Results 141 to 150 of about 52,645 (193)

An Attempt of Large Eddy Simulation (LES) for Combustor Modeling

2021
An attempt of large eddy simulation (LES) in a model combustor is performed, and a number of critical issues, such as grid size, incoming flow, wall boundary, physical sub-model and result sampling, are discussed. The computed results are compared with comprehensive experimental measurements, and illustrate that the mean axial velocity and temperature ...
Jiang, Lei-Yong, Campbell, Ian
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Large-Eddy Simulation (LES) of Large Hydrocyclones

Particulate Science and Technology, 2007
Fluid dynamics theory applied to the hydrocyclone flow field has progressed in past experimental and theoretical investigations from a two-dimensional Prandtl mixing-length turbulence modeling to the current level of three-dimensional large-eddy simulation (LES) and differential-stress approaches.
Jose A. Delgadillo, Raj K. Rajamani
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Large-eddy simulation (LES) of the large scale bubble plume

Chemical Engineering Science, 2009
Abstract A large-eddy simulation of gas–liquid flow in a large scale bubble plume is presented. The Euler-Euler approach is used to describe the equations of motion of the two phase flow. The sub-grid scale modeling is based on the Smagorinsky kernel. All the non-drag forces (turbulent dispersion force (only for RANS), virtual mass force, lift force)
Mahesh T. Dhotre, Bojan Niceno, Brian L. Smith, Marco Simiano   +3 more
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Improved Engine Wall Models for Large Eddy Simulation (LES)

SAE Technical Paper Series, 2013
<div class="section abstract"><div class="htmlview paragraph">Improved wall models for LES are presented in this paper. The classical Werner-Wengle (WW) wall shear stress model was used along with the eddy viscosity near walls. A sub-grid scale turbulent kinetic energy was employed in a model for the eddy viscosity.
Chalearmpol Plengsaard, Christopher Rutland   +1 more
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Large-Eddy Simulation (LES) of settling particle cloud dynamics

International Journal of Multiphase Flow, 2014
A series of Euler–Lagrangian four-way coupling Large-Eddy Simulations (LES) are performed to study the dynamics of settling particle clouds. The numerical method is first validated by comparing with existing experimental results. Then, a parametric study is performed with various initial release shapes, particle sizes, and cloud buoyancies.
Wang, Ruo-Qian, Law, Adrian Wing-Keung, Adams, E. Eric   +2 more
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Large eddy simulation (LES) for synthetic jet thermal management

International Journal of Heat and Mass Transfer, 2006
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Wang, Yong, Yuan, Guang, Yoon, Yong-Kyu, Allen, Mark G., Bidstrup, Sue Ann   +4 more
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Large-Eddy-Simulation (LES) Analysis

2016
Computational Fluid Dynamics, usually abbreviated as CFD, has become a “third” approach in addition to the classic analytical treatment and the experimental investigation of flow and heat transfer phenomena. CFD is a branch of fluid mechanics that uses numerical methods and mathematical algorithms to solve and analyze problems that involve flow ...
Stefan aus der Wiesche, Christian Helcig
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Board level thermal analysis via Large Eddy Simulation (LES) tool

The Ninth Intersociety Conference on Thermal and Thermomechanical Phenomena In Electronic Systems (IEEE Cat. No.04CH37543), 2004
Large Eddy Simulation (LES) is a step beyond widely used Reynolds Averaged Navier Stokes formulation (RANS) with turbulence model. LES is unsteady, therefore, predicts evolution of turbulent eddies in time. The only physic that is not resolved is the evolution of so-called sub-grid eddies, these are turbulent eddies smaller then local grid resolution ...
F. Roknaldin, A. Panigrahy
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Coarse Resolution Turbulence Simulations With Spectral Vanishing Viscosity—Large-Eddy Simulations (SVV-LES)

Journal of Fluids Engineering, 2002
We present a new implementation of the spectral vanishing viscosity method appropriate for alternative formulations of large-eddy simulations. We first review the method and subsequently present results for turbulent incompressible channel flow.
Robert M. Kirby, George Em Karniadakis
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Chemical Tomography in a Fresh Wildland Fire Plume: A Large Eddy Simulation (LES) Study

Journal of Geophysical Research: Atmospheres, 2021
Abstract Wildland fires involve complicated processes that are challenging to represent in chemical transport models. Recent airborne measurements reveal remarkable chemical tomography in fresh wildland fire plumes, which remain yet to be fully explored using models.
Siyuan Wang, Matthew Mitchell Coggon, Georgios I. Gkatzelis, Carsten Warneke, Ilann Bourgeois, Thomas B. Ryerson, Jeff Peischl, Patrick R Veres, J. Andrew Neuman, Johnathan Hair, Taylor Shingler, Marta A Fenn, Glenn S. Diskin, L. Gregory Huey, Young Ro Lee, Eric C Apel, Rebecca S. Hornbrook, Alan J. Hills, Samuel R Hall, Kirk Ullmann, Megan Marie Bela, Michael K. Trainer, Rajesh Kumar, John Orlando, Frank Flocke, Louisa K. Emmons   +25 more
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