Transient shear banding in time-dependent fluids

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorIlla, Xavier
dc.contributor.authorPuisto, Antti
dc.contributor.authorLehtinen, Arttu
dc.contributor.authorMohtaschemi, Mikael
dc.contributor.authorAlava, Mikko J.
dc.contributor.departmentTeknillisen fysiikan laitosfi
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.schoolPerustieteiden korkeakoulufi
dc.contributor.schoolSchool of Scienceen
dc.date.accessioned2015-11-27T10:02:12Z
dc.date.available2015-11-27T10:02:12Z
dc.date.issued2013
dc.description.abstractWe study the dynamics of shear-band formation and evolution using a simple rheological model. The description couples the local structure and viscosity to the applied shear stress. We consider in detail the Couette geometry, where the model is solved iteratively with the Navier-Stokes equation to obtain the time evolution of the local velocity and viscosity fields. It is found that the underlying reason for dynamic effects is the nonhomogeneous shear distribution, which is amplified due to a positive feedback between the flow field and the viscosity response of the shear thinning fluid. This offers a simple explanation for the recent observations of transient shear banding in time-dependent fluids. Extensions to more complicated rheological systems are considered.en
dc.description.versionPeer revieweden
dc.format.extent022307/1-5
dc.format.mimetypeapplication/pdfen
dc.identifier.citationIlla, Xavier & Puisto, Antti & Lehtinen, Arttu & Mohtaschemi, Mikael & Alava, Mikko J. 2013. Transient shear banding in time-dependent fluids. Physical Review E. Volume 87, Issue 2. 022307/1-5. ISSN 1539-3755 (printed). DOI: 10.1103/physreve.87.022307.en
dc.identifier.doi10.1103/physreve.87.022307
dc.identifier.issn1539-3755 (printed)
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/18870
dc.identifier.urnURN:NBN:fi:aalto-201511275368
dc.language.isoenen
dc.publisherAmerican Physical Society (APS)en
dc.relation.ispartofseriesPhysical Review Een
dc.relation.ispartofseriesVolume 87, Issue 2
dc.rights© 2013 American Physical Society (APS). This is the accepted version of the following article: Illa, Xavier & Puisto, Antti & Lehtinen, Arttu & Mohtaschemi, Mikael & Alava, Mikko J. 2013. Transient shear banding in time-dependent fluids. Physical Review E. Volume 87, Issue 2. 022307/1-5. ISSN 1539-3755 (printed). DOI: 10.1103/physreve.87.022307, which has been published in final form at http://journals.aps.org/pre/abstract/10.1103/PhysRevE.87.022307.en
dc.rights.holderAmerican Physical Society (APS)
dc.subject.keywordtime-dependent fluidsen
dc.subject.keywordapplied shear stressen
dc.subject.keywordCouette geometryen
dc.subject.keywordNavier-Stokes equationen
dc.subject.otherPhysicsen
dc.titleTransient shear banding in time-dependent fluidsen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.dcmitypetexten
dc.type.versionFinal published versionen
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
A1_illa_xavier_2013.pdf
Size:
702.62 KB
Format:
Adobe Portable Document Format