Journal ArticleDOI
Controlled flow over a finite square cylinder using suction and blowing
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TLDR
In this article, the effect of the aspect ratio (AR) on the shedding of large-scale vortical structures was investigated with the aid of direct numerical simulations and the results showed that, independent of AR, both blowing and suction have the potential to reduce the time-mean forces (e.g. more than 90% pressure drag reduction), fluctuating forces and vortex shedding frequency.About:
This article is published in International Journal of Mechanical Sciences.The article was published on 2019-06-01. It has received 26 citations till now. The article focuses on the topics: Vortex shedding & Secondary flow.read more
Citations
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Journal Article
Large Eddy Simulation of Turbulent Flow for Wall Mounted Cantilever Cylinders of Aspect Ratio 6 and 10
TL;DR: The flow structure around wall mounted circular cylinders of finite heights is numerically investigated via large eddy simulation (LES) and regular vortex shedding is found in the wake of the higher aspect ratio case as was anticipated, along with a strong downwash originating from the flow over the free end of the cylinder.
Journal Article
Effects of cylinder Reynolds number on the turbulent horseshoe vortex system and near wake of a surface-mounted circular cylinder
TL;DR: In this article, the results of eddy-resolving simulations and supporting flow visualizations are investigated for the turbulent horseshoe vortex (HV) system and the near-wake flow past a circular cylinder mounted on a flat bed in an open channel.
Journal ArticleDOI
The wake of a wall-mounted rectangular cylinder: Cross-sectional aspect ratio effect
TL;DR: In this article, the authors explored the dependence of the wake dynamics on the prism cross-sectional aspect ratio of a wall-mounted finite-length rectangular prism at a Reynolds number Re −1−1.
Journal ArticleDOI
Control of flow and heat transfer over two inline square cylinders
TL;DR: In this article, a finite-volume code based on a collocated grid arrangement is employed in the two-dimensional numerical simulations of two inline square cylinders under an active flow control (uniform blowing and suction).
Journal ArticleDOI
Effects of oncoming flow turbulence on the near wake and forces of a 3D square cylinder
TL;DR: In this paper, the effects of turbulence intensity on the aerodynamic forces and near wake of a 3D square cylinder with a height-to-width ratio (H/d) of 5 were experimentally studied in a low-speed wind tunnel at a Reynolds number of 34-×-104.
References
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Journal ArticleDOI
On the identification of a vortex
Jinhee Jeong,Fazle Hussain +1 more
TL;DR: In this article, the authors propose a definition of vortex in an incompressible flow in terms of the eigenvalues of the symmetric tensor, which captures the pressure minimum in a plane perpendicular to the vortex axis at high Reynolds numbers, and also accurately defines vortex cores at low Reynolds numbers.
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Control of Flow Over a Bluff Body
TL;DR: In this paper, the authors present control methods for flow over a bluff body such as a circular cylinder, a 2D bluff body with a blunt trailing edge, and a sphere.
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Low-Reynolds-number flow around a square cylinder at incidence: study of blockage, onset of vortex shedding and outlet boundary condition
TL;DR: In this paper, an incompressible SIMPLEC code is used with a non-staggered grid arrangement for the convective terms and the time discretization is implicit and a second-order Crank-Nicolson scheme is employed.
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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.
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Heat and fluid flow across a square cylinder in the two-dimensional laminar flow regime
Atul Sharma,Vinayak Eswaran +1 more
TL;DR: In this paper, the flow structure and heat transfer characteristics of an isolated square cylinder in cross flow are investigated numerically for both steady and unsteady periodic laminar flow in the two-dimensional regime, for Reynolds numbers of 1 to 160 and a Prandtl number of 0.7.