Bulletin of the American Physical Society
77th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 24–26, 2024; Salt Lake City, Utah
Session A11: Nonlinear Dynamics: Coherent Structures
8:00 AM–9:57 AM,
Sunday, November 24, 2024
Room: 155 A
Chair: Tobias Schneider, EPFL
Abstract: A11.00002 : Streamwise Characteristics of Coherent Organizational States in Turbulent Pipe Flow at Moderate Reynolds Numbers*
8:13 AM–8:26 AM
Presenter:
Robert Jäckel
(Federal University of Rio de Janeiro)
Authors:
Robert Jäckel
(Federal University of Rio de Janeiro)
Bruno Magacho
(Instituto Nacional de Matemática Pura e Aplicada)
Bayode Emmanuel Owolabi
(Czech Academy of Sciences, Institute of Thermomechanics)
Luca Moriconi
(Universidade Federal do Rio de Janeiro)
Juliana B Loureiro
(Federal University of Rio de Janeiro)
We provide streamwise statistics for various wave number structures and chaotic residual states at different Reynolds numbers, showing how the lengths of these structures and their chaotic trajectories vary across moderate Reynolds number conditions. Additionally, we investigate the recurrence length scales of these wave number states.
Our findings demonstrate a direct correlation between the size of wave number structures and the Reynolds number, with structure length increasing notably as the Reynolds number rises. Additionally, we observed an inverse relationship between the recurrence length of these structures and their frequency of occurrence.
*The authors gratefully acknowledge the financial support from Shell Brasil through the project “Predictive modelling of inorganic scaling in pipes and equipment subjected to multiphase flows in Pre-Salt conditions” at the Interdisciplinary Center of Fluid Dynamics (NIDF) and the strategic importance of the support given by ANP through the R\&D levy regulation.The research received further financial support from the Brazilian National Council for Scientific and Technological Development (CNPq) and Petrobras (ANP/Petrobras 0050.0126344.24.9).
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