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Thermophoretic particle deposition efficiency in turbulent tube flow |
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| Authors: | Jyh-Shyan Lin Chuen-Jinn Tsai Kuo-Lun Tung Hann-Chyuan Chiang |
| Affiliation: | aIndustrial Technology Research Institute, Office of Strategy and R&D Planning, 195 Chung Hsing Road, Sec.4 Chu Tung, Hsin Chu 310, Taiwan bInstitute of Environmental Engineering, National Chiao Tung University, Hsin Chu 300, Taiwan cR&D center for Membrane Technology and Department of Chemical Engineering, Chung Yuan Christian University, Chung-Li 320, Taiwan dDepartment of Environmental Engineering, National I-Lan University, I-Lan 260, Taiwan |
| Abstract: | This study investigated the thermophoretic particle deposition efficiency numerically. The critical trajectory was used to calculate thermophoretic particle deposition in turbulent tube flow. The numerical results obtained in turbulent flow regime in this study were validated by particle deposition efficiency measurements with monodisperse particles (particle diameter ranges from 0.038 to 0.498 μm) in a tube (1.18 m long, 0.43 cm i.d., stainless-steel tube). The theoretical predictions are found to fit the experimental data of Tsai et al. Tsai, C. J., J. S. Lin, S. G. Aggarwal, and D. R. Chen, “Thermophoretic Deposition of Particles in Laminar and Turbulent Tube Flows,” Aerosol Sci. Technol., 38, 131 (2004)] very well in turbulent flows. In addition, an empirical expression has been developed to predict the thermophoretic deposition efficiency in turbulent tube flow. |
| Keywords: | Thermophoretic deposition Aerosol sampling Turbulent flow |
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