http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
3D 비격자 몬테 카를로 방법을 이용한 비가역적 콜로이드 응집체 모사 연구
김송길(Songkil Kim),이광승(Kwang-Seung Lee),이동근(Donggeun Lee) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Insights into the formation and the structure of colloidal aggregates are essential in many fields of science and engineering. Especially, controllability of aggregate structure with adjusting the experimental conditions is very important in fabricating nanoparticle catalysts which can be applied to energy systems like nanofluids, fuel cell and solar cell. In this work, 3D off lattice Monte Carlo simulation was implemented to irreversible cluster-cluster aggregations in the diluted system for different sticking probabilities which determine aggregation kinetics and structure. Firstly, DLCA regime (P<SUB>ij</SUB>=1) and RLCA regime (P<SUB>ij</SUB>=0.05) were simulated to validate the code, and the fractal dimensions for two regimes were obtained 1.8 and 2.1 respectively, which are in good agreement to the previous researches. The structure and kinetics of the aggregates were studied for different sticking probabilities.
5~50㎚ 입자 직경에서 집속 가능한 새로운 공기역학렌즈의 개발과 특성에 관한 연구
이광승(Kwang-Seung Lee),김송길(Songkil Kim),오용석(Yongsuk Oh),이동근(Donggeun Lee) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
An orifice type of aerodynamic lens is generally used to focus nanoparticles. However, it is impossible to focus particles smaller than 10㎚ in air due to flow instability of fluid in a lens. In this study, we propose a new converging-diverging type of the aerodynamic lens capable of focusing particles of 5-50㎚ in air. Designing factors of the lens configurations is also extracted and explained in detail through a numerical simulation. It was demonstrated that the aerosols are delivered from the entrance to the downstream of the lens system with 90% transmission efficiency. The final beam diameters are shown to be more or less l ㎜ in the range of particle size.