University of Hertfordshire

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Original languageEnglish
Publication statusPublished - 7 Sep 2014
Event4th Micro and Nano Flows Conference (MNF 2014) - University College London, Roberts building (Engineering), London, United Kingdom
Duration: 7 Sep 201410 Sep 2014

Conference

Conference4th Micro and Nano Flows Conference (MNF 2014)
CountryUnited Kingdom
CityLondon
Period7/09/1410/09/14

Abstract

A generic microfluidic system composed by two single chamber valveless micropumps connected to a simple T-type channel intersection is examined numerically. The characteristics of a feasible valveless micropump have been used in the design, where efficient mixing is produced due to the pulsating flow generated by the micropumps. The advantages of using time pulsing inlet flows for enhancing mixing in channels have been harnessed through the activation of intrinsic characteristics of the pumps required to achieve the periodic flows.
A parametric study is carried out on this microfluidic system using Computational Fluids Dynamics (CFD) on a design space defined by a Design-of-Experiments (DOE) technique. With this approach, the frequency f and the phase difference  of the periodic fluid velocities (operation parameters) and the angle  formed by the inlet channels at the intersection (geometric parameter) are used as design parameters, whereas mixing quality, pressure drop and maximum shear strain rate in the channel are the performance parameters. The study identifies design features for which the pressure drop and shear strain in the channel are reduced whereas the mixing quality is increased.
The proposed microfluidic system achieves high mixing quality with performance parameters that enable manipulation of biological fluids in microchannels.

ID: 7183857