Lagrangian perspectives on turbulent superstructures in Rayleigh‐Bénard convection. Issue 1 (18th November 2019)

• Record Type: Journal Article
• Authors: Klünker, Anna; Schneide, Christiane; Pandey, Ambrish; Padberg-Gehle, Kathrin; Schumacher, Jörg
• Other Names: Eberhardsteiner J. guestEditor.; Schöberl M. guestEditor.
• Is Part Of: Proceedings in applied mathematics and mechanics. Volume 19:Issue 1(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-11-18
• Subjects: Applied mathematics -- Periodicals; Engineering mathematics -- Periodicals; Mathematical physics -- Periodicals; 519
• DOI: 10.1002/pamm.201900201
• Languages: English
• ISSNs: 1617-7061

Abstract

Abstract: We analyze large‐scale patterns in three‐dimensional turbulent convection in a horizontally extended square convection cell by means of Lagrangian particle trajectories calculated in direct numerical simulations. Different Lagrangian computational methods, i.e. finite‐time Lyapunov exponents, spectral and density‐based clustering and transfer operator approaches, are used to detect these large‐scale structures, which are denoted as turbulent superstructures of convection.