Numerical study of diodicity mechanism in different tesla-type microvalves

A. Y. Nobakht, M. Shahsavan, A. Paykani

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


Microvalve is one of the most important components in microfluidic systems and micropumps. In this paper, threedimensional 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.

Original languageEnglish
Pages (from-to)876-885
Number of pages10
JournalJournal of Applied Research and Technology (JART)
Issue number6
Publication statusPublished - 1 Jan 2013
Externally publishedYes


  • Diodicity
  • Pressure field
  • Tesla microvalve
  • Velocity field


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