Abstract
A vorticity-velocity method was used to study the incompressible viscous fluid flow around a circular cylinder with surface suction or blowing. The resulted high order implicit difference equations were effeciently solved by the modified incomplete LU decomposition conjugate gradient scheme (MILU-CG). The effects of surface suction or blowing’s position and strength on the vortex structures in the cylinder wake, as well as on the drag and lift forces at Reynoldes number Re=100 were investigated numerically. The results show that the suction on the shoulder of the cylinder or the blowing on the rear of the cylinder can effeciently suppress the asymmetry of the vortex wake in the transverse direction and greatly reduce the lift force; the suction on the shoulder of the cylinder, when its strength is properly chosen, can reduce the drag force significantly, too.
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Communicated by LIN Jian-zhong
Foundation item: the Natural Science Foundation of Jiangsu Province (BK97056109)
Biography: LING Guo-ping (1945−)
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Guo-ping, L., Jian-wen, F. Numerical study on the flow around a circular cylinder with surface suction or blowing using vorticity-velocity method. Appl Math Mech 23, 1089–1096 (2002). https://doi.org/10.1007/BF02437720
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DOI: https://doi.org/10.1007/BF02437720
Key words
- circular cylinder with surface suction or blowing
- separated vortex flow around bluff body and its control
- vorticity-velocity method
- preconditioned conjugate gradient method