Large eddy simulation and RANS models
Large eddy simulation of oscillating and deforming airfoils
... stall models in 1988 [12]. Many of the initial numerical models were based on the Navier-Stokes equations, and provided a good correlation with experimental results for specific cases ...turbulence ...
100
CFD analysis of incompressible turbulent flow problems using unsteady RANS and large eddy simulation approach
... The simulation of turbulence may be carried out using either URANS or LES approach to be chosen by the ...linear eddy viscosity based turbulence models with special near wall treatments are found to ...
12
RANS-based Sub-scale Modelling in Eddy-resolving Simulation Methods
... by large temperature gradients ...the RANS simulation however, thermal mixing intensity is severely underpre- dicted resulting in a too narrow thermal mixing layer, characterized by a too steep ...
12
Large eddy simulation of a stenosed artery
... A fully structured mesh was produced, with mild bias towards the walls to enable capture of boundary layer development and also mild bias from both the inlet and outlet towards the region of the stenosis. The mesh ...
15
Supersaturation calculation in large eddy simulation models for prediction of the droplet number concentration
... To evaluate the three techniques discussed above, the mesoscale nonhydrostatic atmospheric research model (Meso-NH) was used. This model was jointly developed by M´et´eo-France Centre National de Recherches Meteo- ...
12
Large eddy simulation of combustion using linear-eddy subgrid modeling
... for large-scale scalar advection in large eddy simula- tions that use the linear eddy sub-grid mixing model A new strategy for splicing is implemented in a pressure-based fluid solver and ...
62
Large eddy simulation of free-surface flows
... a Large Eddy Simulation (LES) based free-surface-resolved CFD method to a couple of flows of hydraulic engineering ...a Large-eddy simulation solver that employs the Level Set ...
17
Large-Eddy Simulation of the Onset of the Sea Breeze
... a large-eddy simulation (LES) model used in an idealized setting to simulate the onset of the sea ...with large-scale winds, and coastline curvature were all neglected in this ...the ...
13
Large Eddy Simulation of Fuel Spray Combustion
... thermodynamic models employed in the spray submodels need to be further evaluated, as recent research [76–83] shows that real gas thermodynamics may be needed in order to describe diesel fuel sprays ...
104
Direct and large-eddy simulation of rotating turbulence
... When an object moves in a rotating flow, it drags along with it a column of fluid parallel to the rotation axis.. Guadalupe Islands[r] ...
57
Implicit large-eddy simulation of a wingtip vortex
... scale models, which tend to rely on a wide range of parameters to dictate their ...two-equation eddy-viscosity k − ω SST turbulence model introduced by Menter [38] in 1994, for example, relies on 9 modeling ...
22
Experimental Assessment of ‘subgrid’ scale Probability Density Function Models for Large Eddy Simulation
... In order to compute the resolved mean temperature from the measured mixture fraction, the relationship between temperature and mixture fraction must be known. This assumption is valid in the case of fast chemistry and ...
14
Adaptive Detached Eddy Simulation and Passive Scalar Transport Modeling for Hybrid RANS/LES
... Lund et al. (1998) proposed the widely used recycling and rescaling method in which the velocity at inflow plane is rescaled using the flow downstream. The velocity is decomposed into mean and fluctuating components. ...
165
A new very large eddy simulation model for simulation of turbulent flow
... hybrid RANS/LES methodologies, Speziale’s Very Large Eddy Simulation (VLES) is one that was early proposed and is a unified simulation approach that can change seamlessly from ...
10
Testing of subgrid scale (SGS) models for large-eddy simulation (LES) of turbulent channel flow
... thi
kness of the shear layer et
. These kind of models work quite well for the spe
i ase that they are designed for, e.g. atta
hed boundary layers and dierent types of thin shear layers. However, they don't give ...
98
Toward advanced subgrid models for Lattice-Boltzmann-based Large-eddy simulation: Theoretical formulations
... for large-eddy simulations (LES) of turbulent flows based on Lattice Boltzmann methods ...Smagorinsky eddy-viscosity ...improved eddy-viscosity subgrid model for ...Navier–Stokes ...
6
Large eddy simulation of premixed and non-premixed combustion
... Swirl flames exhibits complex flow features in terms of various recirculation zones and these features are important in flame stabilization. Fig. 4 shows the LES predicted mean flow pattern with stream traces of axial ...
16
Large eddy simulation of a Mach 0.9 turbulent jet
... the large LES database for wavepacket analysis are summarized in the next two ...total simulation time t sim D/c ∞ = 300 was used for the computation of the flow statistics and far-field noise spectra ...
10
Large Eddy Simulation of Multiple Jets into a Cross Flow
... for large velocity ...for large velocity ...for large velocity ratios, the injected jet is separated from the wall abruptly, such that only the cross ow uid is lled in the region between the wall and ...
11
Application of Large-Eddy Simulation to rotor/stator configurations
... Abstract : A better understanding of unsteady flows is a necessary step towards a breakthrough in the design of gas turbine components. The objective of this work is to investigate the capability of ...
6