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 |
Appears in Collections: | Publications without fulltext |
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