DynamicSimulationforAerosol - 26 2 J. KOSAE Vol. 26, No. 2...

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한국대기환경학회지 제 26 권제 2 1. 서 대기 중 입자상은 여러 대기오염물질 가운데에서 인체 위해성이 매우 높을 뿐 아니라 , 스모그와 시정 장애 , 그리고 직 - 간접적으로 지구의 에너지 수지에 영향을 미치는 중요한 저감 대상 물질이다 . 이러한 대기 중 입자상은 크기에 따라 총 부유분진 (total sus- pended particle, TSP), 미세먼지 ( 구형의 입자를 가정 하였을 때 지름이 10 μ m 이하인 먼지 , PM 10 ), 극미세 먼지 ( 지름이 2.5 μ m , PM 2.5 ) 로 구분할 수 있다 . 이 중 미세먼지를 효과적으로 저감하기 위한 한국대기환경학회지 제 26 2 J. KOSAE Vol. 26, No. 2 (2010) pp. 202 ~ 218 Journal of Korean Society for Atmospheric Environment 에어로솔의 이력현상을 고려한 대기 중 기체상 / 입자상 간의 물질전달 수치모사 Numerical Computation of the Mass Transfer between Gaseous and Particulate Materials Considering the Hysteresis Phenomena of Atmospheric Aerosol 김두일∙류기윤 * 서울산업대학교 화학공학과 공정시스템 연구실 (2010 1 27 일접수 , 2010 3 4 일수정 , 2010 3 9 일채택 ) D.E. Kim and K.Y. Yoo * Process Systems Laboratory, Department of Chemical Engineering, Seoul National University of Technology (Received 27 January 2010, revised 4 March 2010, accepted 9 March 2010) 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 atmos- pherically 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. Key words : Aerosol thermodynamics, Aerosol dynamics, UHAEROm, Mass transfer, Aerosol hysteresis *Corresponding author. Tel : +82-(0)2-970-6610, E-mail : [email protected]
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정책을 수립하기 위해서는 미세먼지 농도의 변화 추 이와 현황 및 생성기작을 이해하는 것이 필수적이다 .
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This note was uploaded on 05/09/2010 for the course CHEM. ENG. Envoronmen taught by Professor Yoo during the Spring '10 term at 카이스트, 한국과학기술원.

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DynamicSimulationforAerosol - 26 2 J. KOSAE Vol. 26, No. 2...

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