A numerical study of vortex shedding from rectangles

Davis, Ronald W.; Moore, E. F.

doi:10.1017/s0022112082000561

Cited by 349 publications

(141 citation statements)

References 15 publications

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“…3 and 4, respectively. Some numerical results of Davis and Moore [24], Franke et al [25], Sohankar et al [26], Robichuax et al [27] and Saha et al [28] are also plotted in the figure for comparison. It is seen that the present calculation for the mean drag coefficient at Re = 250 is very close to the experimental data of Shimizu and Tanida [22].…”

Section: Computer Code Validationmentioning

confidence: 99%

Numerical simulation of flow past rectangular cylinders with different aspect ratios using the incompressible lattice Boltzmann method

et al. 2012

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This paper presents a numerical study of a uniform flow past a rectangular cylinder using the incompressible lattice Boltzmann method (ILBM). Firstly, we use the ILBM to simulate the flow past a square cylinder symmetrically placed in a two-dimensional channel and results are validated against the well-resolved results obtained using finite-difference method and finite-volume method. Secondly, the effects of the aspect ratio defined as R = width/height on the fluid forces, vortex shedding frequency and the flow structures in the wake are investigated. Aspect ratios ranging from 0.15 to 4.00 and four Reynolds numbers Re = 100, 150, 200 and 250 are selected for the investigation. The results show that the effects of aspect ratio on physical quantities such as drag and lift coefficients, Strouhal number and the vortex shedding mechanism are very notable in the range between 0 and 2. In general, the drag coefficient decreases with the aspect ratio and the decreasing rate is more distinct in the range of 0.15 ≤ R ≤ 2.0. There is no local maximum found at around R = 0.6 in the drag coefficient as reported for higher Reynolds numbers in the literature. However the root-mean-square value of the lift coefficient shows a maximum value at R ≈ 0.5 for all Reynolds numbers selected. The variation of Strouhal number with R appears to be different for four selected Reynolds numbers. Especially for Re = 250, a discontinuity in St, as has been observed for higher Reynolds numbers, is observed at around R = 1.45 where multiple peaks are found in the result of Fourier spectrum analysis of the lift force and irregular vortex shedding behavior with no fixed shedding frequency is observed from the instantaneous vorticity contours. Such discontinuity is not observed for Re = 100, 150 and 200. The present results using the LBM are compared with some existing experimental data and numerical studies. The comparison shows that the LBM can capture the characteristics of the bluff body flow well and is a useful tool for bluff body flow studies.

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Section: Computer Code Validationmentioning

confidence: 99%

Numerical simulation of flow past rectangular cylinders with different aspect ratios using the incompressible lattice Boltzmann method

et al. 2012

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“…In contrast to the inviscid scheme utilized in the previous simulation, a finite difference method (Davis and Moore, [1982]; Davis et al, [1984]) was employed here to study the motions of the particles for various Stokes numbers at a flow Reynolds number of 100. The results are shown in Figure 3 for St = 0.01, 1.0, and 10.0.…”

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confidence: 99%

A Turbulent Flow without Particle Mixing

Crowe

Troutt

Chung

et al. 1995

Aerosol Science and Technology

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“…The higher order scheme of WAM is the second order leapfrog scheme (which has zero numerical diffusion). The higher order scheme of WW3 is the "ULTIMATE QUICKEST" scheme and limiter (see Tolman, 1995;Leonard, 1979;Davis andMoore, 1982, andLeonard, 1991). The QUICKEST scheme is third order when solved in one dimension.…”

Section: Improved Numerical Schemes For Propagation On a Gridmentioning

confidence: 99%

Wave modelling – The state of the art

Cavaleri¹,

Alves²,

Ardhuin³

et al. 2007

Progress in Oceanography

461

177

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This paper is the product of the wave modelling community and it tries to make a picture of the present situation in this branch of science, exploring the previous and the most recent results and looking ahead towards the solution of the problems we presently face. Both theory and applications are considered.The many faces of the subject imply separate discussions. This is reflected into the single sections, seven of them, each dealing with a specific topic, the whole providing a broad and solid overview of the present state of the art. After an introduction framing the problem and the approach we followed, we deal in sequence with the following subjects: (Section) 2, generation by wind; 3, non-linear interactions in deep water; 4, white-capping dissipation; 5, non-linear interactions in shallow water; 6, dissipation at the sea bottom; 7, wave propagation; 8, numerics. The two final sections, 9 and 10, summarize the present situation from a general point of view and try to look at the future developments. Keywords

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A numerical study of vortex shedding from rectangles

Cited by 349 publications

References 15 publications

Numerical simulation of flow past rectangular cylinders with different aspect ratios using the incompressible lattice Boltzmann method

Numerical simulation of flow past rectangular cylinders with different aspect ratios using the incompressible lattice Boltzmann method

A Turbulent Flow without Particle Mixing

Wave modelling – The state of the art

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