Title: | Nonlinear stochastic estimation of wall models for LES | Authors: | Abel, Markus Stojković, Dragan Breuer, Michael |
Language: | eng | Issue Date: | 2006 | Publisher: | Elsevier | Document Type: | Article | Journal / Series / Working Paper (HSU): | International Journal of Heat and Fluid Flow | Volume: | 27 | Issue: | 2 | Page Start: | 267 | Page End: | 278 | Publisher Place: | Amsterdam | Abstract: | A key technology for large eddy simulation (LES) of complex flows is an appropriate wall modeling strategy. In this paper we apply for the first time a fully nonparametric procedure for the estimation of generalized additive models (GAM) by conditional statistics. As a database, we use DNS and wall-resolved LES data of plane channel flow for Reynolds numbers, Re and 10,935, 22,776 (LES). The statistical method applied is a quantitative tool for the identification of important model terms, allowing for an identification of some of the near-wall physics. The results are given as nonparametric functions which cannot be attained by other methods. We investigated a generalized model which includes Schumann's and Piomelli et al.'s model. A strong influence of the pressure gradient in the viscous sublayer is found; for larger wall distances the spanwise pressure gradient even dominates the τw,zy component. The first a posteriori LES results are given. © 2005 Elsevier Inc. All rights reserved. |
Organization Units (connected with the publication): | Universität Erlangen-Nürnberg | ISSN: | 0142-727X | Publisher DOI: | 10.1016/j.ijheatfluidflow.2005.10.011 |
Appears in Collections: | 6 - Publication references (without fulltext) of your publications before HSU |
Show full item record
CORE Recommender
User Tools
Items in openHSU are protected by copyright, with all rights reserved, unless otherwise indicated.