Corner liquid imbibition during capillary penetration in lithographically made microchannels

Girardo, S.; Cingolani, R.; Chibbaro, S.; Diotallevi, F.; Succi, S.; Pisignano, D.
April 2009
Applied Physics Letters;4/27/2009, Vol. 94 Issue 17, p171901
Academic Journal
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.


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