Extraction of finite-time coherent sets in 3D Rayleigh-Benard Convection using the dynamic Laplacian

Publikation: Beiträge in ZeitschriftenKonferenz-Abstracts in FachzeitschriftenForschung

Authors

Turbulent convection flows in nature are often organized in regular large-scale patterns, which evolve slowly relative to to the typical convective timescale, and are arranged on spatial scales that are much larger than the layer height. Prominent examples are cloud streets in the atmosphere and granulation patterns in solar convection. This order in a fully developed turbulent flow is sometimes called turbulent superstructure in convection. Large-scale structure formation in turbulent Rayleigh-Benard convection recently became accessible in direct numerical simulations, which resolve all relevant scales of turbulence in horizontally extended domains with a large aspect ratio. Using DNS output we apply the dynamic Laplacian approach [Froyland, 2015] to identify these turbulent superstructures as finite-time coherent sets in both quasi-2D and fully three-dimensional settings. A modest number of trajectories are meshed and a finite-element based method is employed to numerically estimate the dynamic Laplacian [Froyland & Junge, 2018]. The coherent sets are encoded in the leading eigenvectors of the dynamic Laplacian, and the individual coherent sets are ``decoded'' using the recently developed Sparse Eigenbasis Approximation (SEBA) algorithm [Froyland, Rock, & Sakellariou, 2019]
OriginalspracheEnglisch
AufsatznummerK08.00003
ZeitschriftBulletin of the American Physical Society
Jahrgang65
Ausgabenummer13
Anzahl der Seiten1
ISSN0003-0503
PublikationsstatusErschienen - 2020
Veranstaltung73rd Annual Meeting of the APS Division of Fluid Dynamics - 2021 - Chicago, USA / Vereinigte Staaten
Dauer: 22.11.202024.11.2020
Konferenznummer: 73

Bibliographische Notiz

Titel d. Ausgabe: 73rd Annual Meeting of the APS Division of Fluid Dynamics ; Virtual, CT (Chicago time)

Zugehörige Projekte

  • Lagrangesche Aspekte turbulenter Superstrukturen: numerische Analyse der Langzeitdynamik und Transporteigenschaften

    Projekt: Forschung

Links

Zuletzt angesehen

Publikationen

  1. Correlation between Isometric Maximum Strength and One Repetition Maximum in the Calf Muscle in Extended and Bended Knee Joint
  2. Development of a Questionnaire Assessing Discomfort – The Disco-Scale
  3. Operationalising the leverage points perspective for empirical research
  4. Conditions of One-Way and Two-Way Approaches in Strategic Start-Up Communication
  5. Residual stresses in continuously reinforced composite profiles with symmetric cross sections
  6. Robust Control as a Mathematical Paradigm for Innovative Engineering Applications
  7. The multipole resonance probe: Evolution of a plasma sensor
  8. Robust Control using Sliding Mode Approach for Ice-Clamping Device activated by Thermoelectric Coolers
  9. Affect, stress, and health
  10. 插畫與跨符號翻譯:無稽詩文的視覺呈現
  11. Gamification as twenty-first-century ideology
  12. The Epistemology of Management: An Introduction
  13. Natures running wild
  14. PragmatiKK: Target Group-specific Approach in a web-based Stress Prevention Platform for Micro and Small Companies
  15. Mechanical properties and corrosion behavior of Mg-Gd-Ca-Zr alloys for medical applications
  16. Environmental Regulation and Sustainable Competitiveness
  17. Dealing with discrimination and the struggle for social advancement in migrant families
  18. How Organizing Matters for Societal Grand Challenges
  19. Vegetation responses to environmental conditions in floodplain grasslands
  20. Adjustment of deferred compensation schemes, fairness concerns, and hiring of older workers
  21. Protocol
  22. Lehrer. Bildung. Gestalten
  23. Offshore Oil and LNG Terminals
  24. Positiv, Positivität
  25. The impacts of rare disasters on asset returns and risk premiums in advanced economies (1870–2015)
  26. This way, please
  27. Basel II Rahmenwerk
  28. John Barth
  29. Coupled component modelling for inter- and transdisciplinary climate change impact research
  30. The German Venture Investors' Perspective on Success Factors of Digital Start-ups: A Mixed-Methods Approach.
  31. Governance arrangements in the Hamburg metropolitan region
  32. Cortisol Effects on Flow-Experience
  33. Correction to
  34. Der Nachhaltigkeitsprozess der Universität Graz - analysiert durch das Grazer Modell für Integrative Entwicklung
  35. Ten Theses on Technology and Organization