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2016-04-22

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cc-by (c) Trejo Soto, Claudia Andrea et al., 2016
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/104353

Capillary filling at the microscale: control of fluid front using geometry

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Recurs relacionat

https://doi.org/10.1371/journal.pone.0153559

Resum

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.

Matèries

Viscositat, Glicols, Fluids, Plasma sanguini

Matèries (anglès)

Viscosity, Glycols, Fluids, Blood plasma

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Col·leccions

Articles publicats en revistes (Física de la Matèria Condensada)

Citació

TREJO SOTO, Claudia Andrea, et al. Capillary filling at the microscale: control of fluid front using geometry. PLoS One. 2016. Vol. 11, num. 4, pags. e0153559. ISSN 1932-6203. [consulted: 16 of August of 2026]. Available at: https://hdl.handle.net/2445/104353

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