Доступ предоставлен для: Guest
Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Computational Thermal Sciences: An International Journal
ESCI SJR: 0.249 SNIP: 0.434 CiteScore™: 0.7

ISSN Печать: 1940-2503
ISSN Онлайн: 1940-2554

Computational Thermal Sciences: An International Journal

DOI: 10.1615/ComputThermalScien.2016013809
pages 57-71

AN ADAPTIVE FINITE ELEMENT METHOD WITH DYNAMIC LES FOR TURBULENT REACTIVE FLOWS

Jiajia Waters
Los Alamos National Laboratory, T-3 Fluid Dynamics and Solid Mechanics
David Carrington
Los Alamos National Laboratory
Darrell W. Pepper
NCACM, Department of Mechanical Engineering, University of Nevada Las Vegas, Las Vegas, NV 89154, USA

Краткое описание

A Vreman dynamic subgrid scale (SGS) large eddy simulation (LES) model is implemented in a predictor-corrector split h-adaptive finite element method (FEM) for modeling combustion. The use of h-adaptation provides a measurement of the actual error in the discretization, and can adjust spatial accuracy to control the error. By utilizing the dynamic model, laminar or turbulent flow can be automatically calculated. In this study, we try to validate this Vreman SGS LES model in just the fluid dynamics system by assuming all species are air and all results are compared with experimental data and RANS k − ω model. The model is tested by solving an 18° ramp at a Mach number of 2.25 as well as unsteady turbulent flow over a backward-facing step. The high Mach number ramp demonstrates the ability of the model to capture shocks and shock-wave/boundary layer interactions. In the high Reynolds number backward-facing step, large eddies are resolved without the requirement of a fine mesh, in contrast to DNS, although it is finer than a RANS model would require. The reattachment length and instantaneous flow results compare well with published simulations and experimental data.


Articles with similar content:

An Adaptive Finite Element Technique with Dynamic LES for Incompressible and Compressible Flows
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2015, issue
David Carrington, Jiajia Waters, Darrell W. Pepper
A HYBRID LES-RANS FOR NEAR-WALL MODELING
TSFP DIGITAL LIBRARY ONLINE, Vol.4, 2005, issue
John Craig Wells, Yoshifumi Ogami, Thien X. Dinh
HYBRID RANS-LES MODELING BASED ON ZERO- AND ONE-EQUATION MODELS FOR TURBULENT FLOW SIMULATION
TSFP DIGITAL LIBRARY ONLINE, Vol.4, 2005, issue
Shia-Hui Peng
Simulation of Wing-Body Junction Flows with Hybrid RANS/LES Methods
ICHMT DIGITAL LIBRARY ONLINE, Vol.10, 2006, issue
Jingbo Huang, Zhixiang Xiao, Song Fu, Yufei Zhang, Haixin Chen
HYBRID LES-RANS: INLET BOUNDARY CONDITIONS FOR FLOWS INCLUDING RECIRCULATION
TSFP DIGITAL LIBRARY ONLINE, Vol.5, 2007, issue
Lars Davidson