Aerosol flow through a long and tapered micro-capillary (MC) for direct write (DW) technology is typically used with small particles of sizes ranging from 0.2 μm to 10 μm at velocities up to 100 m/s. Earlier research showed that the particles coming through a long MC experience Saffman force that moves the particles towards the center of the beam other than the geometric convergence (due to Stokes drag); thus creating a collimated aerosol beam. It was also established that the additional Saffman force becomes more effective with certain particle diameters and velocities. Therefore, for experimental validation, it is important to accurately measure the particle size distribution and velocities coming out of the long MC. However, the current sizing methods are incapable of measuring particles less than 5 μm due to optical limitations. The current paper presents results using a micro-shadowgraphy system from LaVision Inc. to characterize the flow field. A modification of the particle-sizing algorithm is proposed to measure particles of sub-micron sizes. The modified algorithm can be used to accurately size particles of 1μm diameter.
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ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels collocated with 3rd Joint US-European Fluids Engineering Summer Meeting
August 1–5, 2010
Montreal, Quebec, Canada
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-5450-1
PROCEEDINGS PAPER
Experimental Characterization of Aerosol Flow Through a Micro-Capillary
Zakaria Mahmud,
Zakaria Mahmud
North Dakota State University, Fargo, ND
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Justin M. Hoey,
Justin M. Hoey
North Dakota State University, Fargo, ND
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Artur Lutfurakhmanov,
Artur Lutfurakhmanov
North Dakota State University, Fargo, ND
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Jason Daugs,
Jason Daugs
North Dakota State University, Fargo, ND
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Orven F. Swenson,
Orven F. Swenson
North Dakota State University, Fargo, ND
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Douglas L. Schulz,
Douglas L. Schulz
North Dakota State University, Fargo, ND
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Iskander S. Akhatov
Iskander S. Akhatov
North Dakota State University, Fargo, ND
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Zakaria Mahmud
North Dakota State University, Fargo, ND
Justin M. Hoey
North Dakota State University, Fargo, ND
Artur Lutfurakhmanov
North Dakota State University, Fargo, ND
Jason Daugs
North Dakota State University, Fargo, ND
Orven F. Swenson
North Dakota State University, Fargo, ND
Douglas L. Schulz
North Dakota State University, Fargo, ND
Iskander S. Akhatov
North Dakota State University, Fargo, ND
Paper No:
FEDSM-ICNMM2010-30794, pp. 949-958; 10 pages
Published Online:
March 1, 2011
Citation
Mahmud, Z, Hoey, JM, Lutfurakhmanov, A, Daugs, J, Swenson, OF, Schulz, DL, & Akhatov, IS. "Experimental Characterization of Aerosol Flow Through a Micro-Capillary." Proceedings of the ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels collocated with 3rd Joint US-European Fluids Engineering Summer Meeting. ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels: Parts A and B. Montreal, Quebec, Canada. August 1–5, 2010. pp. 949-958. ASME. https://doi.org/10.1115/FEDSM-ICNMM2010-30794
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