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Quasi-static secondary flow regions formed by microfluidic contraction flows of wormlike micellar solutions
DC Field | Value | Language |
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dc.contributor.author | Jafari Nodoushan, Emad | - |
dc.contributor.author | Lee, Young Ju | - |
dc.contributor.author | Lee, Gwan-Hyoung | - |
dc.contributor.author | Kim, Namwon | - |
dc.date.accessioned | 2024-05-14T07:40:01Z | - |
dc.date.available | 2024-05-14T07:40:01Z | - |
dc.date.created | 2022-02-14 | - |
dc.date.created | 2022-02-14 | - |
dc.date.issued | 2021-09 | - |
dc.identifier.citation | Physics of Fluids, Vol.33 No.9, p. 093112 | - |
dc.identifier.issn | 1070-6631 | - |
dc.identifier.uri | https://hdl.handle.net/10371/202072 | - |
dc.description.abstract | This study investigates the effects of yield stress (tau(0)) and shear banding on the fluidic behaviors of cetyltrimethylammonium bromide/sodium salicylate wormlike micellar solutions flowing through a microfluidic planar contraction (8:1) geometry. Test solutions with different surfactant concentrations (C-d = 75, 87.5, and 100 mM) at a fixed molar ratio of salt to surfactant (R = 0.32) were characterized by shear and extensional rheometry. While the lower concentrated test solution (C-d = 75 mM) with low tau(0) (& AP; 0.02 Pa) and no shear banding showed a Newtonian-like flow behavior for Mach number, Ma < 1, the flow with corner vortices was formed when Ma exceeds unity. For higher C-d (87.5 and 100 mM), new fluidic phenomena are documented: (i) even at a low volumetric flow rate (Q), the fluid velocity at upstream corners was slower than that of Newtonian-like flows and (ii) at higher Q, the secondary flow with a quasi-static condition was formed at Ma well lower than unity. Micro-particle image velocimetry showed the lower shear rates at upstream corners, which can be understood by the effects of contraction entry, shear thinning, and high yield stress. The quasi-static secondary flow region was not induced by generation of elastic shock waves; instead the shear banding was found to be the underlying mechanism for the separation of the region from the main flow. In addition, the length of secondary flow regions showed a close correlation with the Deborah number, which was calculated using the extensional relaxation time. | - |
dc.language | 영어 | - |
dc.publisher | American Institute of Physics | - |
dc.title | Quasi-static secondary flow regions formed by microfluidic contraction flows of wormlike micellar solutions | - |
dc.type | Article | - |
dc.identifier.doi | 10.1063/5.0063084 | - |
dc.citation.journaltitle | Physics of Fluids | - |
dc.identifier.wosid | 000751307700002 | - |
dc.identifier.scopusid | 2-s2.0-85115925698 | - |
dc.citation.number | 9 | - |
dc.citation.startpage | 093112 | - |
dc.citation.volume | 33 | - |
dc.description.isOpenAccess | N | - |
dc.contributor.affiliatedAuthor | Lee, Gwan-Hyoung | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.subject.keywordPlus | EXTENSIONAL RELAXATION-TIMES | - |
dc.subject.keywordPlus | DILUTE POLYMER-SOLUTIONS | - |
dc.subject.keywordPlus | PINCH-OFF DYNAMICS | - |
dc.subject.keywordPlus | NONLINEAR RHEOLOGY | - |
dc.subject.keywordPlus | SODIUM-SALICYLATE | - |
dc.subject.keywordPlus | ELASTICITY NUMBER | - |
dc.subject.keywordPlus | AQUEOUS-SOLUTIONS | - |
dc.subject.keywordPlus | LOW-VISCOSITY | - |
dc.subject.keywordPlus | ENTRY FLOW | - |
dc.subject.keywordPlus | SEMIDILUTE | - |
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