Transient shear banding in time-dependent fluids

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Transient shear banding in time-dependent fluids. / Illa, Xavier; Puisto, Antti; Lehtinen, Arttu; Mohtaschemi, Mikael; Alava, Mikko J.

In: Physical Review E, Vol. 87, No. 2, 022307, 22.02.2013, p. 1-5.

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Illa, Xavier ; Puisto, Antti ; Lehtinen, Arttu ; Mohtaschemi, Mikael ; Alava, Mikko J. / Transient shear banding in time-dependent fluids. In: Physical Review E. 2013 ; Vol. 87, No. 2. pp. 1-5.

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@article{94f4b4ab8ecf4f78a3a47ce9050ede68,
title = "Transient shear banding in time-dependent fluids",
abstract = "We 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.",
author = "Xavier Illa and Antti Puisto and Arttu Lehtinen and Mikael Mohtaschemi and Alava, {Mikko J.}",
year = "2013",
month = "2",
day = "22",
doi = "10.1103/PhysRevE.87.022307",
language = "English",
volume = "87",
pages = "1--5",
journal = "Physical Review E",
issn = "2470-0045",
publisher = "American Physical Society",
number = "2",

}

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TY - JOUR

T1 - Transient shear banding in time-dependent fluids

AU - Illa, Xavier

AU - Puisto, Antti

AU - Lehtinen, Arttu

AU - Mohtaschemi, Mikael

AU - Alava, Mikko J.

PY - 2013/2/22

Y1 - 2013/2/22

N2 - We 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.

AB - We 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.

UR - http://www.scopus.com/inward/record.url?scp=84874510057&partnerID=8YFLogxK

U2 - 10.1103/PhysRevE.87.022307

DO - 10.1103/PhysRevE.87.022307

M3 - Article

VL - 87

SP - 1

EP - 5

JO - Physical Review E

JF - Physical Review E

SN - 2470-0045

IS - 2

M1 - 022307

ER -

ID: 13354802