Numerical simulation of flow around rectangular prism

Yu, Dahai; Kareem, A.

doi:10.1016/s0167-6105(97)00073-1

Cited by 34 publications

(8 citation statements)

References 12 publications

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“…On the other hand, the high-Reynolds number flow (i.e. Re ≥ 1.e + 4) has been studied by means of both experimental and computational approach, with emphasis on both its dependence to chord-to-depth ratio [6,7,8] and its spanwise coherence pressure characteristics [9]. Neverthless, according to the authors, some difficulties remain in describing the complex flow phenomena that drive the fluctuating aerodynamic forces acting on such kind of cylinders.…”

Section: Introductionmentioning

confidence: 99%

3D flow around a rectangular cylinder: A computational study

Bruno

Fransos²,

Coste³

et al. 2010

Journal of Wind Engineering and Industrial Aerodynamics

160

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Section: Introductionmentioning

confidence: 99%

3D flow around a rectangular cylinder: A computational study

Bruno

Fransos²,

Coste³

et al. 2010

Journal of Wind Engineering and Industrial Aerodynamics

160

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“…In order to provide a baseline for assessing the effects of rounding the cylinder corners, we present first the results obtained for the subcritical flow around a sharp square cylinder. A further motivation for presenting these results is that this flow has already been extensively studied (e.g., Younis and Przulj [15]; Lyn et al [19]; Yu and Kareem [20]; Rodi et al [21]) and is hence suitable for validating the implementation of the turbulence-model modification into OPENFOAM. In what follows, the computational details were as given above, and the simulations were obtained for the case of Re ¼ 2 Â 10 4 .…”

Section: Resultsmentioning

confidence: 99%

Prediction of Turbulent Flow Around a Square Cylinder With Rounded Corners

Dai

Younis

Zhang

2017

Journal of Offshore Mechanics and Arctic Engineering

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Predictions are reported of the two-dimensional turbulent flow around a square cylinder with rounded corners at high Reynolds numbers. The effects of rounded corners have proved difficult to predict with conventional turbulence closures, and hence, the adoption in this study of a two-equation closure that has been specifically adapted to account for the interactions between the organized mean-flow motions due to vortex shedding and the random motions due to turbulence. The computations were performed using openfoam and were validated against the data from flows past cylinders with sharp corners. For the case of rounded corners, only the modified turbulence closure succeeded in capturing the consequences of the delayed flow separation manifested mainly in the reduction of the magnitude of the lift and drag forces relative to the sharp-edged case. These and other results presented here argue in favor of the use of the computationally more efficient unsteady Reynolds-averaged Navier-Stokes approach to this important class of flows provided that the effects of vortex shedding are properly accounted for in the turbulence closure.

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“…The Reynolds number in this case is estimated to be Re = UL= = 2:2 × 10 4 , where U is the velocity of incoming ow and L is the width of the cylinder. The value of Re in this study is the same as that used in the experimental study by Lyn et al [15], based on which Yu [16], Rodi [17], Li and Lin [11] validated their numerical models.…”

Section: Flow Around Square Cylindermentioning

confidence: 87%

An immersed boundary finite difference method for LES of flow around bluff shapes

Wang

2004

Numerical Methods in Fluids

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SUMMARYA three-dimensional numerical model using large eddy simulation (LES) technique and incorporating the immersed boundary (IMB) concept has been developed to compute ow around blu shapes. A fractional step ÿnite di erences method with rectilinear non-uniform collocated grid is employed to solve the governing equations. Blu shapes are treated in the IMB method by introducing artiÿcial force terms into the momentum equations. Second-order accurate interpolation schemes for all sorts of grid points adjacent to the immersed boundary have been developed to determine the velocities and pressure at these points. To enforce continuity, the methods of imposition of pressure boundary condition and addition of mass source=sink terms are tested. It has been found that imposing suitable pressure boundary condition (zero normal gradient) can e ectively reproduce the correct pressure distribution and enforce mass conservation around a blu shape. The present model has been veriÿed and applied to simulate ow around blu shapes: (1) a square cylinder and (2) the Tsing Ma suspension bridge deck section model. Complex ow phenomena such as ow separation and vortex shedding are reproduced and the drag coe cient, lift coe cient, and pressure coe cient are calculated and analyzed. Good agreement between the numerical results and the experimental data are obtained. The model is proven to be an e cient tool for ow simulation around blu bodies in time varying ows.

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Numerical simulation of flow around rectangular prism

Cited by 34 publications

References 12 publications

3D flow around a rectangular cylinder: A computational study

3D flow around a rectangular cylinder: A computational study

Prediction of Turbulent Flow Around a Square Cylinder With Rounded Corners

An immersed boundary finite difference method for LES of flow around bluff shapes

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