Results 21 to 30 of about 375 (167)
Constrained large-eddy simulation of laminar-turbulent transition in compressible channel flows
Advances in Aerodynamics, 2023 An improved approach for constrained large-eddy simulations (CLES) of wall-bounded compressible transitional flows is proposed by introducing an intermittency factor.
Sanmu Chen +3 more
doaj +1 more source
Advances in Aerodynamics, 2022 A dynamic nonlinear algebraic model with scale-similarity dynamic procedure (DNAM-SSD) is proposed for subgrid-scale (SGS) stress in large-eddy simulation of turbulence.
Zelong Yuan +3 more
doaj +1 more source
Large-Eddy Simulation of a Hydrocyclone with an Air Core Using Two-Fluid and Volume-of-Fluid Models
Fluids, 2021 Large-eddy simulations have been conducted for two-phase flow (water and air) in a hydrocyclone using Two-Fluid (Euler–Euler) and Volume-of-Fluid (VOF) models. Subgrid stresses are modeled using a dynamic eddy–viscosity model, and results are compared to
Hassan Fayed +2 more
doaj +1 more source
An approximate inertial manifold (AIM) based closure for turbulent flows
AIP Advances, 2022 A closure model for turbulent flows is developed based on a dynamical system theory. An appropriately discretized formulation of the governing equations is considered for this process.
Maryam Akram +2 more
doaj +1 more source
Simulation of an Evolving Convective Boundary Layer Using a Scale-Dependent Dynamic Smagorinsky Model at Near-Gray-Zone Resolutions [PDF]
Journal of Applied Meteorology and Climatology, 2018 AbstractA scale-dependent Lagrangian-averaged dynamic Smagorinsky subgrid scheme with stratification effects is used to simulate the evolving convective boundary layer of the Wangara (Australia) case study in the gray-zone regime (specifically, for grid lengths from 25 to 400 m).
Efstathiou, G, Plant, R, Bopape, M-J
openaire +3 more sources
Engineering Applications of Computational Fluid Mechanics, 2021 This study numerically investigates the combustion characteristics in a swirl burner for CO-H2 syngas by large eddy simulation. Firstly, experimental data are used to verify the applicability of the Boivin mechanism and the Sandia mechanism.
Chunjie Sui +4 more
doaj +1 more source
Journal of Fluid Science and TechnologyThis study investigates the accuracy of dynamic models in predicting model constants within inviscid flow fields, such as those used in wind farm flow analysis, from the perspectives of identity and turbulent energy conservation accuracy.
Hiroki SUZUKI, Yutaka HASEGAWA
doaj +1 more source
Forced Draught Impact on Externally Venting Flames: An Experimental and Numerical Investigation
Fire and Materials, EarlyView.ABSTRACT Wind can significantly influence fire development and spread in urban and forest environments causing fatal consequences for the public, the first responders, and the environment. Wind‐driven fires can have a significant impact on structural fires as wind can increase the fire's intensity, development, and flame spread.
Anoop Subramania Warrier +5 more
wiley +1 more source
Numerical study of dynamic Smagorinsky models in large‐eddy simulation of the atmospheric boundary layer: Validation in stable and unstable conditions [PDF]
Water Resources Research, 2006 Large‐eddy simulation (LES) of atmospheric boundary layer (ABL) flow is performed over a homogeneous surface with different heat flux forcings. The goal is to test the performance of dynamic subgrid‐scale models in a numerical framework and to compare the results with those obtained in a recent field experimental study (HATS (Kleissl et al., 2004)). In
Kleissl, J. +3 more
openaire +2 more sources
A scale invariance criterion for LES parametrizations
Meteorologische Zeitschrift, 2015 Turbulent kinetic energy cascades in fluid dynamical systems are usually characterized by scale invariance. However, representations of subgrid scales in large eddy simulations do not necessarily fulfill this constraint. So far, scale invariance has been
Urs Schaefer-Rolffs +2 more
doaj +1 more source