This paper presents a thin millimeter-scaled device that can generate a closed flow within itself with a velocity of the order of a few m/s. The device comprises a piezoelectric pump with a PZT membrane, housing chamber, and a closed network channel connected to the housing chamber through a specific throat. We investigate the device by computational fluid dynamics. This device is used to produce several free jet flows depending on the structure of the network channel. In this study, four jet flows comprising two perpendicular pairs of flows are demonstrated. If the PZT membrane vibrates within a suitable range, the self-similarity of the axial velocity (along the jet direction) to the cross distances scaled by the half-widths of the jet is observed for a certain range of axial distance. Each jet flow can bend almost freely in three dimensions. The two remaining flow components are small as compared to the axial component. The device potentially has wide applications in flow-based sensors.
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e-mail: thien@cfd.ritsumei.ac.jp
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April 2009
Research Papers
A Principle to Generate Flow for Thermal Convective Base Sensors
Thien X. Dinh,
Thien X. Dinh
Department of Mechanical Engineering,
e-mail: thien@cfd.ritsumei.ac.jp
Ritsumeikan University
, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan
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Yoshifumi Ogami
Yoshifumi Ogami
Department of Mechanical Engineering,
Ritsumeikan University
, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan
Search for other works by this author on:
Thien X. Dinh
Department of Mechanical Engineering,
Ritsumeikan University
, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japane-mail: thien@cfd.ritsumei.ac.jp
Yoshifumi Ogami
Department of Mechanical Engineering,
Ritsumeikan University
, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, JapanJ. Fluids Eng. Apr 2009, 131(4): 041401 (6 pages)
Published Online: March 11, 2009
Article history
Received:
June 25, 2008
Revised:
January 14, 2009
Published:
March 11, 2009
Citation
Dinh, T. X., and Ogami, Y. (March 11, 2009). "A Principle to Generate Flow for Thermal Convective Base Sensors." ASME. J. Fluids Eng. April 2009; 131(4): 041401. https://doi.org/10.1115/1.3089538
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