자기장을 사용한 원형주상체 주위의 유동 제어 및 저항감소
Flow Control and Drag Reduction of a Circular Cylinder by an External Magnetic Field
2
조회
0
다운로드
3
인용
0
참고문헌
초록
Abstract
The present study numerically investigates two-dimensional laminar flow past a circular cylinder in an aligned magnetic field using the spectral method. Numerical simulations are performed for flow fields with Re=100 and 200 in the range of 0≤N≤10, where N is the Stuart number that is the ratio of electromagnetic force to inertial force. The present study reports the detailed information of flow quantities on the cylinder surface at different Stuart numbers. It is shown that the vortex shedding can be controlled by the magnetic force representing the Stuart number. As N increases, the vortex shedding becomes weaker, resulting in drag reduction whose magnitude is the largest at a critical value. In addition, as the magnetic force increases, the lift amplitude decreases, reaching zero at the critical number.
참고문헌 (20)
- "와도를 기조로 한 초기 순간 출발하는 실린더 주위의 점성유동해석", 35(4), pp.1~10 (1998)
- "진동하는 원형 주상체 주위의 와류 수치 모사", 40(2), pp.21~27 (2003)
- "미소기포 주입 에 의한 마찰저항 감소에 대한 연구", 40(3), pp.1~8 (2003)
- "폴리머 수용액주입에 의한 난류마찰저항 감소에 대한 실험 연구", 40(3), pp.9~15 (2003)
- "스펙트럴법을 이용한 원형주상체주위 층난류 유동 해석", 37(4), pp.31~39 (2000)
- "선저에 부착된 공기공동에 의한 선박의 저항감소에 관한 연구", 36(2), pp.1~8 (1999)
- "Numerical simulation of the flow behind a rotary oscillating circular cylinder", 10, pp.869~876 (1998)
- "“ Numerical study and physical analysisof the pressure and velocity fields in the nearwake of a circular cylinder ” J. of FluidMechanics", 165, pp.79~130 (1986)
- "“ Near-wall structure ofturbulent boundary layer with riblets", 208, pp.417~458 (1989)
- "Turbulant drag reduction using compiant surfaces", 453, pp.2229~2240 (1997)
- "Laminar flow past a rotating circular cylinder", 11, pp.3312~3321 (1999)
- "Control of laminar vortex shedding behind a circular cylinder using splitter plates", 8, pp.479~486 (1996)
- "Magnetohydro-dynamic turbulent flow in a channel at low magnetic Reynolds number", 439, pp.369~394 (2001)
- "“ Directnumerical simulation of flow past ellipticcylinders ” J. of Comp. Physics", 124, pp.351~367 (1994)
- "Two- and three dimensional instabilities of the cylinder wake in an external magnetic field", 9, pp.3114~3116 (1997)
- "Cylinder wake control by magnetic field in liquid metal flows", 16, pp.92~99 (1998)
- "The schnario of three dimensional instabilities of the cylinder wake in an external magnetic field : A linear stability analysis", 13, pp.723~734 (2001)
- "Numerical solutions of flow past a circular cylinder at Reynolds number up to 160", 12, pp.1200~1205 (1998)
- "Effects of uniform blowing or suction from a spanwise slot on a turbulent boundary layer", 11, pp.3095~3105 (1999)
- "Vortex dynamics in the cylinder wake", 28, pp.477~539 (1996)
