Simulation of the Flow Over Elliptic Airfoils Oscillating at Large Angles of Attack

Akbari, M.H.; Price, S.J.

doi:10.1006/jfls.2000.0297

Cited by 20 publications

(10 citation statements)

References 17 publications

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“…These boundary values are calculated at the cylinder surface by integrating the desired normal velocity, which for fixed cylinders is zero. A full description of the method is given by Akbari (1999) and Akbari and Price (2000).…”

Section: Numerical Approachmentioning

confidence: 99%

Numerical investigation of flow patterns for staggered cylinder pairs in cross-flow

Akbari

Price

2005

Journal of Fluids and Structures

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Section: Numerical Approachmentioning

confidence: 99%

Numerical investigation of flow patterns for staggered cylinder pairs in cross-flow

Akbari

Price

2005

Journal of Fluids and Structures

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“…(2) and (3) are solved sequentially. The numerical algorithm implemented to solve these equations is based on a vortex method described in detail by Akbari and Price [26,27] and Bahmani and Akbari [28], and are not presented here for the sake of brevity. In the present vortex method, a computational grid is used for the following purposes: (a) solving the Poisson equation for the stream-function given the vorticity field, (b) calculating the velocity field given the streamfunction, and (c) solving the diffusion equation for the vorticity field.…”

Section: Numerical Approachmentioning

confidence: 99%

Response characteristics of a vortex-excited circular cylinder in laminar flow

Bahmani

Akbari

2011

J Mech Sci Technol

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This paper presents numerical simulation results for vortex-induced vibration of a circular cylinder in laminar flow. A vortex method is implemented to solve the two-dimensional Navier-Stokes equations in terms of vorticity. In order to validate the numerical code, the flow past a fixed cylinder is first investigated for which enough experimental and numerical results are available. Basic characteristics of the dynamic response and vortex shedding for an elastically mounted circular cylinder are then investigated for 70 < Re < 170. The lock-in phenomenon is captured at certain reduced velocities where the lift coefficient takes a considerable value associated with a high amplitude response. The wake structure exhibits the 2S or C (2S) modes of vortex shedding in this range of Reynolds numbers, as opposed to the 2P mode which is observed in the turbulent flow regime. The numerical results are in acceptable agreement with available experimental and numerical data.

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“…The numerical algorithm implemented here is based on a vortex method previously developed by Akbari (1999) and Akbari & Price (2000, 2005. Full details of the method are given in these references; however, for completeness a brief summary is presented in the remainder of this section.…”

Section: Numerical Approachmentioning

confidence: 99%

“…(3) and (4) are solved sequentially, rather than simultaneously. Equation (3) states that the "total derivative" of vorticity is zero, or that the vorticity of a fluid particle is conserved. A unique solution to Eq.…”

Section: Numerical Approachmentioning

confidence: 99%

Wake Synchronization for a Pair of Staggered Cylinders in Cross-Flow with the Upstream Cylinder in Transverse Oscillation

Akbari

Price

2010

Engineering Applications of Computational Fluid Mechanics

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Numerical simulations are presented for the cross-flow over two staggered circular cylinders in the low subcritical Reynolds number regime with Re =1500, with the upstream of the two cylinders subject to a transverse harmonic oscillation. A vortex method is implemented for the solution of the unsteady two-dimensional Navier-Stokes equations. The effect of varying the frequency of oscillation of the upstream cylinder, with fixed amplitude of oscillation, is investigated. The numerical flow visualization results reveal a synchronization of the wake structure with the oscillating cylinder for different ranges of the excitation frequency. Four distinct synchronization modes are identified, and are compared with available experimental data.

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Simulation of the Flow Over Elliptic Airfoils Oscillating at Large Angles of Attack

Cited by 20 publications

References 17 publications

Numerical investigation of flow patterns for staggered cylinder pairs in cross-flow

Numerical investigation of flow patterns for staggered cylinder pairs in cross-flow

Response characteristics of a vortex-excited circular cylinder in laminar flow

Wake Synchronization for a Pair of Staggered Cylinders in Cross-Flow with the Upstream Cylinder in Transverse Oscillation

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