کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
613099 880714 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transport of wetting liquid plugs in bifurcating microfluidic channels
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Transport of wetting liquid plugs in bifurcating microfluidic channels
چکیده انگلیسی

A plug of wetting liquid is driven at constant pressure through a bifurcation in a microchannel. For a plug advancing in a straight channel, we find that the viscous dissipation in the bulk may be estimated using Poiseuille's law while Bretherton and Tanner's laws model the additional dissipation occurring at the rear and front interfaces. At a second stage, we focus on the behavior of the plug flowing through a T-junction. Experiments show the existence of a threshold pressure, below which the plug remains blocked at the entrance of the junction. Above this required pressure, the plug enters the bifurcation and either ruptures or splits into two daughter plugs, depending on the applied pressure and on the initial length of the plug. By means of geometrical arguments and the previously cited laws, we propose a global model to predict the transitions between the three observed behaviors.

The transport of wetting liquid plugs in straight and bifurcating microchannels is studied experimentally and theoretically. Three behaviors were observed at the bifurcation: blockage, rupture and splitting.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 308, Issue 1, 1 April 2007, Pages 231–238
نویسندگان
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