Hydrodynamic behavior at the triple line of spreading liquids and the divergence problem

被引:18
作者
Carré, A [1 ]
Woehl, P [1 ]
机构
[1] Corning SA, Fontainebleau Res Ctr, F-77210 Avon, France
关键词
D O I
10.1021/la0117202
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A basic problem in spreading of a Newtonian liquid is the hydrodynamic description of the viscous energy dissipation near the moving contact line. With a sharp wedge profile, the braking force becomes infinite (divergence problem), implying that a drop is unable to spread on a solid surface, due to an infinite braking force. Introducing a "cutoff" length currently solves the problem, generating a finite value for the braking force. We propose an original approach to solve the divergence problem at a moving solid/liquid/ vapor triple line, exhibiting a fully explicit derivation for the viscous energy dissipation expression. It consists of observing that the rheological behavior of the liquid is modified near the triple line due to high shear rate. Above a critical value of the shear rate, near the triple line and near the solid surface, the liquid becomes shear-thinning, so that there is no divergence of the energy dissipation and viscous braking force. This description of the viscous braking phenomenon in liquid spreading is well supported by experiments of silicone oil spreading on glass substrates.
引用
收藏
页码:3600 / 3603
页数:4
相关论文
共 16 条
[1]  
ARKLES B, 1995, METAL ORGANICS INCLU, P397
[2]   The behaviour of liquid drops and adsorbed films at cleavage surfaces of mica. [J].
Bangham, DH ;
Saweris, Z .
TRANSACTIONS OF THE FARADAY SOCIETY, 1938, 34 (01) :0554-0569
[3]   KINETICS OF LIQUID/LIQUID DISPLACEMENT [J].
BLAKE, TD ;
HAYNES, JM .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1969, 30 (03) :421-&
[4]   DYNAMICS OF PARTIAL WETTING [J].
BROCHARDWYART, F ;
DEGENNES, PG .
ADVANCES IN COLLOID AND INTERFACE SCIENCE, 1992, 39 :1-11
[5]  
Carré A, 2000, LANGMUIR, V16, P2936, DOI 10.1021/1a991021d
[6]   Nonequilibrium molecular dynamics simulation of the rheology of linear and branched alkanes [J].
Cui, ST ;
Cummings, PT ;
Cochran, HD ;
Moore, JD ;
Gupta, SA .
INTERNATIONAL JOURNAL OF THERMOPHYSICS, 1998, 19 (02) :449-459
[7]   WETTING - STATICS AND DYNAMICS [J].
DEGENNES, PG .
REVIEWS OF MODERN PHYSICS, 1985, 57 (03) :827-863
[8]   MOTION OF A FLUID-FLUID INTERFACE ALONG A SOLID-SURFACE [J].
DUSSAN, EB ;
DAVIS, SH .
JOURNAL OF FLUID MECHANICS, 1974, 65 (AUG12) :71-&
[9]   The spreading of fluids on glass [J].
Hardy, WB .
PHILOSOPHICAL MAGAZINE, 1919, 38 (223) :49-55
[10]   MOVING FLUID INTERFACE .2. REMOVAL OF FORCE SINGULARITY BY A SLIP-FLOW [J].
HOCKING, LM .
JOURNAL OF FLUID MECHANICS, 1977, 79 (FEB22) :209-229