Numerical study of the transition of a buoyant plume from a three-dimensional open cavity heated from below

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dc.contributor.authorQiao, M.
dc.contributor.authorTian, Z.
dc.contributor.authorXu, F.
dc.contributor.conference21st Australasian Fluid Mechanics Conference (10 Dec 2018 - 13 Dec 2018 : Adelaide, Australia)
dc.date.issued2018
dc.description.abstractThe transition of a buoyant plume from an open cavity heated from below is studied by using numerical simulation. A small range of Rayleigh numbers from 10⁴ to 10⁵ and aspect ratio of A = 1/2, and Prandtl number of Pr = 0.7 (air) is considered. The plume from an open cavity heated below approaches a periodic puffing state around the Rayleigh number 8.6×10⁴, it suggests that the plume from the open cavity heated below undergoes a supercritical Hopf bifurcation from a steady flow to a periodic flow. The following results reveal that there exists a series of period-doubling bifurcations after the Rayleigh number exceeds 8.6×10⁴. Moreover, the phase pictures are displayed to understand the period-doubling bifurcations further. The understanding of the transition of buoyant plumes from a three-dimensional open cavity is of practical importance for the design of various systems such as smoke exhausts.
dc.description.statementofresponsibilityM. Qiao, Z. Tian and F. Xu
dc.identifier.citationProceedings of the 21st Australasian Fluid Mechanics Conference (AFMC 2018), 2018, pp.1-4
dc.identifier.isbn9780646597843
dc.identifier.orcidTian, Z. [0000-0001-9847-6004]
dc.identifier.urihttp://hdl.handle.net/2440/124733
dc.language.isoen
dc.publisherAustralian Fluid Mechanics Society
dc.rightsCommencing with 19AFMC, the Society holds copyright to papers which appear in the Proceedings. Prior to that, copyright resides with authors of the papers.
dc.source.urihttps://people.eng.unimelb.edu.au/imarusic/proceedings/21%20AFMC%20TOC.html
dc.titleNumerical study of the transition of a buoyant plume from a three-dimensional open cavity heated from below
dc.typeConference paper
pubs.publication-statusPublished

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