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Numerical Computation of the Mass Transfer between Gaseous and Particulate Materials Considering the Hysteresis Phenomena of Atmospheric Aerosol

에어로솔의 이력현상을 고려한 대기 중 기체상/입자상 간의 물질전달 수치모사

  • Kim, Du-Eil (Process Systems Laboratory, Department of Chemical Engineering, Seoul National University of Technology) ;
  • Yoo, Kee-Youn (Process Systems Laboratory, Department of Chemical Engineering, Seoul National University of Technology)
  • 김두일 (서울산업대학교 화학공학과 공정시스템 연구실) ;
  • 류기윤 (서울산업대학교 화학공학과 공정시스템 연구실)
  • Received : 2010.01.27
  • Accepted : 2010.03.09
  • Published : 2010.04.30

Abstract

It is well known that the atmospheric inorganic aerosol has the hysteresis phenomena depending on the history of relative humidity. However, the current computational researches have assumed that the physical/chemical state of atmospheric aerosol is only determined by a branch of hysteresis, efflorescence or deliquescence. In this work, we applied the MATLAB-based UHAEROm thermodynamics module to simulate the dynamic interaction between gaseous species $NH_3$ and $HNO_3$, and the two mono-disperse particulate populations in the course of efflorescence and deliquescence, respectively. We conducted the 10 case studies considering the particulate phase with the atmospherically prevailing chemical composition and found that the final states of the particles are determined through the qualitatively five different trajectories by the dynamic interaction between gaseous and two different kinds of particulates. As a result, we show that the coexistence of meta-stable and stable particles drives the different physical/chemical destination comparing with the ones generated from the solitary efflorescence or deliquescence branch.

Acknowledgement

Supported by : 기상청

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