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OnderzoekVan Swinderen Institute

Physics: Prof. dr. G.-J. van Heijst, Eindhoven University of Technology: Turbulence in Flatland

Roster

WhenWhere
12 February 2009 FWN-Building 5111.0080, Nijenborgh 4, 9747 AG, Groningen
Speaker: Physics: Prof. dr. G.-J. van Heijst
Affiliation: Eindhoven University of Technology
Title: 2D turbulence
Date: 12-02-2009
Start: 16.00
Location: FWN-Building 5111.0080

Abstract

The earth’s oceans and atmosphere are full of large vortex structures. Their existence is mainly due to the two-dimensional nature of the large-scale geophysical flows. Two-dimensional turbulent flows are characterised by an ‘inverse energy cascade’, as visible in the self-organisation of these flows: larger vortices and structures are observed to emerge from initially random flow fields. Such vortices are weakly dissipative and hence quite persistent.

In this lecture I will give an overview of a number of fascinating aspects of this type of turbulent flows. Ample attention will be given to laboratory experiments on forced and decaying quasi-two-dimensional turbulence, interaction between vortices, and vortices in perturbed ambient flow fields. In addition to the dynamical features, some aspects of (chaotic) tracer transport in such flow systems will be highlighted.

 

Last modified:12 September 2014 11.21 a.m.