Large Eddy Simulation of High-Reynolds-Number Wall Bounded Flows

Fureby, Christer; Alin, Niklas; Wikström, Niklas; Menon, Suresh; Svanstedt, Nils; Persson, Leif

doi:10.2514/1.3982

Cited by 86 publications

(38 citation statements)

References 38 publications

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“…In a series of inter-related publications, Patel, Stone & Menon (2003); Patel & Menon (2007); Fureby et al (2004) and Persson et al (2006) report simulations for the same hill -in the case of Persson et al (2006), not only with pure LES, but also with Detached Eddy Simulation (DES) and RANS closures, the last already mentioned above. A representative statement on all these simulations may justifiably be made by reference to the most recent publication from this group of collaborators by Patel & Menon (2007).…”

Section: Introductionmentioning

confidence: 99%

Large-eddy simulation of separated flow over a three-dimensional axisymmetric hill

García-Villalba

Rodi

et al. 2009

J. Fluid Mech.

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The paper examines, by means of highly resolved large-eddy simulations, the fluid mechanic behaviour of an incompressible, turbulent flow separating from an axisymmetric, hill-shaped obstacle. The hill is subjected to a turbulent flat-plate boundary layer of thickness half of the hill height, developing within a large duct in which the hill is placed. The Reynolds number based on the hill height and the free-stream velocity is 130 000, and the momentum-thickness Reynolds number of the boundary layer is 7300. Extensive and detailed experimental data are available for these same conditions, and these are compared with the simulations. Two entirely independent simulations are reported, undertaken by different groups with different codes and different grids. They are shown to agree closely in most respects, and any differences are carefully identified and discussed. Mean-flow properties, pressure distributions and turbulence characteristics are reported and compared with the experimental data, with particular emphasis being placed on the separation region that is formed in the leeward of the hill and on the near wake. The connection between the wall topology of the mean flow and the secondary motions in the wake is discussed in detail. Finally, some aspects of the unsteady flow are analysed, including the unsteadiness of the separation process and structural features and coherent motions in the wake.

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Section: Introductionmentioning

confidence: 99%

Large-eddy simulation of separated flow over a three-dimensional axisymmetric hill

García-Villalba

Rodi

et al. 2009

J. Fluid Mech.

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“…For definiteness, Re x 0 = 5·10 5 is chosen, which is an approximate location of transition, and it is also a suitable choice for the type of "tripped" LES which is illustrated in the next section. Thus, Re x 0 is considered fixed and, b/x 0 = Re b /Re x 0 , is inserted into the estimate forN 1 , see equation (6), to obtain,…”

Section: A Grid Estimate For Nwm-lesmentioning

confidence: 99%

On Grid Resolution Requirements for Les of Wall-Bounded Flows

Rezaeiravesh¹,

Liefvendahl²,

Fureby³

2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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Abstract. Grid requirements for LES of wall-bounded flows are considered. The setting is a zero pressure gradient turbulent boundary layer on a flat plate, but the results are intended to be of use generally for the simulation of flows with an important influence of turbulent boundary layers. The basis for the grid estimates are expressions for the thickness and the viscous length scale of a turbulent boundary layer. The literature is reviewed, and a new power law is proposed, the coefficients of which have been determined using recent high-Re experimental data. An estimation for the number of grid points required for NWM-LES is derived, which is more general than previously published such estimates. A complete simulation methodology, including a numerical tripping device for transition to turbulence in the boundary layer, is demonstrated for NWM-LES of a flat plate turbulent boundary layer. The predictive accuracy is assessed by comparison with DNS data.

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“…The results of the computation will be compared with the experimental data available in the literature [16,17,18,19,20,21,22]. The 6:1 prolate spheroid used for the measurements is 1.37 m long and the Reynolds number based on the spheroid length is 4.20?10 6 .…”

Section: Summary Of Prolate Spheroid Simulationsmentioning

confidence: 99%

“…Oil flow patterns from LES simulation by Fureby [22] (shown in Figure 72) is used for the comparison with the present simulation. A close examination of Figure 70, Figure 71, and Figure 72 reveals that the weighted least square method for gradient estimation produces better comparison with the LES simulation.…”

Section: Summary Of Prolate Spheroid Simulationsmentioning

confidence: 99%

Aero-Optics Code Development: Experimental Databases and AVUS Code Improvements

Sherer¹

2009

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Large Eddy Simulation of High-Reynolds-Number Wall Bounded Flows

Cited by 86 publications

References 38 publications

Large-eddy simulation of separated flow over a three-dimensional axisymmetric hill

Large-eddy simulation of separated flow over a three-dimensional axisymmetric hill

On Grid Resolution Requirements for Les of Wall-Bounded Flows

Aero-Optics Code Development: Experimental Databases and AVUS Code Improvements

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