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Periodic hill flow simulations with a parameterized cumulant lattice Boltzmann method
Citation Link: https://doi.org/10.15480/882.4469
Publikationstyp
Journal Article
Date Issued
2022-03-17
Sprache
English
Author(s)
Gehrke, Martin
Institut
TORE-DOI
Volume
94
Issue
8
Start Page
1111
End Page
1154
Citation
International Journal for Numerical Methods in Fluids 94 (8): 1111-1154 (2022)
Publisher DOI
Scopus ID
Publisher
Wiley
The article is concerned with the assessment of a cumulant lattice Boltzmann method in wall-bounded, separated turbulent shear flows. The approach is of interest for its resolution-spanning success in turbulent channel flows without using a specific turbulence treatment. The assessment focuses upon the flow over a periodic hill, which offers a rich basis of numerical and experimental data, for Reynolds numbers within (Formula presented.). The analysis involves the mean flow field, second moments and their invariants, as well as spectral data obtained for a wide range of resolutions with (Formula presented.). With the emphasis on a recently published parameterized cumulant collision operator, the universality of the value assigned to a stability preserving regularization parameter is assessed. Reported results guide resolution-dependent optimized values and indicate a required minimum resolution of (Formula presented.). Analog to the findings for attached turbulent shear flows, the approach appears to adequately resolve complex turbulent flows without the need for ad hoc modeling for a range of scale resolving resolutions.
Subjects
cumulant lattice Boltzmann method
GPU computing
lattice Boltzmann
separated shear flows
turbulent boundary layer
turbulent flow
DDC Class
600: Technik
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