움직이는 벽 위의 실린더 주위의 유동장에 관한 수치적 연구

• Published in: 大韓造船學會 論文集 Vol. 44; no. 2; pp. 119 - 129
• Main Authors: 이재봉(Jae Bong Lee), 윤현식(Hyun Sik Yoon), 전호환(Ho Hwan Chun)
• Format: Journal Article
• Language: Korean
• Published: 대한조선학회 2007
• Subjects: 조선공학; Circular cylinder(원형주상체); Vortex shedding(와의 분계); Moving wall(움직이는 벽면); Immersed-boundary method(기상경계법)
• ISSN: 1225-1143; 2287-7355

The present study numerically investigates two-dimensional laminar fluid flow past a circular cylinder near a moving wall. For the purpose of a careful analysis of the modification of flow fields around a cylinder by a moving wall, numerical simulations to calculate the fluid flow past a circular cylinder are performed for different Reynolds numbers of 100, 140 and 180 in the range of , where is the ratio of the gap between the cylinder and a moving wall, and the cylinder diameter, . The present study reports the detailed information of flow quantities on the cylinder surface at different gap ratios. As the gap ratio decreases, the vortex shedding formed in the wake is suppressed and the oscillating amplitude of lift coefficient decreases. Thus the drag and lift coefficients representing the fluid flow characteristics also vary as a function of the gap ratio with the dependence of Reynolds number. KCI Citation Count: 3