High-performance microfluidic rectifier based on sudden expansion channel with embedded block structure

Chien Hsiung Tsai, Che Hsin Lin, Lung-Ming Fu, Hui Chun Chen

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

A high-performance microfluidic rectifier incorporating a microchannel and a sudden expansion channel is proposed. In the proposed device, a block structure embedded within the expansion channel is used to induce two vortex structures at the end of the microchannel under reverse flow conditions. The vortices reduce the hydraulic diameter of the microchannel and, therefore, increase the flow resistance. The rectification performance of the proposed device is evaluated by both experimentally and numerically. The experimental and numerical values of the rectification performance index (i.e., the diodicity, Di) are found to be 1.54 and 1.76, respectively. Significantly, flow rectification is achieved without the need for moving parts. Thus, the proposed device is ideally suited to the high pressure environment characteristic of most micro-electro-mechanical-systems (MEMS)-based devices. Moreover, the rectification performance of the proposed device is superior to that of existing valveless rectifiers based on Tesla valves, simple nozzle/diffuser structures, or cascaded nozzle/diffuser structures.

Original languageEnglish
Article number024108
JournalBiomicrofluidics
Volume6
Issue number2
DOIs
Publication statusPublished - 2012 Apr 26

Fingerprint

Microfluidics
rectifiers
Microchannels
Diffusers (fluid)
rectification
Equipment and Supplies
microchannels
expansion
Nozzles
Vortex flow
diffusers
nozzles
Micro-Electrical-Mechanical Systems
vortices
flow resistance
Hydraulics
hydraulics
Pressure

All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Materials Science(all)
  • Genetics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

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High-performance microfluidic rectifier based on sudden expansion channel with embedded block structure. / Tsai, Chien Hsiung; Lin, Che Hsin; Fu, Lung-Ming; Chen, Hui Chun.

In: Biomicrofluidics, Vol. 6, No. 2, 024108, 26.04.2012.

Research output: Contribution to journalArticle

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