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Numerical Flow Simulation in a Reciprocating Valveless Micropump With Parallel Geometry Nozzle-Diffuser

[+] Author Affiliations
Joaquín Fernández, Alfonso Marcos

Universidad de Extremadura, Badajoz, Extremadura, Spain

Raúl Barrio, Eduardo Blanco, Jorge L. Parrondo

Universidad de Oviedo, Gijón, Asturias, Spain

Paper No. AJK2011-03049, pp. 1407-1413; 7 pages
  • ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
  • ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D
  • Hamamatsu, Japan, July 24–29, 2011
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-4440-3
  • Copyright © 2011 by ASME


This work presents a numerical study of a nozzle/diffuser micropump under several frequencies of operation. The investigation focuses on the effects caused by two principal changes in the geometry: 1) a small duct portion included before the nozzle/diffuser element, with the purpose of inducing a fully developed flow, and 2) the size of the fluctuating chamber. As expected, the net flow rate of a nozzle/diffuser micropump increases with pumping frequency and also with the size of the fluctuating chamber. However, the duct before the nozzle/diffuser element causes more losses and a decrement in the net flow, though inducing a better flowing of the fluid into the nozzle.

Copyright © 2011 by ASME



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