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Licensed Unlicensed Requires Authentication Published by De Gruyter May 27, 2014

Tesla Valves in Micromixers

Chin-Tsan Wang, Yan-Ming Chen, Pei-An Hong and Yi-Ta Wang

Abstract

Micromixers are the devices which have the ability to mix liquids uniformly. However, a Tesla valve has the potential for micromixer development because of its simple structure and special flow mechanism. In this study, a numerical simulation analysis of a new Tesla-type micromixer was designed by placing a flow plate into a micromixer, which has a contact angle of 30° with the channel wall. The optimization of the geometric parameter, aspect ratio (AR) and the Reynolds number (Re) effect is discussed. The results show that the optimal geometric parameters of the unit Tesla-type micromixer are θ1 = 45°, θ2 = 30°, A = 0.3 mm, B = 0.22 mm, C = 0.3 mm, D = 0.25 mm, and the mixing efficiency can achieve εmixing = 0.953 by passing three-unit Tesla-type micromixers (inverse-type, Re = 1, AR = 1). The Tesla-type micromixers designed in this study, which have a lower pressure drop and a higher mixing performance at a low Reynolds number, can contribute to the application of biomedical chips and chemical reactors.

Acknowledgments

The authors would like to acknowledge the kind funding support from NSC Taiwan under contract #NSC-102-2221-E-197-015- and NSC-102-2623-E-197-001-ET. In addition, the authors would like to thank National Ilan University for financially supporting this research under Contract No. 101TGA-2B.

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Published Online: 2014-5-27
Published in Print: 2014-1-1

©2014 by De Gruyter