A new dynamic subgrid eddy viscosity model with application to turbulent channel flow

Cui, Guixiang; Zhou, Hongwei; Zhang, Zhaoshun; Shao, Lei

doi:10.1063/1.1762911

Cited by 47 publications

(45 citation statements)

References 10 publications

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“…Eddy-viscosity models remain the most widely used in LES of geophysical and engineering flows and they encompass a wide range of models that essentially differ in the way the SGS eddy viscosity is computed such as the SmagorinskyLilly model (Smagorinsky 1963;Lilly 1967), the Wong-Lilly model (Wong & Lilly 1994), structure function models (e.g. Metais & Herring 1989;Cui et al 2004) and numerous models based on SGS kinetic energy (e.g. Lilly 1967;Stevens, Moeng & Sullivan 1999).…”

Section: Introductionmentioning

confidence: 99%

Field study of the dynamics and modelling of subgrid-scale turbulence in a stable atmospheric surface layer over a glacier

et al. 2010

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A field experiment -the Snow Horizontal Array Turbulence Study (SnoHATS) -has been performed over an extensive glacier in Switzerland in order to study smallscale turbulence in the stable atmospheric surface layer, and to investigate the role, dynamics and modelling of the subgrid scales (SGSs) in the context of large-eddy simulations. The a priori data analysis aims at comparing the role and behaviour of the SGSs under stable conditions with previous studies under neutral or unstable conditions. It is found that the SGSs in a stable surface layer remain an important sink of temperature variance and turbulent kinetic energy from the resolved scales and carry a significant portion of the fluxes when the filter scale is larger than the distance to the wall. The fraction of SGS fluxes (out of the total fluxes) is found to be independent of stability. In addition, the stress-strain alignment is similar to the alignment under neutral and unstable conditions. The model coefficients vary considerably with stability but in a manner consistent with previous findings, which also showed that scale-dependent dynamic models can capture this variation. Furthermore, the variation of the coefficients for both momentum and heat SGS fluxes can be shown to be better explained by stability parameters based on vertical gradients, rather than vertical fluxes. These findings suggest that small-scale turbulence dynamics and SGS modelling under stable conditions share many important properties with neutral and convective conditions, and that a unified approach is thus possible. This paper concludes with a discussion of some other challenges for stable boundary-layer simulations that are not encountered in the neutral or unstable cases.

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Section: Introductionmentioning

confidence: 99%

Field study of the dynamics and modelling of subgrid-scale turbulence in a stable atmospheric surface layer over a glacier

et al. 2010

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“…The aim of the research on resolved-scale scaling law is to provide a better tool for the subgrid modeling in LES. In this section, we will elaborate its application to the CZZS model [13], a typical SGS model based on the structure functions.…”

Section: Applications Of Resolved-scale Scaling Law In Lesmentioning

confidence: 99%

“…In the original paper of CZZS model, the simplified model was obtained by assuming the full-scale 2/3 scaling law [13].…”

Section: Czzs Model With Fixed Full-scale Scaling Lawmentioning

confidence: 99%

“…This resulted in some confused applications in the existing SGS models. For instance: the original form of the CuiZhou-Zhang-Shao (CZZS) model does not fix the resolvedscale scaling law, while in this paper we will show that it is unstable in calculations; one modification of the CZZS model directly used the full-scale scaling law for the resolved part [13], we will point out their great error in this paper; some preliminary analyses were made to support the improved velocity increment (IVI) model by Fang et al [14], but there was no quantitative result.…”

mentioning

confidence: 99%

“…The core problem of LES is the development of the subgrid-scale (SGS) models which denote some physical relationship between scales. In subgrid modeling, the scaling law can be an important tool to describe the multi-scale properties of turbulence [13,14]. However, it should be emphasized that, in LES we only know the information of the resolved-scale turbulence and can not directly employ the full-scale scaling law.…”

mentioning

confidence: 99%

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Scaling law of resolved-scale isotropic turbulence and its application in large-eddy simulation

Fang

2014

Acta Mech Sin

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Eddy-damping quasinormal Markovian (EDQNM) theory is employed to calculate the resolved-scale spectrum and transfer spectrum, based on which we investigate the resolved-scale scaling law. Results show that the scaling law of the resolved-scale turbulence, which is affected by several factors, is far from that of the full-scale turbulence and should be corrected. These results are then applied to an existing subgrid model to improve its performance. A series of simulations are performed to verify the necessity of a fixed scaling law in the subgrid modeling.

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Anisotropic Subgrid-Scale Modelling: Comparison of LES with High Resolution DNS and Statistical Theory for Rapidly Rotating Turbulence

Shao

Godeferd

Cambon

et al.

Lecture Notes in Computational Science and Engineering

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A new dynamic subgrid eddy viscosity model with application to turbulent channel flow

Cited by 47 publications

References 10 publications

Field study of the dynamics and modelling of subgrid-scale turbulence in a stable atmospheric surface layer over a glacier

Field study of the dynamics and modelling of subgrid-scale turbulence in a stable atmospheric surface layer over a glacier

Scaling law of resolved-scale isotropic turbulence and its application in large-eddy simulation

Anisotropic Subgrid-Scale Modelling: Comparison of LES with High Resolution DNS and Statistical Theory for Rapidly Rotating Turbulence

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