Experimental Investigation of Flow Past a Square Cylinder at an Angle of Incidence

Dutta, Sushanta; Panigrahi, Pradipta Kumar; Muralidhar, K.

doi:10.1061/(asce)0733-9399(2008)134:9(788)

Cited by 84 publications

(46 citation statements)

References 25 publications

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“…They studied flow around rectangular cylinder for the blockage coefficient of 1/8 and by two different methods of finite volume method (FVM) and latticeboltzmann method (LBM). The experimental studies of Dutta et al [10] has verified the results of Breuer et al [1] and showed that beyond the Reynolds number of 200 aspect ratio of cylinder has to be taken into account due to the formation of 3D structures. One of the most recent studies in this field has been carried out by Berrone et al [11] by means of adaptive finite element method (AFEM) and FVM for aspect ratios of 1 to 5 and Reynolds numbers of 100, 400 and 1000.…”

Section: Introductionmentioning

confidence: 65%

“…In the case of unsteady flow around the diamondshaped obstacle, an important quantity has to be taken into account and that is the Strouhal number (St) which is computed based on the hydraulic diameter of the cylinder, the frequency of the vortex shedding and the inlet velocity inlet fD St u  (10) In order to measure the frequency of vortex shedding , a spectral analysis based on fast Fourier transformation, FFT, has been performed on the time series of oscillating lift forces and the characteristic value of f has been calculated. It was seen that the Strouhal number will increase with rising Re in the range of Re cr ≤ Re ≤ 200 which is in good agreement with the literature.…”

Section: Vortex Shedding and Strouhal Numbermentioning

confidence: 99%

“…Dutta et al [10] have experimentally studied flow past a square cylinder placed at an angle of incidence using particle image velocimetry, hot wire anemometry, and flow visualization. Data for four cylinder orientations θ=0, 22.5, 30, and 45° (diamond-shaped) and two aspect ratios of 16 and 28 have been reported.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical Simulation of Flow around Diamond-Shaped Obstacles at Low to Moderate Reynolds Numbers

Djeddi¹,

Masoudi²,

Ghadimi³

2013

AJAMS

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In this paper, viscous fluid flow over an unconventional diamond-shaped obstacle in a confined channel is simulated in low to moderate Reynolds numbers. The diamond-shaped obstacle is altered geometrically in order to represent different blockage coefficients based on the channel height and different aspect ratios based on the length to height ratios of the obstacle. An in-house finite difference Navier-Stokes solver using staggered grid arrangement and Chorin's projection method is developed for the simulation of the laminar viscous flow. The numerical solver is validated against numerical results that are presented in the literature for the flow over rectangular cylinders and good agreement is observed. Grid resolution has been studied within a mesh convergence test and as a result, suitable grid dimension is achieved. A series of simulations have been carried out for each set of geometry and configuration in order to find the critical Reynolds number for each case in which the vortex shedding will occur. Therefore, simulations are divided into two groups of steady and unsteady flows. In the case of unsteady flow, nondimensional Strouhal Number (St) is investigated and results prove the dependency of St on the blockage coefficient and aspect ratio. It is shown that the Strouhal number will increase with the rise of blockage ratio and the local maximum of St will occur at lower Re for geometries with lower aspect ratios (bluff bodies) than geometries with higher aspect ratios, i.e. with more streamlined bodies.

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Section: Introductionmentioning

confidence: 65%

Section: Vortex Shedding and Strouhal Numbermentioning

confidence: 99%

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Numerical Simulation of Flow around Diamond-Shaped Obstacles at Low to Moderate Reynolds Numbers

Djeddi¹,

Masoudi²,

Ghadimi³

2013

AJAMS

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“…Dalton and Zeng [11] in 2003 numerically studied the flow past square and diamond cylinders at Reynolds numbers of 200 and 1000. Dutta, Panirgrahi and Muralidhar [12] also in 2008 experimentally studied flow around square cylinders at four angles 0, 22.5, 30, and 45 degrees and for two aspect ratios of 16 and 28. King and Pfizenmayer [13] researched the sound generated by rigid cylinders in cross flow experimentally in 2009.…”

Section: Introductionmentioning

confidence: 98%

Hydrodynamic analysis of flow around square cylinders and determination of the strouhal number as a function of angles of attack and reynolds numbers

Razughi

Ghadimi

Kermani

2013

International Journal of Scientific World

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Hydrodynamic analysis of flow around square cylinders at different inclined angles of attach ranging from 0 to 45 at low Reynolds numbers, both in water and air, has been carried out using commercial software ANSYS CFX. Twenty different square cylinders were modeled at angles 0, 5, 10, 15, 20, 25, 30, 40 & 45 degrees. Results obtained by the hydrodynamic analyses were analyzed by Eureqa software to find a relation between non dimensional parameters. Strouhal number was determined to be a function of angle of attack and 1/Re in water and air. The obtained formulas were tested at two random angles of 33 and 50 against the results of Ansys-CFX. Comparison displayed good agreement which is demonstrative of the acceptability of the obtained relationships.

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“…LaserDoppler velocimetry (LDV) was used to measure the mean and RMS streamwise velocity components. Dutta et al (2008) carried out experiments on flow past a square cylinder using particle image velocimetry, hot wire anemometry and flow visualization. The influence of cylinder orientation and aspect ratio were also presented.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of low-Reynolds-number flow past two tandem square cylinders with varying incident angles of the downstream one using a CIP-based model

et al. 2016

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Experimental Investigation of Flow Past a Square Cylinder at an Angle of Incidence

Cited by 84 publications

References 25 publications

Numerical Simulation of Flow around Diamond-Shaped Obstacles at Low to Moderate Reynolds Numbers

Numerical Simulation of Flow around Diamond-Shaped Obstacles at Low to Moderate Reynolds Numbers

Hydrodynamic analysis of flow around square cylinders and determination of the strouhal number as a function of angles of attack and reynolds numbers

Numerical study of low-Reynolds-number flow past two tandem square cylinders with varying incident angles of the downstream one using a CIP-based model

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