Title:
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Capillary filling at the microscale: Control of fluid front using geometry
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Author:
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Trejo-Soto, C.; Costa-Miracle, E.; Rodriguez-Villarreal, I.; Cid, J.; Alarcon, T.; Hernandez-Machado, A.
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Abstract:
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We propose an experimental and theoretical framework for the study of capillary filling at the micro-scale. Our methodology enables us to control the fluid flow regime so that we can characterise properties of Newtonian fluids such as their viscosity. In particular, we study a viscous, non-inertial, non-Washburn regime in which the position of the fluid front increases linearly with time for the whole duration of the experiment. The operating shear-rate range of our apparatus extends over nearly two orders of magnitude. Further, we analyse the advancement of a fluid front within a microcapillary in a system of two immiscible Newtonian liquids. We observe a non-Washburn regime in which the front can accelerate or decelerate depending on the viscosity contrast between the two liquids. We then propose a theoretical model which enables us to study and explain both non-Washburn regimes. Furthermore, our theoretical model allows us to put forward ways to control the emergence of these regimes by means of geometrical parameters of the experimental set-up. Our methodology allows us to design and calibrate a micro-viscosimetre which works at constant pressure. |
Publication date:
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2016-01-01 |
Subject (UDC):
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51 - Matemàtiques |
Subject(s):
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Matemàtiques |
Rights:
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L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons:http://creativecommons.org/licenses/by-nc-nd/4.0/ |
Pages:
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18 p. |
Document type:
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Article Article - Published version |
DOI:
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doi.org/10.1371/journal.pone.0153559
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Publish at:
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PLoS One
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Share:
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