Experimental study of densely-seeded gravity-driven particle-laden flow

Simple item page
dc.contributor.authorBi, X.
dc.contributor.authorLau, T.
dc.contributor.authorSun, Z.
dc.contributor.authorNathan, G.
dc.contributor.conference23rd Australasian Fluid Mechanics Conference (AFMC) (4 Dec 2022 - 8 Dec 2022 : Sydney)
dc.date.issued2022
dc.descriptionPaper No: AFMC2022-53
dc.description.abstractParticles free-falling from a densely-seeded hopper with a rectangular outlet were experimentally studied utilising a combination of shadowgraphy and mass flow rate measurements. The study comprised a systematic assessment of the influence of the size of sintered bauxite particles (dp = 163, 192, 216, 257, 363, 399 and 500 μm) and hopper outlet thickness (D = 3, 4, 5 and 8 mm) on the particle distributions downstream from the hopper. A pulsed backlighting system comprising two CCD cameras synchronised with a LED panel was developed to image the particles within a falling distance of ≈ 1 m from the hopper exit. The mass flow rate of the particles was measured simultaneously with the imaging by recording the instantaneous weight of the hopper and its contents at a sampling rate of 1000 Hz. The results show that the particle distribution can be classified into three different regimes, namely a near-field expansion, a neck zone and an intermediate-field expansion. The expansion gradient of the near-field generally increases with the increase of dp and D, and was found to be strongly influenced by the exit particle Stokes number (SK₀). The intermediate-field expansion gradient decreases with the increase of dp, but was found to be insensitive to D, consistent with the current understanding of momentum-driven particle-laden jets. The classified flow regimes reveal the different dominant particle dynamics under different conditions, providing a guidance for the future in-depth studies of the various controlling mechanisms of free-falling particle flows.
dc.description.statementofresponsibilityXiaopeng Bi, Timothy C.W. Lau, Zhiwei Sun and Graham J. Nathan
dc.identifier.citationProceedings of the 23rd Australasian Fluid Mechanics Conference (AFMC2022), 2022, pp.1-8
dc.identifier.issn2653-0597
dc.identifier.orcidBi, X. [0000-0001-9084-7325]
dc.identifier.orcidLau, T. [0000-0003-1851-706X]
dc.identifier.orcidSun, Z. [0000-0001-7899-9676]
dc.identifier.orcidNathan, G. [0000-0002-6922-848X]
dc.identifier.urihttps://hdl.handle.net/2440/143153
dc.language.isoen
dc.publisherAustralasian Fluid Mechanics Society
dc.relation.granthttp://purl.org/au-research/grants/arc/DP180102045
dc.rightsCopyright is held by the author(s) through the Creative Commons BY-NC 4.0 License.
dc.source.urihttps://www.afms.org.au/proceedings/23.html
dc.titleExperimental study of densely-seeded gravity-driven particle-laden flow
dc.typeConference paper
pubs.publication-statusPublished

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
hdl_143153.pdf
Size:
2.06 MB
Format:
Adobe Portable Document Format
Description:
Published version
Download

Collections

Research Outputs