Suscripción a Biblioteca: Guest
Portal Digitalde Biblioteca Digital eLibros Revistas Referencias y Libros de Ponencias Colecciones
International Journal for Multiscale Computational Engineering
Factor de Impacto: 1.016 Factor de Impacto de 5 años: 1.194 SJR: 0.554 SNIP: 0.82 CiteScore™: 2

ISSN Imprimir: 1543-1649
ISSN En Línea: 1940-4352

International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.2018021350
pages 45-76

UPSCALING AND DOWNSCALING APPROACHES IN LES-ODT FOR TURBULENT COMBUSTION FLOWS

Yuqiang Fu
Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, North Carolina 27695, USA
Tarek Echekki
Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, North Carolina 27695, USA

SINOPSIS

The multiscale LES-ODT approach in turbulent combustion is based on a hybrid temporal and spatial coupling of a coarse 3D large-eddy simulation (LES) with embedded fine-grained 1D solutions for momentum and thermochemical scalars using the one-dimensional turbulence (ODT) model. Schemes for coupling LES and ODT using wavelet-based approaches for downscaling (information passing from LES to ODT) and the Kalman filter for upscaling (passing statistics from ODT to LES) are developed. Comparison between direct numerical simulation (DNS) and LES-ODT predictions are performed for various turbulence and turbulent combustion cases, including autoignition in non-homogeneous mixtures and twin premixed flames. The results show that the developed upscaling and downscaling schemes predict reasonably well statistics of the combustion problems investigated.


Articles with similar content:

NUMERICAL AND MODELING STRATEGIES FOR THE SIMULATION OF THE CAMBRIDGE STRATIFIED FLAME SERIES
TSFP DIGITAL LIBRARY ONLINE, Vol.8, 2013, issue
Fabian Proch, Renaud Mercier, Benoit Fiorina, Andreas M. Kempf
Action-Based Pathway Modeling for Atomic Surface Diffusion
International Journal for Multiscale Computational Engineering, Vol.5, 2007, issue 3-4
In-Ho Lee, Sukky Jun, Sung Youb Kim
A LES-LANGEVIN MODEL FOR TURBULENCE
TSFP DIGITAL LIBRARY ONLINE, Vol.4, 2005, issue
Berengere Dubrulle, Jean-Philippe Laval
Wavelet-Based Spatial Scaling of Coupled Reaction-Diffusion Fields
International Journal for Multiscale Computational Engineering, Vol.6, 2008, issue 4
Srdjan Simunovic, Sudib Kumar Mishra, Krishna Muralidharan, George Frantziskonis, Sreekanth Pannala, Pierre A. Deymier
Scalar Dispersion by a Large-Eddy Simulation and a Lagrangian Stochastic Subgrid Model
ICHMT DIGITAL LIBRARY ONLINE, Vol.10, 2006, issue
Serge Simoens, G. Wei, Ivana Vinkovic, L. Shao