Development of Wall Models for LES Based on Nonlinear Stochastic Estimation
Publication date
2004
Document type
Conference paper
Author
Organisational unit
Conference
Fifth International ER- COFTAC Workshop on DNS and LES: DLES-5, Munich University of Tech- nology, Germany, Aug. 27–29, 2003
Series or journal
ERCOFTAC Series
Periodical volume
9
Book title
Direct and Large–Eddy Simulation V
First page
99
Last page
108
Peer-reviewed
✅
Part of the university bibliography
Nein
Abstract
We present results on a priori estimation of LES wall models by nonlinear stochastic estimation (NLSE). The results are given in form of nonparametric, generalized additive models. First results on a posteriori LES are shown. The analyzed data are taken from a DNS of plane channel flow. The applied method allows for quantitative identification of important model terms and reveals physical mechanisms of the near-wall region. Investigated models are generalizations of known algebraic models. With usual linear methods the resulting functions cannot be found. Additional terms like the wall-normal velocity component and the streamwise pressure gradient are included in the wall model. We find that different terms become important in different regions near the wall.
Cite as
Abel, M., Stojković, D., Breuer, M. (2004). Development of Wall Models for Large-Eddy Simulation Based on Nonlinear Stochastic Estimation. In: Friedrich, R., Geurts, B.J., Métais, O. (eds) Direct and Large-Eddy Simulation V. ERCOFTAC Series, vol 9. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-2313-2_12
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