| NUMERICAL STUDY ON THE FLOW AROUND A CIRCULAR CYLINDER WITH SURFACE SUCTION OR BLOWING USING VORTICITY-VELOCITY METHOD |
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| 作者姓名： | 凌国平 方健雯 |
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| 作者单位： | Department of Mathematics，Suzhou University，Suzhou 215006，P R China，Department of Mathematics，Suzhou University，Suzhou 215006，P R China |
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| 基金项目： | Foundation item:the Natural Science Foundation of Jiangsu Province(BK97056109) |
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| 摘 要： | 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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| 收稿时间： | 13 January 2000 |
Numerical study on the flow around a circular cylinder with surface suction or blowing using vorticity-velocity method |
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| Ling Guo-ping Professor,Fang Jian-wen.NUMERICAL STUDY ON THE FLOW AROUND A CIRCULAR CYLINDER WITH SURFACE SUCTION OR BLOWING USING VORTICITY-VELOCITY METHOD[J].Applied Mathematics and Mechanics(English Edition),2002,23(9):1089-1096. |
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| Authors: | Ling Guo-ping Professor Fang Jian-wen |
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| Institution: | Department of Mathematics, Suzhou University, Suzhou,215006, P R China |
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| 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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| Keywords: | circular cylinder with surface suction or blowing separated vortex flow around bluff body and its control vorticity-velocity method preconditioned conjugate gradient method |
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