A physical basis formulation for the electromagnetic backscattering by a finite-length rectangular trough in a ground plane

1993 ◽  
Vol 41 (4) ◽  
pp. 397-402 ◽  
Author(s):  
H.T. Shamansky ◽  
A. Dominek ◽  
N. Wang
Keyword(s):  
Finite Length ◽  
Ground Plane ◽  
Physical Basis ◽  
Electromagnetic Backscattering

scholarly journals Near Wake behind Square Cylinder of Finite Length on Ground Plane.

1995 ◽  
Vol 61 (589) ◽  
pp. 3105-3113 ◽  
Author(s):  
Shiki Okamoto ◽  
Kazumi Tsunoda ◽  
Tokujiro Takagi ◽  
Eiji Okada ◽  
Kenichi Kitani
Keyword(s):  
Finite Length ◽  
Ground Plane ◽  
Square Cylinder ◽  
Near Wake

scholarly journals Near Wake behind Circular Cylinder of Finite Length on Ground Plane.

1997 ◽  
Vol 63 (613) ◽  
pp. 2923-2929
Author(s):  
Shiki OKAMOTO ◽  
Kazumi TSUNODA ◽  
Eiji OKADA ◽  
Junichi FUJITA
Keyword(s):  
Circular Cylinder ◽  
Finite Length ◽  
Ground Plane ◽  
Near Wake

scholarly journals Dynamics of the Tip Vortices in the Wake Behind a Circular Cylinder of Finite Length

2020 ◽  
Vol 328 ◽  
pp. 05008
Author(s):  
Václav Uruba ◽  
Pavel Procházka
Keyword(s):  
Circular Cylinder ◽  
Finite Length ◽  
Ground Plane ◽  
Cross Flow ◽  
Cylinder Axis ◽  
Thin Boundary Layer ◽  
Time Resolved ◽  
Vortical Structures ◽  
Tip Vortices ◽  
Piv Technique

The dynamics of the tip vortices in the wake behind a wall-mounted finite-length circular cylinder of the aspect ratio 2 was studied experimentally using time resolved stereo PIV technique. The cylinder was mounted normal to a ground plane and it was subjected to a cross-flow with thin boundary layer developed on the wall, the Reynolds number based on inflow velocity and cylinder diameter was 9.7 thousands. The dynamics of tip vortices were analysed using the POD method applied to the plane perpendicular to the flow close to the cylinder. Besides the decaying power spectrum, slower that the Kolmogorov-type one, the two distinct frequencies were detected on Strouhal numbers 0.09 and 0.15. These frequencies could be linked to the vortical structures dynamics in the wake. The frequency Sh = 0.15 corresponds to predominantly spanwise vortices dynamics with anti-symmetrical patterns with respect to the cylinder axis, while the frequency Sh = 0.09 corresponds to mainly streamwise vortical structures dynamics with symmetrical patterns respectively. Thus, the von Kármán vortex street was detected on Strouhal frequency 0.15.

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