Numerical studies towards practical large-eddy simulation
Abstract
Large-eddy simulation developments and validations are presented for an improved simulation of turbulent internal flows. Numerical methods are proposed according to two competing criteria: numerical qualities (precision and spectral characteristics), and adaptability to complex configurations. First, methods are tested on academic test-cases, in order to abridge with fundamental studies. Consistent results are obtained using adaptable finite volume method, with higher order advection fluxes, implicit grid filtering and "low-cost" shear-improved Smagorinsky model. This analysis particularly focuses on mean flow, fluctuations, two-point correlations and spectra. Moreover, it is shown that exponential averaging is a promising tool for LES implementation in complex geometry with deterministic unsteadiness. Finally, adaptability of the method is demonstrated by application to a configuration representative of blade-tip clearance flow in a turbomachine.
Cite
@article{arxiv.0801.2047,
title = {Numerical studies towards practical large-eddy simulation},
author = {Jérôme Boudet and Joëlle Caro and L. Shao and Emmanuel Lévêque},
journal= {arXiv preprint arXiv:0801.2047},
year = {2008}
}