The Visual Observation of Vortex Shedding from an In-Line Forced Oscillating Square Cylinder with an Attack Angle of 45 degree

2003 ◽  
Vol 2003.2 (0) ◽  
pp. 363-364
Author(s):  
Yoshifumi YOKOI ◽  
Susumu INAGAKI ◽  
Toshinori TAMAI ◽  
Shunnsuke HAMA ◽  
Keiko HIRAO
Keyword(s):  
Vortex Shedding ◽  
Visual Observation ◽  
Attack Angle ◽  
Square Cylinder ◽  
Oscillating Square Cylinder

The Visual Observation of Vortex Shedding from an In-Line Forced Oscillating Square Cylinder

2002 ◽  
Vol 2002 (0) ◽  
pp. 229-230
Author(s):  
Yoshifumi YOKOI ◽  
Susumu INAGAKI ◽  
Shunnsuke HAMA ◽  
Toshinori TAMAI ◽  
Keiko HIRAO
Keyword(s):  
Vortex Shedding ◽  
Visual Observation ◽  
Square Cylinder ◽  
Oscillating Square Cylinder

Effect of rounded corners on two degree of freedom naturally oscillating square cylinder

2017 ◽  
Vol 27 (10) ◽  
pp. 2355-2374 ◽  
Author(s):  
Sajjad Miran ◽  
Chang Hyun Sohn
Keyword(s):  
Vortex Shedding ◽  
Frequency Ratio ◽  
Degrees Of Freedom ◽  
Aerodynamic Characteristics ◽  
Two Dimensions ◽  
Cylinder Wake ◽  
Square Cylinder ◽  
Content Type ◽  
Oscillating Square Cylinder ◽  
Drag And Lift

Purpose The paper aims to study the influence of rounded corners on the flow-induced oscillation of a square cylinder that is free to oscillate in two degrees of freedom. Design/methodology/approach The finite volume code in conjunction with the moving mesh scheme was implemented via a user-defined function to carry out the computations in two dimensions. The Reynolds number (Re) chosen for the present study is fixed at 100, and the frequency ratio, Fr = fs/fn (where fs is the vortex shedding frequency and fn is the natural frequency of cylinder) is used as a varying parameter. The computational model was validated for flow past a stationary cylinder with R/D = 0 and 0.5, and the results showed good agreement with the literature. Findings The aerodynamic characteristics, amplitude response, trajectories of cylinder motion and vortex shedding modes are obtained by conducting a series of simulations under different frequency ratios of the cylinder. It was found that the minimum transverse amplitude, drag force and lift force obtained for a naturally oscillating square cylinder are quite different when compared with a stationary and forced oscillating cylinder, where the maximum drag and lift forces were observed for a square cylinder and a minimum around R/D = 0.2 was observed. Originality/value The present work identified the significant effect of the varying frequency ratio and R/D on the VIV modes of the cylinder. It was observed that the cylinder wake exhibits the (2S) vortex shedding mode for R/D = 0 to 0.2 at all Fr, whereas the C (2S) mode appeared for R/D > 0.2 at Fr = 1.1.

COMPARISON OF LES WITH DSM, k-ε AND EXPERIMENTS FORTURBULENT VORTEX SHEDDING FLOW PAST 2D SQUARE CYLINDER

1994 ◽  
Vol 59 (459) ◽  
pp. 49-56 ◽  
Author(s):  
Shigehiro SAKAMOTO ◽  
Akashi MOCHIDA ◽  
Shuzo MURAKAMI ◽  
Wolfgang RODI
Keyword(s):  
Vortex Shedding ◽  
Square Cylinder ◽  
Flow Past

Computation of Vortex-Shedding Flows Past a Square Cylinder Employing LES and RANS

1998 ◽  
pp. 260-277
Author(s):  
D. Lakehal ◽  
F. Thiele ◽  
L. Duchamp Lageneste ◽  
M. Buffat
Keyword(s):  
Vortex Shedding ◽  
Square Cylinder

Computation of Vortex-Shedding Flows Past a Square Cylinder Employing LES and RANS

1998 ◽  
pp. 260-277 ◽  
Author(s):  
D. Lakehal ◽  
F. Thiele ◽  
L. Duchamp de Lageneste ◽  
M. Buffat
Keyword(s):  
Vortex Shedding ◽  
Square Cylinder
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