In this work we present an asymmetric microfluidics oscillator of innovative design and systematically investigated it with both numerical and experimental methods. The design of both entrance nozzle and asymmetric feedback channels enable the oscillator to stably oscillate in very small range of Reynolds number 1~100, whereas the Strouhal number remained as 1 × 10−3. The results reveal that improvement of the performance was resulted from the augmented periodic impingement of the flows from the feedback channels. The analysis also indicates that dynamic phenomena in the working fluid of this novel oscillator were distinctive and appropriately appraised.

Volume Subject Area:
Microelectromechanical Systems
Topics:
Microfluidics, Design, Feedback, Experimental methods, Flow (Dynamics), Fluids, Nozzles, Reynolds number
1.
Gebhard
U.
,
Hein
H.
, and
Schmidt
U.
,
1996
, “
Numerical Investigation of Fluidic Micro-oscillator
,”
J. Micromech. Microeng.
, Vol.
6
, pp.
115
–
117
.
2.
Jeon
M. K.
,
Kim
J. H.
,
Noh
J.
,
Kim
S. H.
,
Park
H. G.
, and
Woo
S. I.
,
2005
, “
Design and Characterization of a Passive Recycle Micromixer
,”
J. Micromech. Microeng.
, Vol.
15
, pp.
346
–
350
.
3.
Simoes, E. W., Furlan, R., Leminski R. E. B., Gongora-Rubio, M. R., Pereira, M. T., Morimoto, N. I., and Aviles, J. J. S., 2005, “Microfluidic Oscillator for Gas Flow Control and Measurement,” Vol. 16, pp. 7–12.
4.
Vollmer
J.
,
Hein
H.
,
Menz
W.
, and
Walter
F.
,
1994
, “
Bistable Fluidic Elements in LIGA Technique for Flow Control in Fluidic Microactuators
,”
Sensors and Actuators A
, Vol.
43
, pp.
330
–
334
.
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