2成分凝集エアロゾル粒子の形態特性と個別粒子の化学組成

• 東野 達

  京都大学原子エネルギー研究所

• 高橋 幹二

  京都大学原子エネルギー研究所

• 今井 郁夫

  日産自動車(株)

書誌事項

タイトル別名

• Morphological Characterization of Two-Component Aerosol Particles Undergoing Brownian Coagulation and Chemical Composition of Individual Particles

抄録

Morphological changes of two-component (Pb/NaCl) aerosol particles undergoing Brownian coagulation in a flowing system were studied by image processing of two-dimen-sional scanning electron micrographs of the particles. From the relationship between radii of gyration and perimeters of the particles, fractal dimensions were calculated considering the aggregates as multifractal (lower dimension d_l and higher dimension d_h). Changes in fractal dimension d_h were correlated to the degree of agglomeration. <BR> Chemical composition of individual particles was calculated by using diameter of primary Pb particles, side length of primary cubic NaCl particles and density of each constituents. Number distribution of the two-component particles was determined as a function of volume equivalent diameter and mass (or volume) fraction of the constituent, and time evolution of the distributions showed conversion of externally mixed aerosols to internally mixed ones due to Brownian coagulation. Mutimodality in NaCl mass distribution measured by cascade impactor could be reproduced by conversion of volume equivalent diameter to aerodynamic diameter using the primary particle sizes and density of two constituents.

収録刊行物

• エアロゾル研究

  エアロゾル研究 9 (4), 338-344, 1994

  日本エアロゾル学会

キーワード

• Two-Component Aerosols
• Fractal Dimension
• Morphology
• Chemical Composition Brownian Coagulation

詳細情報

• CRID: 1390001204341485312
• NII論文ID: 130000327862
• DOI: 10.11203/jar.9.338
• COI: 1:CAS:528:DyaK2MXjs1Ogt70%3D
• ISSN: 1881543X
• ISSN: 09122834
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可