Predictive Framework for Flow Reversals and Excursions in Turbulence

Suri, B (2024) Predictive Framework for Flow Reversals and Excursions in Turbulence. In: Physical Review Letters, 133 (15).

PDF Phy_Rev_Let_2024.pdf - Published Version Restricted to Registered users only Download (1MB) | Request a copy

Abstract

We present a dynamical framework for intermittent reversals and excursions (R&Es) of large-scale circulations in turbulence. We show that R&Es can occur when turbulent trajectories in phase space shadow invariant manifolds of certain unstable periodic orbits (UPOs). Consequently, substantial flow reorganization and extreme fluctuations in flow metrics observed during R&Es can be reconstructed by splicing the unstable manifolds of such dynamically relevant UPOs. Using this geometrical framework, we predict imminent R&Es and preemptively avert these extreme events using closed-loop control. © 2024 American Physical Society.

Item Type:	Journal Article
Publication:	Physical Review Letters
Publisher:	American Physical Society
Additional Information:	The copyright for this article belongs to the publisher.
Keywords:	Orbits, Flow excursion; Flow reversals; In-phase; Invariant manifolds; Large-scale circulation; Phase spaces; Reorganisation; Shadow invariant; Unstable manifold; Unstable periodic orbits, Phase space methods
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	19 Nov 2024 20:39
Last Modified:	19 Nov 2024 20:39
URI:	http://eprints.iisc.ac.in/id/eprint/86753

Actions (login required)

View Item