Large eddy simulation of turbulent flow past a square cylinder confined in a channel

Kim, Do-Hyeong; Yang, Kyung‐Soo; Senda, Mamoru

doi:10.1016/s0045-7930(03)00040-9

Cited by 87 publications

(36 citation statements)

References 11 publications

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“…The turbulent intensity at the inlet is 6% in the experiment [21]. To duplicate the velocity fluctuations, white noise was added to the main velocity profile at the inlet with 6% of U 0 in Root Mean Square (RMS) magnitude, which is also consistent with the LES study [22]. The spanwise size of the computational domain is 3D, and a periodic boundary condition is applied in this direction.…”

Section: Case1: Flow Past a Square Cylinder At Re D 3000 Confined In mentioning

confidence: 95%

“…This test case deals with the turbulent flow past a square cylinder confined in a channel, which has been experimentally studied by Nakagawa et al [21] and numerically investigated by LES [22]. The square cylinder is placed at the center of the channel.…”

Section: Case1: Flow Past a Square Cylinder At Re D 3000 Confined In mentioning

confidence: 99%

“…The Reynolds number is 3000 based on the mean inlet velocity, U 0 , and the cylinder height, D. The height of the channel is 5D, resulting in a high blockage ratio of 20%. The meshes are actually very coarse, compared with the reference LES study in [22], where a mesh containing 2.06 million cells was used with a small spanwise size, equal to D, of the computational domain. The square cylinder is aligned in the´(spanwise) direction, and the inlet flow is set in the x (streamwise) direction.…”

Section: Case1: Flow Past a Square Cylinder At Re D 3000 Confined In mentioning

confidence: 99%

“…A uniform velocity profile with a thin boundary layer thickness (6% of the channel height) is imposed as a main inlet boundary condition, as in the LES study [22]. The turbulent intensity at the inlet is 6% in the experiment [21].…”

Section: Case1: Flow Past a Square Cylinder At Re D 3000 Confined In mentioning

confidence: 99%

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Validation of a novel very large eddy simulation method for simulation of turbulent separated flow

Han

Krajnović

2013

Numerical Methods in Fluids

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SUMMARY The paper describes the validation of a newly developed very LES (VLES) method for the simulation of turbulent separated flow. The new VLES method is a unified simulation approach that can change seamlessly from Reynolds‐averaged Navier–Stokes to DNS depending on the numerical resolution. Four complex test cases are selected to validate the performance of the new method, that is, the flow past a square cylinder at Re = 3000 confined in a channel (with a blockage ratio of 20%), the turbulent flow over a circular cylinder at Re = 3900 as well as Re = 140,000, and a turbulent backward‐facing step flow with a thick incoming boundary layer at Re = 40,000. The simulation results are compared with available experimental, LES, and detached eddy simulation‐type results. The new VLES model performs well overall, and the predictions are satisfactory compared with previous experimental and numerical results. It is observed that the new VLES method is quite efficient for the turbulent flow simulations; that is, good predictions can be obtained using a quite coarse mesh compared with the previous LES method. Discussions of the implementation of the present VLES modeling are also conducted on the basis of the simulations of turbulent channel flow up to high Reynolds number of Reτ = 4000. The efficiency of the present VLES modeling is also observed in the channel flow simulation. From a practical point of view, this new method has considerable potential for more complex turbulent flow simulations at relative high Reynolds numbers. Copyright © 2013 John Wiley & Sons, Ltd.

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Section: Case1: Flow Past a Square Cylinder At Re D 3000 Confined In mentioning

confidence: 95%

Section: Case1: Flow Past a Square Cylinder At Re D 3000 Confined In mentioning

confidence: 99%

Section: Case1: Flow Past a Square Cylinder At Re D 3000 Confined In mentioning

confidence: 99%

Section: Case1: Flow Past a Square Cylinder At Re D 3000 Confined In mentioning

confidence: 99%

See 2 more Smart Citations

Validation of a novel very large eddy simulation method for simulation of turbulent separated flow

Han

Krajnović

2013

Numerical Methods in Fluids

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“…Streamlines around the cube revealed the flow separation and re-attachments clearly. Kim et al 13) simulated the turbulent flow past a square cylinder confined in a channel at Re ¼ 3000. The computational results are in good agreement with the experimental data.…”

Section: Introductionmentioning

confidence: 99%

Investigations on the Flow Fields of Hypersonic Flow Past the Wall-Mounted Square Cylinder with Various Heights

Xue

Chen

Jiang

2013

Trans. Japan Soc. Aero. S Sci.

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Combined with the large eddy simulation (LES), a 3rd-order WENO scheme and the adaptive mesh refinement (AMR) technique, the hypersonic compressible flow (Ma ¼ 5) past wall-mounted square cylinders with different heights is simulated numerically. Our results reveal that with the variation of cylinder heights, the pressure distributions of the flat plane in front of the cylinder are similar and have multiple peaks. The different flow patterns of the flow field around the cylinders are shown and discussed in detail. Our calculated results are in good agreement with corresponding experimental data which can provide important data for related research.

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Relevance of solutions to the Navier-Stokes equations for explaining groundwater flow in fractured karst aquifers

Masciopinto

Palmiotta

2013

Water Resour. Res.

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[1] We examine the use of numeric flow solutions of the Navier-Stokes (N-S) equations to improve flow modeling in fractured karst aquifers. The N-S equations were discretized with both the meshed finite difference method (FDM) and the meshless smoothed particle hydrodynamics method. The results using the FDM model were successfully compared with those taken from the literature. The N-S equations were solved numerically for two practical problems in karst aquifers: (a) the horizontal displacement of the saltwater/ freshwater sharp interface in fissures due to groundwater overexploitation and (b) the pressure and velocity profiles in fissures in the vicinity of an injection well. In the first problem, the numeric N-S solution suggests an exponential time advancement of the freshwater/saltwater interface in fissures. In the second problem, the unsteady water velocity and pressure profiles were determined in fissures having variable apertures in the vicinity of an injection well. The N-S simulation results agreed well with the data collected during the test, thereby removing any uncertainty in the estimation of the aquifer transmissivity.Citation: Masciopinto, C., and D. Palmiotta (2013), Relevance of solutions to the Navier-Stokes equations for explaining groundwater flow in fractured karst aquifers, Water Resour. Res., 49,[3148][3149][3150][3151][3152][3153][3154][3155][3156][3157][3158][3159][3160][3161][3162][3163][3164]

show abstract

Large eddy simulation of turbulent flow past a square cylinder confined in a channel

Cited by 87 publications

References 11 publications

Validation of a novel very large eddy simulation method for simulation of turbulent separated flow

Validation of a novel very large eddy simulation method for simulation of turbulent separated flow

Investigations on the Flow Fields of Hypersonic Flow Past the Wall-Mounted Square Cylinder with Various Heights

Relevance of solutions to the Navier-Stokes equations for explaining groundwater flow in fractured karst aquifers

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