TY - GEN
T1 - Analytical and experimental studies of diffuser/nozzle valve-less micro-pump
AU - Tanaka, Seiichi
AU - Moriyama, Shun
AU - Tsukamoto, Hiroshi
AU - Miyazaki, Koji
PY - 2008
Y1 - 2008
N2 - A valve-less micro-pump was realized with just one diffuser/nozzle element. The pressure-loss in a nozzle is lower than that in a diffuser, and therefore one-way flow may be realized in the nozzle direction. The frequency characteristics and the pump characteristics are measured. Dimensionless numbers are introduced to rearrange the measured data and to understand the physical mechanisms of the micro-pump. Simplified analysis was done for unsteady operation of the pump by considering the channel geometries and pressure-loss coefficients based on Bernoulli's theorem. The calculated pump characteristics agreed with the measured ones. Numerical calculations were made using the commercial CFD (computational fluid dynamics) code CFX. The calculated flow patterns showed differences between the diffuser and nozzle directions.
AB - A valve-less micro-pump was realized with just one diffuser/nozzle element. The pressure-loss in a nozzle is lower than that in a diffuser, and therefore one-way flow may be realized in the nozzle direction. The frequency characteristics and the pump characteristics are measured. Dimensionless numbers are introduced to rearrange the measured data and to understand the physical mechanisms of the micro-pump. Simplified analysis was done for unsteady operation of the pump by considering the channel geometries and pressure-loss coefficients based on Bernoulli's theorem. The calculated pump characteristics agreed with the measured ones. Numerical calculations were made using the commercial CFD (computational fluid dynamics) code CFX. The calculated flow patterns showed differences between the diffuser and nozzle directions.
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U2 - 10.1115/MNHT2008-52209
DO - 10.1115/MNHT2008-52209
M3 - Conference contribution
AN - SCOPUS:49449108033
SN - 0791842924
SN - 9780791842928
T3 - 2008 Proceedings of the ASME Micro/Nanoscale Heat Transfer International Conference, MNHT 2008
SP - 203
EP - 210
BT - 2008 Proceedings of the ASME Micro/Nanoscale Heat Transfer International Conference, MNHT 2008
T2 - 1st ASME Micro/Nanoscale Heat Transfer International Conference, MNHT08
Y2 - 6 January 2008 through 9 January 2008
ER -