scholarly journals Scalar dispersion by a large-eddy simulation and a Lagrangian stochastic subgrid model

2006 ◽  
Vol 18 (9) ◽  
pp. 095101 ◽  
Author(s):  
Guoxin Wei ◽  
Ivana Vinkovic ◽  
Liang Shao ◽  
Serge Simoëns
Keyword(s):  
Large Eddy Simulation ◽  
Scalar Dispersion ◽  
Eddy Simulation ◽  
Subgrid Model ◽  
Large Eddy

Numerical Simulation of an Oscillating Cylinder Using Large Eddy Simulation and Implicit Large Eddy Simulation

2012 ◽  
Vol 134 (3) ◽  
Author(s):  
A. Feymark ◽  
N. Alin ◽  
R. Bensow ◽  
C. Fureby
Keyword(s):  
Large Eddy Simulation ◽  
Eddy Simulation ◽  
Force Magnitude ◽  
Subgrid Model ◽  
Large Eddy ◽  
Sinusoidal Oscillations ◽  
Flow Induced Vibrations ◽  
Lift And Drag ◽  
Implicit And Explicit ◽  
Volume Method

In this work, we use large eddy simulation (LES) to study the influence of grid and subgrid model on the lift and drag force predictions of a fixed cylinder undergoing streamwise sinusoidal oscillations in a steady flow, resulting in a varying Reynolds number, Re, within the range 405 ≤ Re ≤ 2482. This benchmark case is a first step toward studying engineering applications related to flow-induced vibrations. We examine the influence of both grid resolution and the subgrid model using implicit and explicit LES. The methodology used, LES based on a finite-volume method capable of handling moving meshes, are found to provide force predictions that agree well with experimentally measured data, with respect both to the overall flow development and force magnitude.

Aspects of subgrid modelling and large-eddy simulation of magnetohydrodynamic turbulence

1991 ◽  
Vol 45 (2) ◽  
pp. 239-249 ◽  
Author(s):  
Ye Zhou ◽  
George Vahala
Keyword(s):  
Large Eddy Simulation ◽  
Subgrid Scale ◽  
Dynamo Theory ◽  
Mhd Turbulence ◽  
Eddy Simulation ◽  
Subgrid Model ◽  
Large Eddy ◽  
Reversed Field ◽  
Filtering Technique ◽  
Incompressible Mhd

Subgrid-scale closures for magnetohydodynamic (MHD) turbulence are examined using the filtering technique. From the similarities between incompressible MHD turbulence and its hydrodynamic counterpart, as well as ideas from dynamo theory, a subgrid model is constructed from the large-eddy simulation (LES) of MHD turbulence. This model should find applicability in treating LES of the reversed-field pinch.

Sign in / Sign up

Export Citation Format

Share Document