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Mechanism of droplet-formation in a supersonic microfluidic spray device
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Kartanas, T., Toprakcioglu, Z., Hakala, T. A., Levin, A., Herling, T. W., Daly, R., Charmet, Jérôme and Knowles, T. P. J. (2020) Mechanism of droplet-formation in a supersonic microfluidic spray device. Applied Physics Letters, 116 . 153702 . doi:10.1063/1.5145109 ISSN 0003-6951.
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WRAP-Mechanism-droplet-supersonic-microfluidic-device-Charmet-2020.pdf - Accepted Version - Requires a PDF viewer. Download (2912Kb) | Preview |
Official URL: https://doi.org/10.1063/1.5145109
Abstract
Spray drying is an approach employed in automotive, food, and pharmaceutical industries as a robust and cost efficient liquid atomization technique offering direct control over droplet dimensions. The majority of commercially available spray nozzles are designed for large throughput spray drying applications or uniform surface coating, but microfluidic nebulizers have recently been developed as small scale alternatives. Here, we explore the physical parameters that define the droplet size and formation under supersonic flow conditions commonly found in microfluidic spray drying systems. We examined the spray nozzle operation using high speed imaging and laser scattering measurements, which allowed us to describe the spray regimes and droplet size distributions. It was determined that by using this spray nozzle device, droplets with diameters of 4–8 μm could be generated. Moreover, we show that the supersonic de Laval nozzle model can be used to predict the average droplet size. Our approach can be used as a platform for interfacing fluid microprocessing with gas phase detection and characterization.
Item Type: | Journal Article | |||||||||||||||||||||||||||
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Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | |||||||||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Spray drying, Fluid mechanics, Flow visualization | |||||||||||||||||||||||||||
Journal or Publication Title: | Applied Physics Letters | |||||||||||||||||||||||||||
Publisher: | American Institute of Physics | |||||||||||||||||||||||||||
ISSN: | 0003-6951 | |||||||||||||||||||||||||||
Official Date: | 13 April 2020 | |||||||||||||||||||||||||||
Dates: |
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Volume: | 116 | |||||||||||||||||||||||||||
Article Number: | 153702 | |||||||||||||||||||||||||||
DOI: | 10.1063/1.5145109 | |||||||||||||||||||||||||||
Status: | Peer Reviewed | |||||||||||||||||||||||||||
Publication Status: | Published | |||||||||||||||||||||||||||
Reuse Statement (publisher, data, author rights): | The following article has been submitted to/accepted by Applied Physics Letters. After it is published, it will be found at https://aip.scitation.org/journal/apl | |||||||||||||||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||||||||||||||
Date of first compliant deposit: | 8 April 2020 | |||||||||||||||||||||||||||
Date of first compliant Open Access: | 9 April 2020 | |||||||||||||||||||||||||||
RIOXX Funder/Project Grant: |
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