Deposition velocity of particles in charge equilibrium onto a flat plate in parallel airflow under the influence of simultaneous electrophoresis and thermophoresis
- Authors
- Lee, Handol; Yook, Se-Jin
- Issue Date
- Jan-2014
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Deposition velocity; Charge equilibrium; Electrophoresis; Thermophoresis
- Citation
- JOURNAL OF AEROSOL SCIENCE, v.67, pp.166 - 176
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF AEROSOL SCIENCE
- Volume
- 67
- Start Page
- 166
- End Page
- 176
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/160889
- DOI
- 10.1016/j.jaerosci.2013.10.006
- ISSN
- 0021-8502
- Abstract
- Deposition velocity onto a 450-mm-flat-plate in parallel airflow was numerically investigated by considering the influence of simultaneous electrophoresis and thermophoresis on particles in charge equilibrium. Both the face-up and face-down orientations of the flat plate were considered. When the electric field strength was 0 V/cm, the deposition velocity of particles in charge equilibrium was greatly influenced by thermophoresis, in the size range between 0.005 mu m and 3 mu m. With increasing electric field strength, the deposition velocity of particles in charge equilibrium under the existence of thermophoresis increased for both the face-up and face-down surfaces and the size range of particles affected by thermophoresis became narrower. The electric field of 1000 V/cm appeared to make the deposition velocity of particles in charge equilibrium almost unaffected by thermophoresis. For the face-down surface, the deposition velocity of micrometer-sized particles dropped sharply even with the attractive thermophoresis and electrophoresis, owing to gravitational settling effect. With a strong electric field applied, the deposition velocity of particles smaller than approximately 3 mu m onto both the face-up and face-down surfaces was expected to be high, even thermophoresis was repulsive.
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