Steady flow past a vertical surface-piercing circular cylinder

2003 ◽  
Vol 18 (3-4) ◽  
pp. 271-285 ◽  
Author(s):  
J.R. Chaplin ◽  
P. Teigen
Keyword(s):  
Circular Cylinder ◽  
Steady Flow ◽  
Vertical Surface ◽  
Flow Past

Oscillatory flow past a circular cylinder in a rotating frame

1997 ◽  
Vol 345 ◽  
pp. 101-131
Author(s):  
M. D. KUNKA ◽  
M. R. FOSTER
Keyword(s):  
Circular Cylinder ◽  
Steady Flow ◽  
Stagnation Point ◽  
Oscillatory Flow ◽  
Numerical Solutions ◽  
Initial Conditions ◽  
Temporal Integration ◽  
Oncoming Flow ◽  
Flow Past ◽  
Rear Stagnation Point

Because of the importance of oscillatory components in the oncoming flow at certain oceanic topographic features, we investigate the oscillatory flow past a circular cylinder in an homogeneous rotating fluid. When the oncoming flow is non-reversing, and for relatively low-frequency oscillations, the modifications to the equivalent steady flow arise principally in the ‘quarter layer’ on the surface of the cylinder. An incipient-separation criterion is found as a limitation on the magnitude of the Rossby number, as in the steady-flow case. We present exact solutions for a number of asymptotic cases, at both large frequency and small nonlinearity. We also report numerical solutions of the nonlinear quarter-layer equation for a range of parameters, obtained by a temporal integration. Near the rear stagnation point of the cylinder, we find a generalized velocity ‘plateau’ similar to that of the steady-flow problem, in which all harmonics of the free-stream oscillation may be present. Further, we determine that, for certain initial conditions, the boundary-layer flow develops a finite-time singularity in the neighbourhood of the rear stagnation point.

Steady flow past a circular cylinder under large blockage

2021 ◽  
Vol 87 ◽  
pp. 135-150
Author(s):  
Shravan Kumar Mishra ◽  
Subhankar Sen ◽  
Akhil Verma
Keyword(s):  
Circular Cylinder ◽  
Steady Flow ◽  
Flow Past

Simulation of Two-Phase Flow Past a Vertical Surface-Piercing Circular Cylinder

2010 ◽  
Author(s):  
Frederick Stern ◽  
Jianming Yang ◽  
Jungsoo Suh ◽  
Bonguk Koo
Keyword(s):  
Circular Cylinder ◽  
Vortex Shedding ◽  
Transverse Velocity ◽  
Vertical Surface ◽  
Small Scale ◽  
Streamwise Vorticity ◽  
Two Phase ◽  
Flow Past ◽  
Curvilinear Grid ◽  
The Difference

Large-eddy simulation of the flow past a surface-piercing circular cylinder is performed to investigate the effects of Reynolds and Froude numbers using a high fidelity orthogonal curvilinear grid solver. The present study extends and supports the conclusions of the precursory work for medium Reynolds and Froude numbers. Organized periodic vortex shedding is observed in deep flow. At the interface, the organized periodic vortex shedding is attenuated and replaced by small-scale vortices. The streamwise vorticity and outward transverse velocity generated at the edge of the separated region cause the weakened vortex shedding at the interface. The main source of the streamwise vorticity and the outward transverse velocity at the interface is the lateral gradient of the difference between the vertical and transverse Reynolds normal stresses.

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