Wake Capture, Particle Breakup, and Other Artifacts Associated with Counterflow Virtual Impaction
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Cziczo_Wake capture.pdf
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831.62 KB
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7d82980aac29db761d33cfce565914e3
Author(s)
Pekour, Mikhail S.
Cziczo, Daniel James
Date Issued
March 2011
Journal
Aerosol Science and Technology
Publisher
Taylor & Francis
Citation
Pekour, Mikhail S., and Daniel J. Cziczo. “Wake Capture, Particle Breakup, and Other Artifacts Associated with Counterflow Virtual Impaction.” Aerosol Science and Technology 45.6 (2011): 758–764.
Version
Author's final manuscript
Abstract
Counterflow virtual impaction is used to inertially separate cloud elements from inactivated aerosol. Previous airborne, ground-based, and laboratory studies using this technique exhibit artifacts that are not fully explained by the impaction theory. We have performed laboratory studies that show small particles can be carried across the inertial barrier of the counterflow by collision and/or coalescence or riding the wake of larger particles with sufficient inertia. We have also performed theoretical calculations to show that aerodynamic forces associated with the requisite acceleration and deceleration of particles within a counterflow virtual impactor can lead to breakup. The implication of these processes on studies using this technique is discussed.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike 3.0
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1080/02786826.2011.558942
