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Publisher DOI: 10.1002/fld.5085
Title: Periodic hill flow simulations with a parameterized cumulant lattice Boltzmann method
Language: English
Authors: Gehrke, Martin  
Rung, Thomas  
Keywords: cumulant lattice Boltzmann method; GPU computing; lattice Boltzmann; separated shear flows; turbulent boundary layer; turbulent flow
Issue Date: 17-Mar-2022
Publisher: Wiley
Source: International Journal for Numerical Methods in Fluids 94 (8) : 1111-1154 (2022)
Abstract (english): 
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.
DOI: 10.15480/882.4469
ISSN: 0271-2091
Journal: International journal for numerical methods in fluids 
Institute: Fluiddynamik und Schiffstheorie M-8 
Document Type: Article
Project: Projekt DEAL 
License: CC BY 4.0 (Attribution) CC BY 4.0 (Attribution)
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