Three-dimensional numerical simulation of a vortex ring impinging on a circular cylinder

2015 ◽  
Vol 47 (2) ◽  
pp. 025507 ◽  
Author(s):  
Heng Ren ◽  
Genxuan Zhang ◽  
Hongshan Guan
Keyword(s):  
Numerical Simulation ◽  
Circular Cylinder ◽  
Vortex Ring ◽  
Three Dimensional

scholarly journals Direct Numerical Simulation of Flow around a Circular Cylinder Controlled Using Plasma Actuators

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Taichi Igarashi ◽  
Hiroshi Naito ◽  
Koji Fukagata
Keyword(s):  
Numerical Simulation ◽  
Circular Cylinder ◽  
Direct Numerical Simulation ◽  
Drag Reduction ◽  
Three Dimensional ◽  
Reduction Rate ◽  
Plasma Actuators ◽  
Two Dimensional ◽  
Freestream Velocity ◽  
The Mean

Flow around a circular cylinder controlled using plasma actuators is investigated by means of direct numerical simulation (DNS). The Reynolds number based on the freestream velocity and the cylinder diameter is set atReD=1000. The plasma actuators are placed at±90° from the front stagnation point. Two types of forcing, that is, two-dimensional forcing and three-dimensional forcing, are examined and the effects of the forcing amplitude and the arrangement of plasma actuators are studied. The simulation results suggest that the two-dimensional forcing is primarily effective in drag reduction. When the forcing amplitude is higher, the mean drag and the lift fluctuations are suppressed more significantly. In contrast, the three-dimensional forcing is found to be quite effective in reduction of the lift fluctuations too. This is mainly due to a desynchronization of vortex shedding. Although the drag reduction rate of the three-dimensional forcing is slightly lower than that of the two-dimensional forcing, considering the power required for the forcing, the three-dimensional forcing is about twice more efficient.

scholarly journals Numerical simulation of three-dimensional breaking waves and its interaction with a vertical circular cylinder

2017 ◽  
Vol 29 (5) ◽  
pp. 800-804 ◽  
Author(s):  
Zhihua Xie ◽  
Lin Lu ◽  
Thorsten Stoesser ◽  
Jian-guo Lin ◽  
Dimitrios Pavlidis ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Circular Cylinder ◽  
Three Dimensional ◽  
Breaking Waves

Three-dimensional numerical simulation of the flow past a circular cylinder based on LES method

2009 ◽  
Vol 8 (2) ◽  
pp. 110-116 ◽  
Author(s):  
Hai-long Chen ◽  
Shao-shi Dai ◽  
Jia Li ◽  
Xiong-liang Yao
Keyword(s):  
Numerical Simulation ◽  
Circular Cylinder ◽  
Three Dimensional ◽  
Flow Past
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