Effects of interface deformation on flow through microtubes containing superhydrophobic surfaces with longitudinal ribs and grooves

被引：23

作者：

Wang, L. P. ^{[1
]}

Teo, C. J. ^{[1
]}

Khoo, B. C. ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore

来源：

MICROFLUIDICS AND NANOFLUIDICS | 2014年 / 16卷 / 1-2期

基金：

英国科研创新办公室;

关键词：

Superhydrophobic; Microtubes; Interface curvature; Microfluidics; Effective slip; Drag reduction; DRAG REDUCTION; STOKES-FLOW; SLIP; MICROCHANNELS; WATER;

D O I：

10.1007/s10404-013-1201-1

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This paper presents analytical and numerical results for Poiseuille flow through microtubes patterned with superhydrophobic surfaces which consist of alternative ribs and grooves aligned longitudinally with the flow direction. The superhydrophobic surface prevents the flowing liquid from penetrating the grooves and the liquid-gas interface experiences deformation as a consequence of a pressure difference across the interface. Employing a domain perturbation technique, the effects of a small interface deformation on the effective slip behavior are analytically quantified. For large interface deformations, numerical studies are performed to predict the effects of interface protrusion on the effective slip behavior of the superhydrophobic microtube. Comparisons are made between the effective slip behavior for tube and channel flows patterned with superhydrophobic surfaces containing alternating longitudinal ribs and grooves.

引用

页码：225 / 236

页数：12

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