High inertial microfluidics for droplet generation in a flow-focusing geometry.
A numerical study of aqueous droplet generation in a high Reynolds (Re) number air flow was performed in a microfluidic flow-focusing geometry. Droplet breakup mechanisms, flow regime mapping, droplet morphology, and droplet generation frequency were studied in a high initial air flow under various...
| Publicado en: | Biomedical Microdevices Vol. 21; no. 3 |
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| Autores principales: | , , , |
| Formato: | Journal Article |
| Publicado: |
Springer Nature
Sep2019
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=137722976&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 137722976 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 13872176 ODN jtl: Biomedical Microdevices issn: 13872176 maglogo: N pubinfo: dt: Sep2019 vid: 21 iid: 3 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 137722976 10.1007/s10544-019-0405-x 137722976 ppct: 1 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: High inertial microfluidics for droplet generation in a flow-focusing geometry. aug: au: Mastiani, Mohammad Seo, Seokju Riou, Benjamin Kim, Myeongsub affil: Department of Ocean and Mechanical Engineering, Florida Atlantic University, 777 Glades Road, 33431, Boca Raton, FL, USA sug: ab: A numerical study of aqueous droplet generation in a high Reynolds (Re) number air flow was performed in a microfluidic flow-focusing geometry. Droplet breakup mechanisms, flow regime mapping, droplet morphology, and droplet generation frequency were studied in a high initial air flow under various flow conditions. Several flow regimes were identified including dripping, unstable dripping, plugging, stratified flow, multi-satellite droplet formation, and unstable jetting. Unstable dripping, multi-satellite droplet formation, and unstable jetting have been observed as new flow regimes in our study. We found that the high inertial air flow remarkably induces the formation of these new flow regimes by retaining unique droplet generation mechanisms and morphology. In particular, the polydisperse spray of tiny droplets is formed at the junction in the multi-satellite droplet formation regime, while at the end of a jet in the unstable jetting regime. On the other hand, stable droplet generation occurs in the dripping and plugging regimes, while generated droplets in the unstable dripping, unstable jetting, and multi-satellite droplet formation regimes are unstable. The maximum generation frequency of ~ 1900 Hz was obtained under the unstable dripping regime. It was found that increasing Re number results in droplet size reduction, while higher capillary (Ca) number leads to bigger droplets. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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