Diodicity mechanism Tesla-type microvalves: a CFD study

Liung Wang, Lin Xu and Yawen Tang

MPRA Paper from University Library of Munich, Germany

Abstract: Microvalve is one of the most important components in microfluidic systems and micropumps. In this paper, three-dimensional incompressible flow through a Tesla-type microvalve is simulated using FLUENT computational fluid dynamic package. The flow is laminar and SIMPLE algorithm is used. The second-order upwind method is implemented for discretizing convective terms. The diodicity mechanism is investigated in detail for three different microvalves. Effect of several series Tesla-type microvalves on diodicity is also studied. The numerical analyses reveal that the mechanism of diodicity occurs at the T-junction and side channel. If inlet and outlet channels are eliminated, diodicity can be increased by 2. Pressure field analysis shows that the pressure drop is much severe at the junction of the reverse flow compared to the forward flow. The obtained numerical results are compared with those of experimental and a good agreement between them is noticed.

Keywords: Tesla microvalve; diodicity; pressure field, velocity field (search for similar items in EconPapers)
JEL-codes: I0 (search for similar items in EconPapers)
Date: 2017-03-16, Revised 2017-06-19
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