Journal article
Fluctuation-theorem method of measuring a particle's mass without knowing its shape or density
Journal of aerosol science, Vol.129, pp.116-123
03/2019
DOI: 10.1016/j.jaerosci.2018.12.009
Abstract
Tracking the Brownian motion of aerosol particles as they settle in air allows a mass measurement. The particle typically falls downward at its terminal settling velocity; however, the particle occasionally will be displaced upwards due to Brownian fluctuations. The number of occurrences of upward and downward fluctuations is compared, using the formula for the work fluctuation theorem, to yield the mass. This method can be applied to either a single particle or a collection of particles. The advantages of this method include no required information about the size, shape, or density of the particle. Details of the analysis method are presented and illustrated with experimental data.
Details
- Title: Subtitle
- Fluctuation-theorem method of measuring a particle's mass without knowing its shape or density
- Creators
- Chun-Shang WongRanganathan Gopalakrishnan - University of MemphisJ Goree - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of aerosol science, Vol.129, pp.116-123
- DOI
- 10.1016/j.jaerosci.2018.12.009
- ISSN
- 0021-8502
- eISSN
- 1879-1964
- Grant note
- DOI: 10.13039/100000001, name: National Science Foundation, award: 11626451162645; name: US Department of Energy, award: DE-SC0014566; DOI: 10.13039/100000183, name: Army Research Office, award: W911NF1810240, A006827502; DOI: 10.13039/100000104, name: NASA, award: 1562068
- Language
- English
- Date published
- 03/2019
- Academic Unit
- Physics and Astronomy; Mechanical Engineering
- Record Identifier
- 9984200052202771
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