Assessment of eddy resolving techniques for the flow over periodically arranged hills up to Re=37,000

Manhart, Michael; Rapp, Christoph; Peller, Nikolaus; Breuer, M.; Aybay, Orhan; Denev, Jordan A.; Falconi, Carlos

doi:10.1007/978-94-007-0231-8_33

Cited by 8 publications

(14 citation statements)

References 10 publications

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“…On the coarser meshes this value was close to 2 (not included in Table 4). For the higher-Reynolds-number cases the values of y + are above the recommended value for a wall-resolving LES [53], although in line with the values reported in [39] for the MGLET simulations at Re b = 10 595 and Re b = 37 000. As pointed out by the author, the distance over which this maximum wall stress is acting on the flow is very short (≈ 0.5h), and at all other positions the wall resolution can be considered as sufficient, as can be seen in Fig.…”

Section: Computational Detailssupporting

confidence: 83%

“…A coarse fourth-order mesh composed of 8 192 elements and a twice finer version of this mesh composed of 65 536 elements. Both meshes were generated using the 3D finite element mesh generator Gmsh [57].The details of the high-order grids used for the DG simulations as well as those used in the reference FV computations in [38] (LESOCC code) and [39] (MGLET code) are provided in Table 3. The polynomial degree of the simulations is set to p =3, 4 up to 5 for the DNS on the coarse grid, and p =3 and 4 for all other simulations.…”

Section: Computational Detailsmentioning

confidence: 99%

“…The DG solutions are compared to the CFD data provided by Breuer et al [38] (Re b = 2800 and Re b = 10, 595) using the second-order FV code LESOCC on a curvilinear grid and by Manhart et al [39] (Re b = 37, 000) using the secondorder FV code MGLET on a Cartesian mesh. All LES results are also compared to the experimental data provided by Rapp [40].…”

Section: Introductionmentioning

confidence: 99%

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On the use of a high-order discontinuous Galerkin method for DNS and LES of wall-bounded turbulence

2018

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We assess the performance of a high-order discontinuous Galerkin (DG) approach to simulate wall-bounded turbulent flows for a range of Reynolds numbers. First, a plane channel flow configuration with turbulent heat transfer at Re τ = 640 is considered. Second, a detached flow configuration is investigated. This configuration represents the flow over periodically arranged hills. Four bulk Reynolds numbers Re b are considered: 2 800, 10 595, 19 000, and 37 000. For Re b = 2 800 direct numerical simulation (DNS) is used. Large-eddy simulations (LES) based on the WALE subgrid-scale model are carried out for the higher Re b . The simulation results are compared to reference data from CFD and experiment. hp-convergence analyses are performed which demonstrate the superior performance of increasing the polynomial order as compared to refining the mesh. It appears from this work that the use of a subgrid modelling approach together with local hp-adaptation could greatly improve the accuracy of the solution without penalising the computational cost of the simulation.

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Section: Computational Detailssupporting

confidence: 83%

Section: Computational Detailsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the use of a high-order discontinuous Galerkin method for DNS and LES of wall-bounded turbulence

2018

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“…This flow is challenging for any SGS model since it includes separation from a curved surface, a subsequent reattachment of the flow, interactions between the recirculation bubble and the free shear layer and irregular movements of the separation and reattachment lines in time and space. The periodic hill flow has been studied previously using LES, direct numerical simulation (DNS) and experiments [17][18][19][20][21]. The experimental study in [17] was performed at a bulk Reynolds number Re b = 60000.…”

Section: Introductionmentioning

confidence: 99%

“…They also performed experiments at Re b = 10595 and DNSs at lower Reynolds numbers. The bulk Reynolds number and the geometry of the periodic hill flow used in this paper is similar to the one in [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Large eddy simulation of channel flow with and without periodic constrictions using the explicit algebraic subgrid-scale model

Rasam

Wallin

Brethouwer

et al. 2014

Journal of Turbulence

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PostprintThis is the accepted version of a paper published in Journal of turbulence. This paper has been peerreviewed but does not include the final publisher proof-corrections or journal pagination. Citation for the original published paper (version of record):Rasam, A., Wallin, S., Brethouwer, G., Johansson, A V. (2014) Large eddy simulation of channel flow with and without periodic constrictions using the explicit algebraic subgrid-scale model. Vol. 15, No. 11, 2014, 1-24 Large eddy simulation of channel flow with and without periodic constrictions using the explicit algebraic subgrid-scale model & Fluids, vol. 38, 2009, pp.433-457) using the DSM. Results show that the mean velocity profiles, the friction and pressure coefficients, the length and shape of the recirculation bubble, as well as the Reynolds stresses are considerably better predicted by the EASSM than the DSM and the no SGS model simulations. It was also observed that in some parts of the domain the resolved strain-rate and SGS shear stress have the same sign. The DSM cannot produce a correct SGS stress in this case, in contrast to the EASSM. Journal of turbulence,

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DNS and LES of the Flow Over Periodic Hills Based on a Discontinuous Galerkin Approach

Plata

Couaillier

Pape

2017

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

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Assessment of eddy resolving techniques for the flow over periodically arranged hills up to Re=37,000

Cited by 8 publications

References 10 publications

On the use of a high-order discontinuous Galerkin method for DNS and LES of wall-bounded turbulence

On the use of a high-order discontinuous Galerkin method for DNS and LES of wall-bounded turbulence

Large eddy simulation of channel flow with and without periodic constrictions using the explicit algebraic subgrid-scale model

DNS and LES of the Flow Over Periodic Hills Based on a Discontinuous Galerkin Approach

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