Modification to Improved Delayed Detached-Eddy Simulation Regarding the Log-Layer Mismatch

Han, Yiyu; He, Yaning; Le, Jialing

doi:10.2514/1.j058535

Cited by 10 publications

(3 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To reduce the computational cost of transient simulations, Spalart et al [45] proposed the detached-eddy simulation (DES) approach which applies URANS to model the boundary layer and LES to resolve the turbulence in the trailing end. Based on the original formulation, there have been improved versions: the delayed-detached-eddy simulation (DDES) by Spalart et al [46], the improved DDES (IDDES) by Shur et al [47] and the modified IDDES by Han et al [48]. It can be summarised that the LES-and DES-based methods will be the best options for transient simulations before DNS becomes affordable.…”

Section: Cfd Simulationsmentioning

confidence: 99%

Wind-Induced Phenomena in Long-Span Cable-Supported Bridges: A Comparative Review of Wind Tunnel Tests and Computational Fluid Dynamics Modelling

2021

View full text Add to dashboard Cite

Engineers, architects, planners and designers must carefully consider the effects of wind in their work. Due to their slender and flexible nature, long-span bridges can often experience vibrations due to the wind, and so the careful analysis of wind effects is paramount. Traditionally, wind tunnel tests have been the preferred method of conducting bridge wind analysis. In recent times, owing to improved computational power, computational fluid dynamics simulations are coming to the fore as viable means of analysing wind effects on bridges. The focus of this paper is on long-span cable-supported bridges. Wind issues in long-span cable-supported bridges can include flutter, vortex-induced vibrations and rain–wind-induced vibrations. This paper presents a state-of-the-art review of research on the use of wind tunnel tests and computational fluid dynamics modelling of these wind issues on long-span bridges.

show abstract

Section: Cfd Simulationsmentioning

confidence: 99%

Wind-Induced Phenomena in Long-Span Cable-Supported Bridges: A Comparative Review of Wind Tunnel Tests and Computational Fluid Dynamics Modelling

2021

View full text Add to dashboard Cite

show abstract

“…In that respect, a relevant scale is the maximum dimension of the cell ∆ max = max [∆ x , ∆ y , ∆ z ] in order to enforce the RANS mode where the mesh is too coarse in any of the directions. Notably, following the analysis of Larsson et al [28] in WMLES, and Han et al [21] in IDDES, it is pointed out that to properly capture the large-scale fluctuations in the near-wall region treated in LES mode, the integral length scale L must be at least greater than twice the maximum grid size (Nyquist theorem): L ≥ 2∆ max . In addition, L can be explicitly related to the distance to the wall d w in the log layer [36]:…”

Section: A Grid-dependent Shielding To Address the Log-layer Mismatchmentioning

confidence: 99%

Development and Validation of a New Formulation of Hybrid Temporal Large Eddy Simulation

Duffal

Meux²,

Manceau

2021

Flow Turbulence Combust

View full text Add to dashboard Cite

Hybrid RANS-LES approaches have aroused interest for years since they provide unsteady information at a reduced numerical cost compared to LES. In the hybrid context, the use of temporal filtering, to control the energy partition between resolved and modeled scales, ensures a consistent bridging between RANS and LES models. In this regard, a new formulation of Hybrid Temporal Large Eddy Simulation (HTLES) is developed, aiming at improving the theoretical foundation of the model associated with an eddy-viscosity closure. The analytical development is performed, applying the Hybrid-Equivalence criterion, and the model is calibrated in decaying isotropic turbulence. In addition, an upgraded version of the approach is proposed to improve the behavior of the model in near-wall regions, introducing a two-fold shielding function and an internal consistency constraint to provide a suitable control of the RANS-to-LES transition. Applying HTLES to the k-ω SST model, the validation process is carried out on channel and periodic-hill flows, over a range of grids and Reynolds numbers. The predictive accuracy and the robustness to grid coarsening are assessed in these cases, ensuring that HTLES offers a cost-saving alternative to LES.

show abstract

“…This includes both zonal methods and seamless methods [5,20,93]. Detached-eddy simulation [90] and related approaches can also be included in that category, including delayed detached-eddy simulation [91], improved delayed detached-eddy simulation [86,36,55] or zonal detached-eddy simulation [22]. Hybrid LES/RANS methods are cost effective since they can provide an overall quite satisfactory prediction of turbulence dynamics (e.g.…”

Section: Introductionmentioning

confidence: 99%

Data-driven wall modeling for turbulent separated flows

Dupuy¹,

Odier²,

Lapeyre³

2023

Journal of Computational Physics

View full text Add to dashboard Cite

Modification to Improved Delayed Detached-Eddy Simulation Regarding the Log-Layer Mismatch

Cited by 10 publications

References 27 publications

Wind-Induced Phenomena in Long-Span Cable-Supported Bridges: A Comparative Review of Wind Tunnel Tests and Computational Fluid Dynamics Modelling

Wind-Induced Phenomena in Long-Span Cable-Supported Bridges: A Comparative Review of Wind Tunnel Tests and Computational Fluid Dynamics Modelling

Development and Validation of a New Formulation of Hybrid Temporal Large Eddy Simulation

Data-driven wall modeling for turbulent separated flows

Contact Info

Product

Resources

About