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dc.contributorDepartment of Building Environment and Energy Engineeringen_US
dc.contributorDepartment of Mechanical Engineeringen_US
dc.creatorLai, TWen_US
dc.creatorFu, SCen_US
dc.creatorChan, KCen_US
dc.creatorChao, CYHen_US
dc.identifier.citationv. 56, no. 3, p. 247-260-
dc.identifier.otherv. 56, no. 3, p. 247-260-
dc.publisherTaylor & Francisen_US
dc.titleThe use of acoustic streaming in Sub-micron particle sortingen_US
dc.typeJournal/Magazine Articleen_US
dcterms.abstractThe lack of personal particulate matter (PM) monitoring technique hinders the knowledge of the negative health impacts caused by inhaling PM. Acoustophoresis has a potential to produce miniature particle sorters that can be carried inside human’s breath zone. Micron particles can be manipulated by Acoustic Radiation Force (ARF), but sub-micron particles can hardly be directed due to Acoustic Streaming Effect (ASE). The purpose of this study is to examine the feasibility of sorting sub-micron particles using ASE. In this study, a 2 D numerical model is used to simulate the movement of sub-micron particles, ranging from 0.1 µm to 0.9 µm in diameter with 0.1 µm step size, suspended in a microchannel. Since tiny particles circulate according to the streaming pattern, which depends on the geometry of the container, the effect of the microchannel’s cross-sectional shape on particle movement is investigated, from rectangular to non-rectangular. Results found that sub-micron particles are characterized as either ARF-dominant or ASE-dominant. ARF-dominant particles stop at the pressure node and sidewalls, while ASE-dominant particles are trapped by the streaming flow inside a certain area defined by the particle size. Larger ASE-dominant particles move in a narrower region close to the sidewalls; smaller particles occupy a wider area. Since ASE-dominant particles can be directed outside the settling location of ARF-dominated particles, separating them can reach 98.9% purity in a non-rectangular microchannel. Most importantly, separating ASE-dominant particles of different sizes is shown possible using a triangular microchannel. The findings imply that ASE can be the mechanism for sub-micron particle sorting.en_US
dcterms.accessRightsembargoed accessen_US
dcterms.bibliographicCitationAerosol science and technology, 2022, v. 56, no. 3, p. 247-260en_US
dcterms.isPartOfAerosol science and technologyen_US
dc.description.validate2022 bcvcen_US
dc.description.oaNot applicableen_US
dc.description.fundingTextCollaborative Research Fund (CRF) (project no. C7025-16G), General Research Fund (GRF) (project no.16206918)en_US
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Embargo End Date 2022-11-29
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