CRITICAL-DYNAMICS OF CONTACT LINE DEPINNING

被引:144
作者
ERTAS, D
KARDAR, M
机构
[1] Department of Physics, Massachusetts Institute of Technology, Cambridge
关键词
D O I
10.1103/PhysRevE.49.R2532
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
The depinning of a contact line is studied as a dynamical critical phenomenon by a functional renormalization group technique. In D = 2 - epsilon interface dimensions, the roughness exponent is zeta = epsilon/3 to all orders in perturbation theory. Thus, zeta = 1/3 for the contact line, equal to the Imry-Ma estimate of Huse for the equilibrium roughness. The dynamical exponent is z = 1 - 2epsilon/g + O(epsilon2) < 1, resulting in unusual dynamical properties. In particular, a characteristic distortion length of the contact line depinning from a strong defect is predicted to initially increase faster than linearly in time. Some experiments are suggested to probe such dynamics.
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页码:R2532 / R2535
页数:4
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