Publisher DOI: 10.1007/978-3-030-27607-2_1
Title: Performance of Under-Resolved, Model-Free LBM Simulations in Turbulent Shear Flows
Language: English
Authors: Gehrke, Martin  
Banari, Amir 
Rung, Thomas  
Issue Date: 2020
Publisher: Springer
Source: Notes on Numerical Fluid Mechanics and Multidisciplinary Design (143): 3-18 (2020)
Part of Series: Notes on numerical fluid mechanics and multidisciplinary design 
Volume number: 143
Abstract (english): 
The paper outlines the predictive capabilities of lattice Boltzmann methods (LBM) in turbulent shear flows. Attention is devoted to a specific collision operator which relaxes the distribution functions in cumulant space. The study highlights the benefits of a carefully defined discrete collision operator by scrutinizing the numerical stability and the predictive accuracy for a wide scope of resolutions—ranging from DNS to RANS—when no ad hoc turbulence closure is employed. Examples included are concerned with two frequently computed fundamental flows, i.e. Taylor-Green vortex and channel flows. Results reveal a fair accuracy and a remarkably small resolution dependence for the investigated cumulant collision operator, which is quite the contrary for other collision models.
URI: http://hdl.handle.net/11420/3866
ISBN: 978-3-030-27607-2
978-3-030-27606-5
ISSN: 1860-0824
Institute: Fluiddynamik und Schiffstheorie M-8 
Document Type: Chapter (Book)
Project: Transitions-Manipulation 
Einfluss der Formgebung von Schiffen auf die Propulsionseffizienz und Propeller-Eis-Belastung; Modellierung der Umströmung von Schiffen in eisbedeckten Gewässern 
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