Two-dimensional turbulent flows on a bounded domain

W. Kramer

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

Abstract

Large-scale flows in the oceans and the atmosphere reveal strong similarities with purely two-dimensional flows. One of the most typical features is the cascade of energy from smaller flow scales towards larger scales. This is opposed to three-dimensional turbulence where larger flow structures collapse into smaller structures. The inverse energy cascade in two-dimensional turbulence leads to a self-organization of the flow in large scale vortices. For instance in the Adriatic Sea an array of large-size circulations cells can be observed. We have investigated the influence of no-slip walls on two-dimensional turbulent flows by performing direct numerical simulations for a periodic channel domain. The collision of a dipolar vortex with a no-slip wall is used as a model to investigate the interaction between the no-slip wall and a vortex structure. In another type of simulations energy is injected by a forcing mechanism which leads to the development of a turbulent flow. Results are compared with theoretical predictions for infinite domains to reveal the different flow dynamics for bounded domains.
Original languageEnglish
Title of host publicationProceedings of the Seminar at the International Centre for Theoretical Physics, Trieste, Italy, 4 December, 2006
Place of PublicationTrieste, Italy
Publication statusPublished - 2006
EventSeminar at the International Centre for Theoretical Physics, December 4, 2006. Trieste, Italy - Trieste, Italy
Duration: 4 Dec 20064 Dec 2006

Seminar

SeminarSeminar at the International Centre for Theoretical Physics, December 4, 2006. Trieste, Italy
CountryItaly
CityTrieste
Period4/12/064/12/06

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