A large eddy simulation of the near wake of a circular cylinder

2002 ◽  
Vol 18 (1) ◽  
pp. 18-30 ◽  
Author(s):  
Lu Xiyun ◽  
Ling Guocan
Keyword(s):  
Circular Cylinder ◽  
Large Eddy Simulation ◽  
Near Wake ◽  
Eddy Simulation ◽  
Large Eddy

A Large-Eddy Simulation of the Near Wake of a Circular Cylinder

1998 ◽  
Vol 120 (2) ◽  
pp. 243-252 ◽  
Author(s):  
S. A. Jordan ◽  
S. A. Ragab
Keyword(s):  
Circular Cylinder ◽  
Large Eddy Simulation ◽  
Dynamic Model ◽  
Curvilinear Coordinates ◽  
Reynolds Stresses ◽  
Near Wake ◽  
Mean Velocity ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Global And Local

The formation and the downstream transport of the Strouhal vortices in the near wake of a circular cylinder are investigated using the large-eddy simulation (LES) method. The governing equations are formulated in curvilinear coordinates to accommodate a nonorthogonal grid with formal development of a dynamic model to account for the subgrid turbulent scales. Results were produced with and without use of the model. The focus of the investigation is at a subcritical Reynolds number of 5600. Using the dynamic model, the LES results compared best to the published experimental data in terms of both the global and local wake characteristics such as the drag and base pressure coefficients, shedding and detection frequencies, peak vorticity, and the downstream mean velocity-defect and Reynolds stresses. The results further showed streamwise filaments that connect subsequent Strouhal vortices. Qualitatively, the time-averaged Reynolds stresses of the formation region revealed similar symmetric characteristics over the range 525 ≤ Re ≤ 140,000.

Large eddy simulation of the near wake of a rectangular wing

1998 ◽  
Author(s):  
K. Youssef ◽  
S. Ragab ◽  
W. Devenport ◽  
A. Abde
Keyword(s):  
Large Eddy Simulation ◽  
Near Wake ◽  
Eddy Simulation ◽  
Large Eddy
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