singular effects of surface tension relative to the …

Viscous finger widening with surfactants and polymers

D Bonn, H Kellay, MB Amar, J Meunier - Physical review letters, 1995 - APS
We study the viscous fingering instability which results from a competition between capillary
and viscous forces. We show that for two different systems the instability is modified …

Viscous fingering in complex fluids

D Bonn, H Kellay, M Bräunlich, MB Amar… - Physica A: Statistical …, 1995 - Elsevier
Viscous fingers form when in a thin linear channel a fluid pushes a more viscous fluid. The
instability of the interface results from a competition between viscous and capillary forces …

Effects of surface energy and kinetics on the growth of needle-like dendrites

EA Brener - Journal of crystal growth, 1990 - Elsevier
In the framework of the exact nonlocal thermal conductivity problem, the effect of anisotropy
both of surface energy and kinetics on the selection of velocity and direction of two …

Perturbing Hele-Shaw flow with a small gap gradient

H Zhao, J Casademunt, C Yeung, JV Maher - Physical Review A, 1992 - APS
A controlled perturbation is introduced into the Saffman-Taylor flow problem by adding a
gradient to the gap of a Hele-Shaw cell. The stability of the single-finger steady state was …

Pushing a non-Newtonian fluid in a Hele-Shaw cell: From fingers to needles

M Ben Amar, E Corvera Poiré - Physics of fluids, 1999 - pubs.aip.org
We make a theoretical study of the finger behavior of a simple fluid displacing a non-
Newtonian fluid confined in a Hele–Shaw cell. We study the Saffman–Taylor instability when …