Triggering vortex shedding for flow past circular cylinder by acting on initial conditions: A numerical study

Laroussi, Mouna; Djebbi, Mohamed Amine; Moussa, Mohamed

doi:10.1016/j.compfluid.2014.05.034

Cited by 26 publications

(12 citation statements)

References 44 publications

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“…This is also a good example of a non-graded mesh with a jump of three levels between neighbor cells for the highest resolution. -0 .20 Braza et al [9] 0.16 0.20 Mahir et al [40] 0.172 0.192 Laroussi et al [34] 0.173 0.199 Muddada et al [50] 0.170 -Present 0.172 0.203 where X 0 = 0.7957D (with D = 2r) is the amplitude of the oscillation. We enforce Dirichlet boundary conditions on the edge of the computational domain and set Re = 100 and KC = 5.…”

Section: Oscillating Cylindermentioning

confidence: 97%

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A stable projection method for the incompressible Navier–Stokes equations on arbitrary geometries and adaptive Quad/Octrees

Guittet

Theillard

Gibou

2015

Journal of Computational Physics

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Section: Oscillating Cylindermentioning

confidence: 97%

“…The values for the drag and lift coefficients on the sphere, together with the Strouhal number, have been tabulated through numerical simulations in the literature, for example in [51,9,11,34].…”

Section: Karman Vortex Streetmentioning

confidence: 99%

A stable projection method for the incompressible Navier–Stokes equations on arbitrary geometries and adaptive Quad/Octrees

Guittet

Theillard

Gibou

2015

Journal of Computational Physics

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“…The flow instability is caused by the KelvinHelmholtz instability [4], which is formed when two flows of different velocities interact, Fig. 2.…”

Section: Introductionmentioning

confidence: 99%

“…2. The turbulence experienced in both of these separate flows over both sides of the cylinder causes varying velocities, which generates the formation of this instability when these velocities interact in the wake flow [4].…”

Section: Introductionmentioning

confidence: 99%

Flow Control Through Vortex Shedding Interaction of One Cylinder Downstream of Another

Payton¹

2017

GEOMATE

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This study investigates the vortices produced between two 2d cylinders, and the relationship between the structures of the vortices produced at both cylinders when one is placed in the wake flow of another. CFD simulations using ANSYS Fluent were used to determine the coefficients of lift and drag, as well as the frequency of vortex shedding and size of vortices at three separate Reynolds numbers of 16000, 32000 and 65000 in different arrangements. Each arrangement of cylinders was compared against controls, which consisted of a single cylinder to determine the alteration of forces produced. Two trip wires at 7 different angles of 40, 45, 50, 55, 60, 65, and 70 degrees were then investigated at a Reynolds number of 65000 which was compared to the smooth cylinder control forces and frequency of vortex shedding. The most optimum angle of trip wires was then combined with linear cylinder arrangements also at a Reynolds number of 65000 for comparison with only the upstream cylinder utilizing the trip wires.

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“…Recently, Kostecki (2014) used random vortex method for a single cylinder involving turbulent models for high Reynolds number while Laroussi (2015) investigated the flows around two cylinders in close proximity under the influence of initial conditions using a finite element based program, at low Reynolds Numbers. Gordo (2011) on the other side, applied the method to explore the flow around airfoils using meshless methodology called full cloud vortex method.…”

Section: Introductionmentioning

confidence: 99%

Discrete Vortex Prediction of Flow around Two Cylinders in Side by Side using Simple Grid System

Wardhana¹

2017

American Journal of Engineering and Applied Sciences

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Modelling of flows around two cylinders in side by side arrangement using a simple overlapping grid system is carried out. The use of such grid system is intended to give a considerable reduction in terms of the CPU time, especially during the calculation of the vortex velocity. It has been shown that this method is not only time efficient, but also gives a better distribution of surface vorticity as the scattered vortices around the cylinder are now concentrated on grid point located at uniform distance from the cylinder. The engineering applications of this topic is to simulate the loading on structural elements due to the presence of anodes. The in-line and transverse force coefficients and the flow patterns obtained are presented in order to provide more detail description of the flow phenomena and interaction involved. The comparison of the results with both experimental and numerical evidence is also presented and the range within which the algorithm produces good results is identified.

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Triggering vortex shedding for flow past circular cylinder by acting on initial conditions: A numerical study

Cited by 26 publications

References 44 publications

A stable projection method for the incompressible Navier–Stokes equations on arbitrary geometries and adaptive Quad/Octrees

A stable projection method for the incompressible Navier–Stokes equations on arbitrary geometries and adaptive Quad/Octrees

Flow Control Through Vortex Shedding Interaction of One Cylinder Downstream of Another

Discrete Vortex Prediction of Flow around Two Cylinders in Side by Side using Simple Grid System

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