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Scale-resolving turbulent channel flow simulations using a dynamic cumulant lattice Boltzmann method
Citation Link: https://doi.org/10.15480/882.4565
Publikationstyp
Journal Article
Date Issued
2022-07-22
Sprache
English
Author(s)
Gehrke, Martin
Institut
TORE-DOI
Journal
Volume
34
Issue
7
Article Number
075129
Citation
Physics of Fluids 34 (7): 075129 (2022-07)
Publisher DOI
Scopus ID
Publisher
American Institute of Physics
This paper reports the assessment of a modified cumulant lattice Boltzmann method in turbulent channel flows. The suggested approach is of interest for its resolution-spanning capabilities, which are scrutinized for grid resolutions between 4 and 430 wall units. With the emphasis on a recently published parameterized cumulant collision operator, we suggest a resolution-sensitive regularization supplemented by a dynamic subgrid-scale model based upon third-order cumulant expressions, which seamlessly vanishes for direct numerical simulations. The strategy is optionally supplemented by a wall function approach to adjust the wall treatment. The analysis involves the mean flow field, resolved and modeled second moments, two-point correlations, and spectral data and correlation lengths obtained for four friction Reynolds numbers (180, 550, 2000, and 5200). Results display a resolution-independent capability to simulate the attached turbulent shear flow.
DDC Class
530: Physik
600: Technik
Publication version
publishedVersion
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