Dynamic subgrid-scale models for momentum and scalar fluxes in large-eddy simulations of neutrally stratified atmospheric boundary layers over heterogeneous terrain

2006 ◽  
Vol 42 (1) ◽  
Author(s):  
Rob Stoll ◽  
Fernando Porté-Agel
Keyword(s):  
Boundary Layers ◽  
Large Eddy Simulations ◽  
Subgrid Scale ◽  
Heterogeneous Terrain ◽  
Atmospheric Boundary Layers ◽  
Scalar Fluxes ◽  
Scale Models ◽  
Large Eddy ◽  
Neutrally Stratified

LES Validation for a Rotating Cylindrical Cavity With Radial Inflow

2016 ◽  
Author(s):  
Michel Onori ◽  
Dario Amirante ◽  
Nicholas J. Hills ◽  
John W. Chew
Keyword(s):  
Boundary Layers ◽  
Source Region ◽  
Tangential Velocity ◽  
Large Eddy Simulations ◽  
Navier Stokes ◽  
Subgrid Scale ◽  
Rotating Cavity ◽  
Scale Models ◽  
Large Eddy ◽  
Type Boundary

This paper describes Large-Eddy Simulations (LES) of the flow in a rotating cavity with narrow inter-disc spacing and a radial inflow introduced from the shroud. Simulations have been conducted using a compressible, unstructured, finite-volume solver, and testing different subgrid scale models. These include the standard Smagorinsky model with Van Driest damping function near the wall, the WALE model and the implicit LES procedure. Reynolds averaged Navier-Stokes (RANS) results, based on the Spalart-Allmaras and SST k-ω models, are also presented. LES solutions reveal a turbulent source region, a laminar oscillating core with almost zero axial and radial velocity and turbulent Ekman type boundary layers along the discs. Validations are carried out against the experimental data available from the study of Firouzian et al. [1]. It is shown that the tangential velocity and the pressure drop across the cavity are very well predicted by both RANS and LES, although significant differences are observed in the velocity profiles within the boundary layers.

Subgrid-scale models for large-eddy simulations of compressible wall bounded flows

AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 1340-1350 ◽  
Author(s):  
E. Lenormand ◽  
P. Sagaut ◽  
L. Ta Phuoc ◽  
P. Comte
Keyword(s):  
Large Eddy Simulations ◽  
Subgrid Scale ◽  
Scale Models ◽  
Large Eddy ◽  
Wall Bounded Flows

The effect of subgrid-scale models on the vortices computed from large-eddy simulations

2004 ◽  
Vol 16 (12) ◽  
pp. 4506-4534 ◽  
Author(s):  
Carlos B. da Silva ◽  
José C. F. Pereira
Keyword(s):  
Large Eddy Simulations ◽  
Subgrid Scale ◽  
Scale Models ◽  
Large Eddy

Subgrid-Scale Models for Large-Eddy Simulations of Compressible Wall Bounded Flows

AIAA Journal ◽  
2000 ◽  
Vol 38 (8) ◽  
pp. 1340-1350 ◽  
Author(s):  
E. Lenormand ◽  
P. Sagaut ◽  
L. Ta Phuoc ◽  
P. Comte
Keyword(s):  
Large Eddy Simulations ◽  
Subgrid Scale ◽  
Scale Models ◽  
Large Eddy ◽  
Wall Bounded Flows

Large Eddy Simulations of a Premixed Jet Combustor Using Flamelet-Generated Manifolds: Effects of Heat Loss and Subgrid-Scale Models

2017 ◽  
Author(s):  
Francisco E. Hernandez Perez ◽  
Bok Jik Lee ◽  
Hong G. Im ◽  
Alessio Fancello ◽  
Andrea Donini ◽  
...  
Keyword(s):  
Heat Loss ◽  
Large Eddy Simulations ◽  
Subgrid Scale ◽  
Scale Models ◽  
Large Eddy
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