Effect of Brownian diffusion on electrical classification of ultrafine aerosol particles in differential mobility analyzer.
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概要
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Effect of Brownian diffusion on the electrical classification of ultrafine particles in the differential mobility analyzer (DMA) has been studied theoretically and experimentally. Two kinds of particle losses which are undesirable in size analysis, (1) loss caused by the Brownian diffusion of particles traversing the sheath air stream toward the collector rod of the DMA, and (2) loss caused by Brownian diffusive deposition of particles on every wall of the DMA excluding the collector surface, were theoretically evaluated by solving the diffusion equation. Some of the calculation results were confirmed by experiments for particles of various sizes, two different lengths of DMA and various ratios of flow rate of aerosol to sheath air.
- 公益社団法人 化学工学会の論文
著者
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Okuyama Kikuo
Department Of Chemical Engineering Faculty Of Engineering Hiroshima University
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Kousaka Yasuo
Department Of Chemical Engineering Osaka Prefecture University
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ADACHI Motoaki
Department of Chemical Engineering, Graduate School of Engineering, Osaka Prefecture University
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ADACHI MOTOAKI
Department of Chemical Engineering, University of Osaka Prefecture
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MIMURA TADAAKI
Department of Chemical Engineering, University of Osaka Prefecture
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