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국회도서관 홈으로 정보검색 소장정보 검색

초록보기

Understanding particle-laden flow around cylindrical bodies is essential for the better design of various applications such as filters. In this study, laminar flows around two tandem cylinders and the motions of particles in the flow are numerically investigated at low Reynolds numbers. We aim to reveal the effects of the spacing between cylinders, Reynolds number and particle Stokes number on the characteristics of particle trajectories. When the cylinders are placed close, the unsteady flow inside the inter-cylinder gap at Re = 100 shows a considerable modification. However, the steady recirculation flow in the wake at Re = 10 and 40 shows an insignificant change. The change in the flow structure leads to the variation of particle dispersion pattern, particularly of small Stokes number particles. However, the dispersion of particles with a large Stokes number is hardly affected by the flow structure. As a result, few particles are observed in the cylinder gap regardless of the cylinder spacing and the Reynolds number. The deposition efficiency of the upstream cylinder shows no difference from that of a single cylinder, increasing as the Stokes number increases. However, the deposition on the downstream cylinder is found only at Re = 100 with large spacing. At this time, the deposition efficiency is generally small compared to that of an upstream cylinder, and the deposition location is also changed with no deposited particles near the stagnation point.

권호기사

권호기사 목록 테이블로 기사명, 저자명, 페이지, 원문, 기사목차 순으로 되어있습니다.
기사명 저자명 페이지 원문 목차
낮은 레이놀즈 수에서 두 개의 원형 실린더 주위 유동 및 입자 거동 해석 = Simulation of fluid flow and particle transport around two circular cylinders in tandem at low Reynolds numbers Diaelhag Aisa Hamid Khalifa, 정석민, 김동주 p. 81-89

화학적·광학적·분광학적 방법을 이용한 광주 도심지역 여름철 초미세먼지의 특성 = Characterization of fine particulate matter during summer at an urban site in Gwangju using chemical, optical, and spectroscopic methods 손세창, 박태언, 박승식 p. 91-106

거실의 공기청정기가 거실과 침실의 초미세먼지 농도 저감에 미치는 영향 = Effect of living room air purifier on reducing PM2.5 in living room and bedroom 지준호, 주상우 p. 107-114

직화구이 음식점 방지시설의 오염물질 저감 효과 평가 : Evaluation of removal efficiency in emission pollutants by air pollution prevention facilities from meat grilled restaurants : focus on the electrostatic precipitator / 전기집진방식을 중심으로 서장원, 김영일, 이희선, 김지훈, 김영두, 신진호 p. 115-123

분광학적 방법을 이용한 바이오매스 연소 배출 유기 입자의 화학적 특성 = Characterization of fine organic aerosols from biomass burning emissions using FTIR method 손세창, 박태언, 박승식 p. 125-132

북한의 중공업 부문 대기오염물질 배출량 추정 = Estimation of air pollutant emissions from heavy industry sector in North Korea 이영원, 김용표, 여민주 p. 133-148