test_moissonnage_selune
type: Agent

DNS and experimental study of the transition to chaos in the rotating baroclinic annulus
type: Dataset
contact point: Organization
  fn: CCSD
keyword: nonlinear-dynamics
keyword: physphysphys-geo-phphysics-physicsphysics-physicsgeophysics-physicsgeo-ph
keyword: infoeu-reposemanticsconferenceobject
keyword: phase-coherence
keyword: baroclinic-annulus
keyword: sdustugpsciences-of-the-universe-physicsearth-sciencesgeophysics-physicsgeo-ph
keyword: phase-space-reconstruction
keyword: conference-papers
keyword: physphysphys-ao-phphysics-physicsphysics-physicsatmospheric-and-oceanic-physics-physicsa
landing page: European Geosciences Union 1st General Assembly
description: We discuss the nonlinear dynamics and routes to chaos of baroclinic waves as found in a laboratory experiment, the baroclinic annulus, and in Direct Numerical Simulation (DNS). Thermal convection in a rapidly rotating fluid subject to differential heating occurs in many systems, ranging from the atmosphere to roating machinery. Our focus is the transition sequence from a steady wave to chaotic mixed-mode vacillations via amplitude vacillation. The main techniques used are phase space reconstruction and a phase coherence measure of the different waves to estimate the strength of the nonlinear wave-wave interactions. While experimental evidence tends to show the onset of amplitude vacillation and further bifurcations towards a mode transition to next-lower mode, recent numerical solutions have shown vacillation and modulated vacillation before a mode transition to the next-higher mode. These apparently inconsistent results will be discussed in detail.
issued: 2026-05-10T01:02:18.781421
language: en
modified: 2026-05-10T01:02:18.781425

DNS and experimental study of the transition to chaos in the rotating baroclinic annulus
type: Distribution
access URL: https://hal.science/hal-00085353
format: HTML
issued: 2026-05-10T01:02:18.792243
modified: 2026-05-10T01:02:18.772363