Stability of viscous fingering patterns in liquid crystals

A. Buka, P. Palffy-Muhoray

Research output: Article

35 Citations (Scopus)

Abstract

We present experimental data of viscous fingering patterns in a radial Hele-Shaw cell filled with the liquid crystal 4,4-n-octylcyanobiphenyl (8CB). We observe a dense-branching-dendritic-dense-branching morphological phase sequence as a function of temperature. The wave number of the fastest growing mode can be selected by varying experimental parameters, and the number of initially growing fingers on a circular interface is in good agreement with linear-stability analysis which includes the full kinetic term. A mechanism is proposed for tip stabilization by anisotropic viscosity; the critical viscosity ratio for circular tips is 2.

Original languageEnglish
Pages (from-to)1527-1529
Number of pages3
JournalPhysical Review A
Volume36
Issue number3
DOIs
Publication statusPublished - jan. 1 1987

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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