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Applied Physics Letters / Volume 94 / Issue 17 / STRUCTURAL, MECHANICAL, THERMODYNAMIC, AND OPTICAL PROPERTIES OF CONDENSED MATTER

Appl. Phys. Lett. 94, 171901 (2009); http://dx.doi.org/10.1063/1.3123804 (3 pages)

Corner liquid imbibition during capillary penetration in lithographically made microchannels

S. Girardo1, R. Cingolani1, S. Chibbaro2, F. Diotallevi3, S. Succi3, and D. Pisignano1,4

1NNL, National Nanotechnology Laboratory of INFM-CNR, Distretto Tecnologico, Università del Salento, via Arnesano, I-73100 Lecce, Italy
2Dipartimento di Fisica, University of Roma Tre, Via Vasca Navale 84 I-00146 Rome, Italy
3Istituto Applicazioni Calcolo, CNR, V.le del Policlinico 137, I-00161 Rome, Italy
4Scuola Superiore ISUFI, Università del Salento, via Arnesano, I-73100 Lecce, Italy

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(Received 11 December 2008; accepted 22 March 2009; published online 27 April 2009)

The authors investigate the formation of liquid layers at corners of lithographically made microchannels during capillary filling. The microflow and shape of the liquid-air interface is studied through an optically transparent microfluidic device. The experimental findings at early stages of layer formation are supported by three-dimensional lattice Boltzmann simulations, allowing to predict the shape and dynamics of the corner films and highlighting their dependence on the fluid contact angle.

© 2009 American Institute of Physics

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KEYWORDS and PACS

Keywords

capillarity, contact angle, flow simulation, lattice Boltzmann methods, liquid films, lithography, microchannel flow

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3123804

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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