Experimental observations of lagrangian coherent structures and fluid transports in perturbed Rayleigh-Bénard convection

研究成果: Conference article査読

1 被引用数 (Scopus)

抄録

In this paper, we make experimental observations of the perturbed Rayleigh-Bénard convection to detect the Lagrangian coherent structures (LCSs), which correspond to the invariant manifolds of time-dependent systems and also to investigate the associated fluid transports by numerically integrating the two-dimensional velocity field obtained by Particle Image Velocimetry (PIV). We show the chaotic fluid transports that appear in the system, though some particles are transported almost periodically with time period T or 3T, where T = 17.3 s is the period of the perturbation. We finally propose a novel perturbed Hamiltonian system that enables to recover qualitatively global behaviors observed in experimental results and we also explore the periodic fluid transport that appear in the system.

本文言語English
ページ(範囲)448-453
ページ数6
ジャーナルIFAC-PapersOnLine
54
14
DOI
出版ステータスPublished - 2021
イベント3rd IFAC Conference on Modelling, Identification and Control of Nonlinear Systems MICNON 2021 - Tokyo, Japan
継続期間: 2021 9月 152021 9月 17

ASJC Scopus subject areas

  • 制御およびシステム工学

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