Monotonically integrated large eddy simulation of free shear flows

AIAA Journal ◽  
1999 ◽  
Vol 37 ◽  
pp. 544-556 ◽  
Author(s):  
C. Fureby ◽  
F. Grinstein
Keyword(s):  
Large Eddy Simulation ◽  
Shear Flows ◽  
Eddy Simulation ◽  
Large Eddy

scholarly journals An Overview of Hybrid RANS–LES Models Developed for Industrial CFD

2021 ◽  
Vol 11 (6) ◽  
pp. 2459
Author(s):  
Florian Menter ◽  
Andreas Hüppe ◽  
Alexey Matyushenko ◽  
Dmitry Kolmogorov
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Large Eddy Simulation ◽  
Boundary Layers ◽  
Shear Flows ◽  
Low Cost ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Computational Fluid Dynamics Cfd

An overview of scale-resolving simulation (SRS) methods used in ANSYS Computational Fluid Dynamics (CFD) software is provided. The main challenges, especially when computing boundary layers in large eddy simulation (LES) mode, will be discussed. The different strategies for handling wall-bound flows using combinations of RANS and LES models will be explained, along with some specific application examples. It will be demonstrated that the stress-blended eddy simulation (SBES) approach is optimal for applications with a mix of boundary layers and free shear flows due to its low cost and its ability to handle boundary layers in both RANS and wall-modeled LES (WMLES) modes.

Large-eddy simulation of shear flows and high-speed vaporizing liquid fuel sprays

2014 ◽  
Vol 105 ◽  
pp. 262-279 ◽  
Author(s):  
Chi-Wei Tsang ◽  
Mario F. Trujillo ◽  
Christopher J. Rutland
Keyword(s):  
Large Eddy Simulation ◽  
High Speed ◽  
Liquid Fuel ◽  
Shear Flows ◽  
Fuel Sprays ◽  
Eddy Simulation ◽  
Large Eddy

Filtered mass density function for large-eddy simulation of turbulent reacting flows

1999 ◽  
Vol 401 ◽  
pp. 85-121 ◽  
Author(s):  
F. A. JABERI ◽  
P. J. COLUCCI ◽  
S. JAMES ◽  
P. GIVI ◽  
S. B. POPE
Keyword(s):  
Monte Carlo ◽  
Large Eddy Simulation ◽  
Transport Equation ◽  
Density Function ◽  
Shear Flows ◽  
Mass Density ◽  
Reacting Flows ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Filtered Mass Density Function

A methodology termed the ‘filtered mass density function’ (FMDF) is developed and implemented for large-eddy simulation (LES) of variable-density chemically reacting turbulent flows at low Mach numbers. This methodology is based on the extension of the ‘filtered density function’ (FDF) scheme recently proposed by Colucci et al. (1998) for LES of constant-density reacting flows. The FMDF represents the joint probability density function of the subgrid-scale (SGS) scalar quantities and is obtained by solution of its modelled transport equation. In this equation, the effect of chemical reactions appears in a closed form and the influences of SGS mixing and convection are modelled. The stochastic differential equations (SDEs) which yield statistically equivalent results to those of the FMDF transport equation are derived and are solved via a Lagrangian Monte Carlo scheme. The consistency, convergence, and accuracy of the FMDF and the Monte Carlo solution of its equivalent SDEs are assessed. In non-reacting flows, it is shown that the filtered results via the FMDF agree well with those obtained by the ‘conventional’ LES in which the finite difference solution of the transport equations of these filtered quantities is obtained. The advantage of the FMDF is demonstrated in LES of reacting shear flows with non-premixed reactants. The FMDF results are appraised by comparisons with data generated by direct numerical simulation (DNS) and with experimental measurements. In the absence of a closure for the SGS scalar correlations, the results based on the conventional LES are significantly different from those obtained by DNS. The FMDF results show a closer agreement with DNS. These results also agree favourably with laboratory data of exothermic reacting turbulent shear flows, and portray several of the features observed experimentally.

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