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Flow Characteristics Behind Rectangular Cylinder Placed Near a Wall
M. Kumaran,S. Vengadesan +1 more
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In this paper, a three-dimensional unsteady flow over a bluff body located parallel to a wall, kept at different gap height from the wall, has been studied numerically.Abstract:
Three-dimensional unsteady flow over a bluff body located parallel to a wall, kept at different gap height from the wall, has been studied numerically. The bluff body considered is a rectangular cylinder with two different aspect ratios, B/D = 1 and B/D = 2, where B and D are the width and height of the cylinder, respectively. The flow is considered as a laminar flow, and the Reynolds number based on the height of the cylinder cross section and oncoming reference velocity is 450. Numerical study is carried out by varying the distance of the cylinder from the wall, and the development of the vortex shedding phenomenon under the influence of the wall is investigated. From previous experiments, it is observed that as the distance between the wall and the cylinder decreases, the wake behind the cylinder becomes stationary and the vortex shedding is suppressed. The present numerical study confirms a similar trend. Periodic activity in the downstream of the flow is disturbed completely with decreasing gap betwe...read more
Citations
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Interference effect of two equal-sized square cylinders in tandem arrangement: With planar shear flow
A. Lankadasu,S. Vengadesan +1 more
TL;DR: In this paper, the effect of L/d ratio and the shear parameter has been studied for flow past two equal-sized square cylinders in tandem arrangement subjected to incoming planar shear flow.
Journal ArticleDOI
Literature Survey of Numerical Heat Transfer (2000–2009): Part II
TL;DR: A comprehensive survey of the literature in the area of numerical heat transfer (NHT) published between 2000 and 2009 has been conducted by as mentioned in this paper, where the authors conducted a comprehensive survey.
Journal ArticleDOI
Onset of vortex shedding in planar shear flow past a square cylinder
A. Lankadasu,S. Vengadesan +1 more
TL;DR: In this article, the influence of shear on the onset of periodic time dependent flow is observed using time varying lift coefficient, and the mean drag coefficient decreases either with increasing shear for a particular Reynolds number or with increasing Reynolds number for a specific shear parameter.
Journal ArticleDOI
Steady and Pulsating Flow Past a Heated Rectangular Cylinder(s) in a Channel
Ashish Saxena,Eddie Y. K. Ng +1 more
TL;DR: In this paper, the effect of laminar steady (Re=100, Pr=0.74) and pulsating flow (4 Hz and amplitude 0.4) on a centrally located heated rectangular cylinder of varyi...
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Effect of a wall on the wake dynamics of an infinite square cylinder
M. Samani,Donald J. Bergstrom +1 more
TL;DR: In this article, the influence of a solid wall on the wake structure of an infinite cylinder of square cross-section when placed in proximity to the wall was investigated, and three different values of the gap ratio were considered, i.e. g/D = 0, 0.5 and 1, in addition to the reference case of a cylinder in a free stream with no wall.
References
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Journal ArticleDOI
Calculating three-dimensional flows around structures and over rough terrain☆
TL;DR: In this paper, a computing technique for low-speed fluid dynamics has been developed for the calculation of three-dimensional flows in the vicinity of one or more block-type structures, where the full time-dependent Navier-Stokes equations are solved with a finite-difference scheme based on the Marker-and-Cell method.
Journal ArticleDOI
A numerical study of vortex shedding from rectangles
R. W. Davis,E. F. Moore +1 more
TL;DR: In this article, the authors present numerical solutions for two-dimensional time-dependent flow about rectangles in infinite domains using the third-order upwind differencing for convection and a Leith type of temporal differencings.
Journal ArticleDOI
Simulation of three-dimensional flow around a square cylinder at moderate Reynolds numbers
TL;DR: In this article, an implicit fractional step method finite-volume code with second-order accuracy in space and time was used to simulate 2D and 3D shedding flow around a square cylinder for moderate Reynolds numbers.
Journal ArticleDOI
Three-dimensional floquet instability of the wake of square cylinder
TL;DR: In this paper, the authors investigated the onset of three-dimensionalality in an otherwise two-dimensional periodic wake of a square cylinder and employed the Floquet stability analysis to extract the different modes of 3D instabilities.
Journal ArticleDOI
Re-examination of the effect of a plane boundary on force and vortex shedding of a circular cylinder
TL;DR: In this article, the effects of the bed proximity, the thickness of the boundary layer, and the velocity gradient on the pressure distribution, the hydrodynamic forces and the vortex shedding behavior were examined.
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