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Frictional Forces in Thin Liquid Films

Published online by Cambridge University Press:  15 February 2011

Michael Urbakh ,
Joseph Klafter  and
Leonid Daikhin
Michael Urbakh
Affiliation:
School of Chemistry, Tel-Aviv University, Tel Aviv 69978, Israel
Joseph Klafter
Affiliation:
School of Chemistry, Tel-Aviv University, Tel Aviv 69978, Israel
Leonid Daikhin
Affiliation:
School of Chemistry, Tel-Aviv University, Tel Aviv 69978, Israel
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Abstract

Shear thinning of confined liquids is studied in the framework of the time dependent Ginzburg-Landau equation coupled to a shear-induced velocity field. Scaling relationship between the effective viscosity and the shear rate is analytically derived with an exponent which depends on the velocity profile within the liquid and on the boundary conditions. The velocity profile is derived in the limit of low shear rate. Thinning is observed for shear rates faster than typical liquid relaxation rates. Relevance to existing systems and predictions amenable to new experiments are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 366: Symposium N – Dynamics in Small Confining Systems , 1994 , 129
Copyright
Copyright © Materials Research Society 1995

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