Numerical simulation of flow around rectangular cylinders

Okajima, Atsushi

doi:10.1016/0167-6105(90)90033-9

Cited by 110 publications

(43 citation statements)

References 1 publication

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“…Compared to the studies on the aerodynamic characteristics of the circular cylinder, there are fewer studies on the rectangular cylinder [13] [14] and the semi-circular cylinder [15]. Furthermore, there are much fewer studies on the aeroacoustics than those of aerodynamics of these cylinders.…”

Section: Introductionmentioning

confidence: 99%

Aeolian Tone from a Semi-Circular Cylinder in a Stream

Yamagata

Saito

Fujisawa

2016

JFCMV

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Aeolian tone from a semi-circular cylinder in a uniform flow is studied experimentally for various angles of attack. It is found that the peak sound spectrum of the Aeolian tone from the semi-circular cylinder is smaller than that from the circular cylinder and the lowest sound is observed around the zero angle of attack. This is due to the reduction in the fluctuating lift force on the semi-circular cylinder compared to that of the circular cylinder. This result suggests the validity of the analogy between the sound pressure level and the fluctuating lift force on a semi-circular cylinder in a stream. The flow visualization study also supports these results.

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Section: Introductionmentioning

confidence: 99%

Aeolian Tone from a Semi-Circular Cylinder in a Stream

Yamagata

Saito

Fujisawa

2016

JFCMV

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“…The values obtained for the average C D , for the (half-)amplitude of C L and for St are shown in Table III along with the CFD results reported by Okajima [23] for the same Re (these values of C D and of DC L are only approximate, as they were taken from figures; besides, the value DC L :1.85 attributed to Okajima [23] is half of the peak-to-peak amplitude of the lift fluctuations presented therein, which are rather regular but do not present zero mean).…”

Section: Fixed Conditionsmentioning

confidence: 94%

“…In fact, wind tunnel tests reveal that this section is prone to torsional flutter, which is a phenomenon often encountered in testing bridge decks. The value of Re=500 was adopted because it is attainable (with program ESBFI and with the hardware available) with a reasonable computer runtime and because there exist in the literature several CFD analysis of this section at such Re and for fixed conditions (Okajima [23] and Okajima et al [39,40]). …”

Section: Example 2: Rectangular Cylinder At Re=500mentioning

confidence: 99%

“…The prescribed values t0 i are evaluated by assuming a zero gradient of boundary tractions [14,17,23]. Regarding the prescribed flow velocities, it is convenient to consider two distinct parts in boundary G u -the contour G c of the immersed body, in which the no-slip condition is imposed, and all the remaining portion of G u , which is denoted by G g and consists on the inlet and side boundaries of the domain.…”

Section: Numerical Solution Of the Ns Equationsmentioning

confidence: 99%

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Analysis of fluid-structure interaction by an arbitrary Lagrangian-Eulerian finite element formulation

Mendes¹,

Branco²

1999

Int. J. Numer. Meth. Fluids

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“…Studies on the problems of wake development and vortex shedding behind a rectangular/square cylinder in free-stream flows was investigated both numerically and experimentally among others by, Franke (1991), Franke et al (1990), Kelkar and Patankar (1992), Davis and Moore (1982), Davis et al (1984), Okajima (1982Okajima ( , 1990, Okajima et al (1992), Mukhopadhyay et al (1992), Suzuki et al (1993) and Sohankar et al (1998Sohankar et al ( , 1999.…”

Section: Introductionmentioning

confidence: 99%

A numerical investigation of wake and mixing layer interactions of flow past a square cylinder

Mushyam

Bergadà

2016

Meccanica

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Aquesta és una còpia de la versió author's final draft d'un article publicat a la revista Meccanica.La publicació final està disponible a Springer a través de http://dx.doi.org/10.1007/s11012-016-0400-8 This is a copy of the author 's final draft version of an article published in the journal Meccanica. Abstract:The aim of the present study is to simulate and analyze the interaction of two dimensional flow past a square cylinder in a laminar regime with an upstream mixing layer developed by an axis symmetrical horizontal splitter plate. The mixing layer is generated upstream of the square cylinder by mixing two uniform streams of fluid with different velocities above and below the splitter plate. A range of upstream domain lengths, distances between the splitter plate and the square cylinder, and upstream velocity ratios between the two streams of fluid are analyzed. Unconfined flow over a square cylinder placed in uniform upstream flow is initially analyzed as it plays a crucial role in understanding the properties of the wake. The results are compared with the existing literature to validate the code developed and they are found to be in very good agreement. It is observed from the present study that at smaller velocity ratios, the vortices shed into the wake consist of both clockwise and anticlockwise moment vortices. As velocity ratio is increased only clockwise moment vortices are shed downstream and anticlockwise vortices are shed as Kelvin-Helmholtz instabilities. In all simulations undertaken the same phenomena is observed independent of the upstream Reynolds number, indicating that velocity ratio is a primary parameter influencing the flow. Different instability modes were observed and they were highly dependent on the upstream velocity ratio.

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Numerical simulation of flow around rectangular cylinders

Cited by 110 publications

References 1 publication

Aeolian Tone from a Semi-Circular Cylinder in a Stream

Aeolian Tone from a Semi-Circular Cylinder in a Stream

Analysis of fluid-structure interaction by an arbitrary Lagrangian-Eulerian finite element formulation

A numerical investigation of wake and mixing layer interactions of flow past a square cylinder

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