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Aerosol을 이용한 Direct-Write 시스템에서 침착된 입자의 형상예측 모델에 관한 연구
박준정(Jun Jung Park),백성구(Seong Gu Baek),리광훈(Gwang Hoon Rhee) 한국전산유체공학회 2008 한국전산유체공학회지 Vol.13 No.1
Direct Write Technologies are being utilized in various industrial fields such as antennas, engineered structures, sensors and tissue engineering. With Direct Write Technologies, producing features have the mesoscale range, from 1 to 100 microns. One form of the Direct Write Technologies is based on aerosol dynamics. The shape of deposited aerosols determine the form of products in the Direct Write Technology based on aerosol dynamics. To predict shape of deposited aerosol, a prediction model is created. In this study, we estimated Line-Width and Line-Thickness from the prediction model. Results of prediction model is valid from comparison with experimental results.
도류벽 형태에 따른 정수지 내 유동 특성과 소독능 변화에 대한 수치 해석적 연구
이석원(Suk Won Lee),박준정(Jun Jung Park),리광훈(Gwang Hoon Rhee) 대한설비공학회 2006 대한설비공학회 학술발표대회논문집 Vol.2006 No.6
The SWTR(Surface Water Treatment Rule) requires achieving removal 99.9% Giardia and 99.99% Virus. To remove Giardia and Virus, disinfection process is essential process. CT is important index for Disinfection performance. CT value is expressed by C×T. C is represented by disinfection concentration and T is represented by T₁? which means 90% contact time in clearwell. To improve Disinfection performance, it is desirable to increase T₁?. Primary factor affected T₁? is flow pattern. Because guide wall change that flow pattern is uniform,, we have installed guide wall to increase T₁?. In this paper, we have performed numerical analysis for clearwell installed symmetric guide wall and center divided guide wall using CFD. We have analyzed flow pattern and T₁? in each clearwell. And, we compare symmetric guide wall with center divided guide wall in flow pattern and T₁?.