A Statistically-Derived Subgrid-Scale Kinetic Energy Model for the Large-Eddy Simulation of Turbulent Flows

1985 ◽  
Vol 54 (8) ◽  
pp. 2834-2839 ◽  
Author(s):  
Akira Yoshizawa ◽  
Kiyosi Horiuti
Keyword(s):  
Kinetic Energy ◽  
Large Eddy Simulation ◽  
Turbulent Flows ◽  
Energy Model ◽  
Subgrid Scale ◽  
Eddy Simulation ◽  
Large Eddy

scholarly journals Physical consistency of subgrid-scale models for large-eddy simulation of incompressible turbulent flows

2017 ◽  
Vol 29 (1) ◽  
pp. 015105 ◽  
Author(s):  
Maurits H. Silvis ◽  
Ronald A. Remmerswaal ◽  
Roel Verstappen
Keyword(s):  
Large Eddy Simulation ◽  
Turbulent Flows ◽  
Subgrid Scale ◽  
Eddy Simulation ◽  
Scale Models ◽  
Large Eddy

scholarly journals Toward the large-eddy simulation of compressible turbulent flows

1992 ◽  
Vol 238 ◽  
pp. 155-185 ◽  
Author(s):  
G. Erlebacher ◽  
M. Y. Hussaini ◽  
C. G. Speziale ◽  
T. A. Zang
Keyword(s):  
Large Eddy Simulation ◽  
Linear Combination ◽  
Turbulent Flows ◽  
Isotropic Turbulence ◽  
Collocation Methods ◽  
Subgrid Scale ◽  
Fine Grid ◽  
Eddy Simulation ◽  
Scale Models ◽  
Large Eddy

New subgrid-scale models for the large-eddy simulation of compressible turbulent flows are developed and tested based on the Favre-filtered equations of motion for an ideal gas. A compressible generalization of the linear combination of the Smagorinsky model and scale-similarity model, in terms of Favre-filtered fields, is obtained for the subgrid-scale stress tensor. An analogous thermal linear combination model is also developed for the subgrid-scale heat flux vector. The two dimensionless constants associated with these subgrid-scale models are obtained by correlating with the results of direct numerical simulations of compressible isotropic turbulence performed on a 963 grid using Fourier collocation methods. Extensive comparisons between the direct and modelled subgrid-scale fields are provided in order to validate the models. A large-eddy simulation of the decay of compressible isotropic turbulence – conducted on a coarse 323 grid – is shown to yield results that are in excellent agreement with the fine-grid direct simulation. Future applications of these compressible subgrid-scale models to the large-eddy simulation of more complex supersonic flows are discussed briefly.

scholarly journals Statistical Analysis of Dynamic Subgrid Modeling Approaches in Large Eddy Simulation

2021 ◽  
Author(s):  
Mohammad Khalid Hossen ◽  
Asokan Mulayath Variyath ◽  
Jahrul M Alam
Keyword(s):  
Kinetic Energy ◽  
Large Eddy Simulation ◽  
Turbulent Flows ◽  
Large Scale ◽  
Physical Space ◽  
Statistical Characteristics ◽  
Small Scale ◽  
Eddy Simulation ◽  
Wide Range ◽  
Large Eddy

In large eddy simulation (LES) of turbulent flows, the most critical dynamical processes to be considered by dynamic subgrid models to account for an average cascade of kinetic energy from the largest to the smallest scales of the flow is not fully clear. Furthermore, evidence of vortex stretching being the primary mechanism of the cascade is not out of the question. In this article, we study some essential statistical characteristics of vortex stretching and its role in dynamic approaches of modeling subgrid-scale turbulence. We have compared the interaction of subgrid stresses with the filtered quantities among four models using invariants of the velocity gradient tensor. This technique is a single unified approach to studying a wide range of length scales in the turbulent flow. In addition, it also provides a rational basis for the statistical characteristics a subgrid model must serve in physical space to ensure an appropriate cascade of kinetic energy. Results indicate that the stretching mechanism extracts energy from the large-scale straining motion and passes it onto small-scale stretched vortices.

Scale-adaptive subgrid-scale modelling for large-eddy simulation of turbulent flows

2017 ◽  
Vol 29 (3) ◽  
pp. 035101 ◽  
Author(s):  
Changping Yu ◽  
Zuoli Xiao ◽  
Xinliang Li
Keyword(s):  
Large Eddy Simulation ◽  
Turbulent Flows ◽  
Subgrid Scale ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Scale Modelling
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