Oscillatory instability of natural convection of air in a laterally heated cube: DNS vs linear stability analysis

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Abstract

Nowadays, when three-dimensional computations replace two-dimensional ones, we make an attempt to extend a classical benchmark on two-dimensional convection of air in a laterally heated square box [1] to a three-dimensional formulation. We focus not only on the steady state flows, but also on the transition to unsteadiness (oscillatory instability), as it was done for the two-dimensional problem in, e.g., in [2] and references therein. It is well known that correct computation of a bifurcation point requires an accurate numerical representation of both steady flow state and the most unstable perturbation (eigenvector of the linearized stability problem), which makes it a noticeably more challanging problem.

Original languageEnglish
Title of host publicationProceedings of CHT-17 ICHMT International Symposium on Advances in Computational Heat Transfer, 2017
PublisherBegell House Inc.
Pages1737-1740
Number of pages4
ISBN (Print)9781567004618
DOIs
StatePublished - 2017
EventInternational Symposium on Advances in Computational Heat Transfer, CHT 2017 - Napoli, Italy
Duration: 28 May 20171 Jun 2017

Publication series

NameInternational Symposium on Advances in Computational Heat Transfer
ISSN (Print)2578-5486

Conference

ConferenceInternational Symposium on Advances in Computational Heat Transfer, CHT 2017
Country/TerritoryItaly
CityNapoli
Period28/05/171/06/17

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