Experimental study on the manipulation of sub-micron aerosol by acoustic streaming

Tsz Wai Lai, Thilhara Tennakoon, Sau Chung Fu, Ka Chung Chan, Christopher Y.H. Chao

Research output: Unpublished conference presentation (presented paper, abstract, poster)Conference presentation (not published in journal/proceeding/book)Academic researchpeer-review

Abstract

Exposure to particle matter poses health hazards to occupants. Monitoring personal exposure is essential but the application of particle sizers is limited. Microfluidics offers a compact and low-cost alternative to aerosol distribution measurement. This study investigated the feasibility of separating sub-micron airborne particles in Lab-on-a-Chip devices. A new separation technique is developed using the particle concentration effect (PCE) of the acoustic streaming effect (ASE) in microchannel. The effects of particle size and microchannel's height on the ASE-induced particle motion is evaluated. The results indicate that increasing the microchannel's height can enhance PCE, allowing the control of particles as small as 0.31µm. The microchannel's height also affects the size and location of the streaming vortices, leading to the separation of ASE-driven particles and particles that are simultaneously influenced by both ASE and acoustic radiation force. This technique has the potential to be developed into miniature ultrafine particle sorters.

Original languageEnglish
Publication statusPublished - 2022
Event17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022 - Kuopio, Finland
Duration: 12 Jun 202216 Jun 2022

Conference

Conference17th International Conference on Indoor Air Quality and Climate, INDOOR AIR 2022
Country/TerritoryFinland
CityKuopio
Period12/06/2216/06/22

Keywords

  • Acoustic streaming
  • Microfluidics
  • Particle sensors
  • Particle sorting
  • Sub-micron particles

ASJC Scopus subject areas

  • Pollution

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