Analytical and experimental studies of diffuser/nozzle valve-less micro-pump

Seiichi Tanaka, Shun Moriyama, Hiroshi Tsukamoto, Koji Miyazaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publication2008 Proceedings of the ASME Micro/Nanoscale Heat Transfer International Conference, MNHT 2008
Pages203-210
Number of pages8
DOIs
Publication statusPublished - 2008
Externally publishedYes
Event1st ASME Micro/Nanoscale Heat Transfer International Conference, MNHT08 - Tainan, Taiwan, Province of China
Duration: Jan 6 2008Jan 9 2008

Publication series

Name2008 Proceedings of the ASME Micro/Nanoscale Heat Transfer International Conference, MNHT 2008
VolumePART A

Other

Other1st ASME Micro/Nanoscale Heat Transfer International Conference, MNHT08
Country/TerritoryTaiwan, Province of China
CityTainan
Period1/6/081/9/08

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics

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