Dynamic behavior of flow around rows of square cylinders kept in staggered arrangement

Chatterjee, Dipankar; Biswas, Gautam

doi:10.1016/j.jweia.2014.10.019

Cited by 35 publications

(16 citation statements)

References 33 publications

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“…The shedding pattern behind the cylinders shows some in-phase and some anti-phase characteristics. Qualitatively, the flow behavior is in good agreement with the results obtained numerically by Chatterjee and Biswas [ 16 ] for flow past two staggered rows of square cylinders. This can be further revealed from the power spectra analysis of lift coefficients presented in Fig 8(a)–8(p) , where S ts = 0.3047 and 0.3006 for (R e , g) = (75, 6) of C 23 and C 24 , respectively (where subscript ‘s’ denotes secondary).…”

Section: Resultssupporting

confidence: 87%

“…Williamson [ 35 ] found experimentally the anti-phase vortex shedding flow pattern for two circular cylinders at (R e , g) = (100, 3). Chatterjee and Biswas [ 16 ] also had similar numerical observations. The time history analysis of drag and lift coefficients are given in Fig 7(a)–7(p) .…”

Section: Resultsmentioning

confidence: 53%

“…[ 15 ] examined the effect of Reynolds number on flow past four square cylinders in an inline square configuration and discussed in detail the observed flow patterns. Chatterjee and Biswas [ 16 ] reported the chaotic and synchronous flow patterns at 1 ≤ g ≤ 5 for a fixed Reynolds number of 100. They argued that these flow patterns are the results of primary vortex shedding frequency and secondary cylinder interaction frequency for flow around two rows of staggered cylinders using Finite volume based computational fluid dynamics (CFD) solver using PISO algorithm.…”

Section: Introductionmentioning

confidence: 99%

“…This study aims to partially fill this gap in literature. Chatterjee and Biswas [ 16 ] have investigated the different flow patterns and there study is limited to a single Reynolds number and fixed the stream-wise gap spacing between the cylinders. The main goal of the present study is to systematically investigate the different flow patterns by changing the Reynolds number.…”

Section: Introductionmentioning

confidence: 99%

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Transitions in the flow patterns and aerodynamic characteristics of the flow around staggered rows of cylinders

et al. 2017

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A two-dimensional numerical study of flow across rows of identical square cylinders arranged in staggered fashion is carried out. This study will unreveal complex flow physics depending upon the Reynolds number (Re) and gap spacing (g) between the cylinders. The combined effect of Reynolds number and gap spacing on the flow physics around staggered rows of cylinders are numerically studied for 20 ≤ Re ≤ 140 and 1 ≤ g ≤ 6. We use the lattice Boltzmann method for numerical computations. It is found that with increase in gap spacing between the cylinders the critical Reynolds number for the onset of vortex shedding also increases. We observed a strong effect of Reynolds number at g = 2 and 4. Secondary cylinder interaction frequency disappears for large Reynolds number at g = 6 and 5 and the flow around cylinders are fully dominated by the primary vortex shedding frequency. This ensures that at large gap spacing with an increase in the Reynolds number the wakes interaction between and behind the cylinders is weaken. Furthermore, it also ensures that the wake interaction behind the cylinders is strongly influenced by the jets in the gap spacing between the cylinders. We also found that g = 2 is the critical gap spacing for flow across rows of staggered square cylinders for the considered range of Reynolds number. Depending on the Reynolds number we observed; synchronous, quasi-periodic-I, quasi-periodic-II, and chaotic flow patterns. In synchronous flow pattern, an in-phase and anti-phase characteristics of consecutive cylinders has been observed. The important physical parameters are also analyzed and discussed in detail.

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Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Transitions in the flow patterns and aerodynamic characteristics of the flow around staggered rows of cylinders

et al. 2017

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“…On the other hand, studies on bluff bodies with multiple square cylinders (Liu and Chen, 2002;Yen and Liu, 2011;Alam et al, 2011;Burattini and Agrawal, 2013;Han et al, 2014;Chatterjee and Biswas, 2015) or flat plates has received little attention even though most structures around us are slender structures with quadrilateral cross sections. Especially, a limited number of studies on the flow around multiple flat plates have been reported (Hirano et al, 1983;Williamson, 1985;Hayashi et al, 1986;Miau et al, 1992;Higuchi et al, 1994;Hacisevki and Teimourian, 2015;Teimourian et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Effect of Gap Ratio on the Wake behind Two Side-by-Side Flat Plates

Shin

Kondo

2019

JAFM

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The flow behind two flat plates placed normal to the flow in side-by-side arrangement was experimentally investigated by varying the gap ratio G * (the ratio of gap spacing to plate width) in the range of 0.0 ≤ G * ≤ 2.5 to examine the effect of gap ratio on the wake. The flow patterns around the plates were observed using the hydrogen bubble flow visualization in the water tunnel. Velocity and pressure components were acquired by employing hot-wire anemometers and digital manometers in the wind tunnel. From the experiment, it has been found that, at gap ratios less than 1.6, the gap flow was biased either upward or downward and maintained a stable biased flow pattern. The width of the wake on the biased side was increased with the gap ratio, while that on the unbiased side was decreased. At 1.6 ≤ G * < 2.0, the switching of the biased gap flow appeared due to the flow instability by mutual interference of the vortex shedding from the plates, while at G * of 2.0 or more, the gap flow was no longer biased. The plates on the biased side showed relatively low base pressure and high velocity, and detected periodic vortex shedding, while those on the unbiased side showed the opposite phenomena. At gap ratios less than 2.0, two Strouhal numbers indicating the bi-stable situation exist, and the difference between the two Strouhal numbers decreased with the gap ratio.

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A Critical Review of Heat Transfer Characteristic Using Nanofluid Flow Around a Set of 2D Cylinder Arrangements?

et al. 2018

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Dynamic behavior of flow around rows of square cylinders kept in staggered arrangement

Cited by 35 publications

References 33 publications

Transitions in the flow patterns and aerodynamic characteristics of the flow around staggered rows of cylinders

Transitions in the flow patterns and aerodynamic characteristics of the flow around staggered rows of cylinders

Effect of Gap Ratio on the Wake behind Two Side-by-Side Flat Plates

A Critical Review of Heat Transfer Characteristic Using Nanofluid Flow Around a Set of 2D Cylinder Arrangements?

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