TY - JOUR
T1 - Flow of thin films on patterned surfaces
AU - Kondic, L.
AU - Diez, J.
N1 - Funding Information:
J. Diez acknowledges Fullbright Foundation, NJIT, and Consejo Nacional de Investigaciones Cientı́ficas y Técnicas (CONICET-Argentina) for supporting his visit to NJIT, and L. Kondic support from NSF grant No. INT-0122911 and NJIT grant No. 421210.
PY - 2003/3/12
Y1 - 2003/3/12
N2 - We present fully nonlinear time-dependent simulations of the gravity driven flow of thin wetting liquid films. The computations of the flow down a homogeneous substrate show that the contact line where liquid, solid, and gas phase meet becomes unstable and develops patterns. These computations are extended to inhomogeneous surfaces, and show that inhomogeneity can induce instability of the fluid front. In particular, we analyze flow on patterned surfaces, where surface inhomogeneity is introduced in a controllable manner. We discuss the conditions that need to be satisfied so that surface patterns, lead to predictable selective wetting of the substrate. Applications of these results to technologically relevant flows are discussed.
AB - We present fully nonlinear time-dependent simulations of the gravity driven flow of thin wetting liquid films. The computations of the flow down a homogeneous substrate show that the contact line where liquid, solid, and gas phase meet becomes unstable and develops patterns. These computations are extended to inhomogeneous surfaces, and show that inhomogeneity can induce instability of the fluid front. In particular, we analyze flow on patterned surfaces, where surface inhomogeneity is introduced in a controllable manner. We discuss the conditions that need to be satisfied so that surface patterns, lead to predictable selective wetting of the substrate. Applications of these results to technologically relevant flows are discussed.
KW - Instability
KW - Patterned surfaces
KW - Thin fluid films
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U2 - 10.1016/S0927-7757(02)00387-4
DO - 10.1016/S0927-7757(02)00387-4
M3 - Article
AN - SCOPUS:0037433469
SN - 0927-7757
VL - 214
SP - 1
EP - 11
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
IS - 1-3
ER -