Transient natural convection flow in a cavity subject to time-varying sidewall heating and cooling

Conference Publication ResearchOnline@JCU

Zhou, L.;Armfield, S.W.;Williamson, N.;Kirkpatrick, M.P.;Lin, Wenxian

Abstract

The flow development and behaviour of a fluid in a two-dimensional cavity, heated and cooled periodically from one sidewall, with all other walls adiabatic, is investigated via numerical simulation. The heating and cooling on the sidewall produce alternating direction vertical natural convection boundary layers that entrain fluid from the cavity interior and discharge it at the top and bottom of the cavity. At start up and during a transition phase the heat content of the cavity, which is biased by the initial heating phase, has a non-zero mean. At full development the flow is quasi steady with the natural convection boundary layers maintaining a stable stratification in the cavity interior and the heat content oscillating around a zero mean value. The stratification strength is shown to be strongly dependent on the forcing frequency.

Journal

N/A

Publication Name

AFMC 2016: 20th Australasian Fluid Mechanics Conference

Volume

N/A

ISBN/ISSN

978-1-74052-377-6

Edition

N/A

Issue

N/A

Pages Count

Location

Perth, WA, Australia

Publisher

Australasian Fluid Mechanics Society

Publisher Url

N/A

Publisher Location

Perth, WA, Australia

Publish Date

N/A

Url

N/A

Date

N/A

EISSN

N/A

DOI

N/A