{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,26]],"date-time":"2025-10-26T21:17:18Z","timestamp":1761513438453,"version":"3.41.2"},"reference-count":28,"publisher":"AIP Publishing","issue":"12","license":[{"start":{"date-parts":[[2014,3,25]],"date-time":"2014-03-25T00:00:00Z","timestamp":1395705600000},"content-version":"vor","delay-in-days":1,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"},{"start":{"date-parts":[[2014,3,25]],"date-time":"2014-03-25T00:00:00Z","timestamp":1395705600000},"content-version":"tdm","delay-in-days":1,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2014,3,24]]},"abstract":"<jats:p>Flow velocimetry measurements are made on a non-shear-banding wormlike micellar solution within high-aspect-ratio rectilinear microchannels over a wide range of imposed steady flow rates. At the lowest and highest flow rates tested, Newtonian-like velocity profiles are measured. However, at intermediate flow rates the velocity field never stabilizes on the timescale of the experiments (up to several hours). Here, spatiotemporally dependent \u201cjets\u201d of high velocity fluid are observed to fluctuate within regions of essentially stagnant fluid. The reason for this flow instability remains undetermined, but it has significant consequences for many industrial applications and also for microfluidic rheometry of complex fluids.<\/jats:p>","DOI":"10.1063\/1.4869476","type":"journal-article","created":{"date-parts":[[2014,3,26]],"date-time":"2014-03-26T18:39:15Z","timestamp":1395859155000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":24,"title":["Spatiotemporal flow instabilities of wormlike micellar solutions in rectangular microchannels"],"prefix":"10.1063","volume":"104","author":[{"given":"S. J.","family":"Haward","sequence":"first","affiliation":[{"name":"Departamento de Engenharia Qu\u00edmica, Faculdade de Engenharia da Universidade do Porto , Rua Dr Roberto Frias s\/n, 4200-465 Porto, Portugal"}]},{"given":"F. J.","family":"Galindo-Rosales","sequence":"additional","affiliation":[{"name":"Departamento de Engenharia Qu\u00edmica, Faculdade de Engenharia da Universidade do Porto , Rua Dr Roberto Frias s\/n, 4200-465 Porto, Portugal"}]},{"given":"P.","family":"Ballesta","sequence":"additional","affiliation":[{"name":"Departamento de Engenharia Qu\u00edmica, Faculdade de Engenharia da Universidade do Porto , Rua Dr Roberto Frias s\/n, 4200-465 Porto, Portugal"}]},{"given":"M. A.","family":"Alves","sequence":"additional","affiliation":[{"name":"Departamento de Engenharia Qu\u00edmica, Faculdade de Engenharia da Universidade do Porto , Rua Dr Roberto Frias s\/n, 4200-465 Porto, Portugal"}]}],"member":"317","published-online":{"date-parts":[[2014,3,25]]},"reference":[{"volume-title":"The Structure and Rheology of Complex Fluids","year":"1999","key":"2023061720372224800_c1"},{"key":"2023061720372224800_c2","doi-asserted-by":"crossref","first-page":"667","DOI":"10.1007\/1-4020-3689-2_20","volume-title":"Molecular Gels: Materials With Self-Assembled Fibrillar Networks","year":"2006"},{"key":"2023061720372224800_c3","doi-asserted-by":"publisher","first-page":"77","DOI":"10.1016\/j.cis.2006.11.017","volume":"128\u2013130","year":"2006","journal-title":"Adv. Colloid Interface Sci."},{"key":"2023061720372224800_c4","doi-asserted-by":"publisher","first-page":"276","DOI":"10.1016\/S1359-0294(02)00071-7","volume":"7","year":"2002","journal-title":"Curr. Opin. 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