Interaction of vortex rings with multiple permeable screens

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dc.contributor.authorMusta, Mustafa N.
dc.contributor.authorKrueger, Paul S.
dc.date.accessioned2024-02-23T14:17:04Z
dc.date.available2024-02-23T14:17:04Z
dc.date.issued2014
dc.departmentNEÜen_US
dc.description.abstractInteraction of a vortex ring impinging on multiple permeable screens orthogonal to the ring axis was studied to experimentally investigate the persistence and decay of vortical structures inside the screen array using digital particle image velocimetry in a refractive index matched environment. The permeable screens had porosities (open area ratios) of 83.8%, 69.0%, and 55.7% and were held by a transparent frame that allowed the screen spacing to be changed. Vortex rings were generated using a piston-cylinder mechanism at nominal jet Reynolds numbers of 1000, 2000, and 3000 with piston stroke length-to-diameter ratios of 2 and 3. The interaction of vortex rings with the porous medium showed a strong dependence of the overall flow evolution on the screen porosity, with a central flow being preserved and vortex ring-like structures (with smaller diameter than the primary vortex ring) being generated near the centerline. Due to the large rod size used in the screens, immediate reformation of the transmitted vortex ring with size comparable to the primary ring (as has been observed with thin screens) was not observed in most cases. Since the screens have lower complexity and high open area ratios, centerline vortex ring-like flow structures formed with comparable size to the screen pore size and penetrated through the screens. In the case of low porosity screens (55.7%) with large screen spacing, re-emergence of large scale (large separation), weak vortical structures/pairs (analogous to a transmitted vortex ring) was observed downstream of the first screen. Additional smaller scale vortical structures were generated by the interaction of the vortex ring with subsequent screens. The size distribution of the generated vortical structures were shown to be strongly affected by porosity, with smaller vortical structures playing a stronger role as porosity decreased. Finally, porosity significantly affected the decay of total energy, but the effect of screen spacing decreased as porosity decreased. (C) 2014 AIP Publishing LLC.en_US
dc.description.sponsorshipNational Science Foundation [0652046]; Div Of Chem, Bioeng, Env, & Transp Sys; Directorate For Engineering [0652046] Funding Source: National Science Foundationen_US
dc.description.sponsorshipThis material is based on work supported by the National Science Foundation under Grant No. 0652046. This support is gratefully acknowledged.en_US
dc.identifier.doi10.1063/1.4900769
dc.identifier.issn1070-6631
dc.identifier.issn1089-7666
dc.identifier.issue11en_US
dc.identifier.scopus2-s2.0-84909950471en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1063/1.4900769
dc.identifier.urihttps://hdl.handle.net/20.500.12452/12928
dc.identifier.volume26en_US
dc.identifier.wosWOS:000345578700012en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherAmer Inst Physicsen_US
dc.relation.ispartofPhysics Of Fluidsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subject[Keyword Not Available]en_US
dc.titleInteraction of vortex rings with multiple permeable screensen_US
dc.typeArticleen_US

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