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Numerical and Experimental Analysis of Monostable Mini- and Micro-Oscillators

[+] Author Affiliations
Rachid Khelfaoui, Stéphane Colin, Robert Caen, Stéphane Orieux, Lucien Baldas

LGMT-INSA, Toulouse, France

Paper No. ICNMM2007-30126, pp. 717-724; 8 pages
  • ASME 2007 5th International Conference on Nanochannels, Microchannels, and Minichannels
  • ASME 5th International Conference on Nanochannels, Microchannels, and Minichannels
  • Puebla, Mexico, June 18–20, 2007
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4272-X | eISBN: 0-7918-3800-5
  • Copyright © 2007 by ASME


An asymmetric micro-oscillator design based on a monostable fluidic amplifier is proposed. Experimental data with various feedback loop configurations point out that the main effect responsible for the oscillation is a capacitive and not a propagative effect. Actually, sound propagation in the feedback loop only generates a secondary oscillation which is not strong enough to provoke the jet switching. Data from a hybrid simulation using a commercial CFD code and a simple analytical model are in good agreement with the experimental data. A more compact plane design with reduced feedback loop volumes is also studied through a fully CFD simulation that confirms the previous conclusions.

Copyright © 2007 by ASME



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