Please use this identifier to cite or link to this item: http://hdl.handle.net/10216/81038
Author(s): Simon Haward
Francisco Galindo Rosales
Pierre Ballesta
Manuel Alves
Title: Spatiotemporal flow instabilities of wormlike micellar solutions in rectangular microchannels
Issue Date: 2014
Abstract: Flow velocimetry measurements are made on a non-shear-banding wormlike micellar solutionwithin 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 theexperiments (up to several hours). Here, spatiotemporally dependent ¿jets¿ of high velocity fluidare observed to fluctuate within regions of essentially stagnant fluid. The reason for this flowinstability remains undetermined, but it has significant consequences for many industrialapplications and also for microfluidic rheometry of complex fluids.
Subject: Ciências exactas e naturais
URI: http://hdl.handle.net/10216/81038
Document Type: Artigo em Revista Científica Internacional
Rights: openAccess
License: https://creativecommons.org/licenses/by-nc/4.0/
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

Files in This Item:
File Description SizeFormat 
106282.pdf1.25 MBAdobe PDFThumbnail
View/Open


This item is licensed under a Creative Commons License Creative Commons