Fluid Mechanics and Acoustics Laboratory - UMR 5509

LMFA - UMR 5509
Laboratoire de Mécanique des Fluides et d’Acoustique
Lyon
France


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Home > Teams > Turbulence & Instabilities > Research activities > Flow instabilities

shear-thinning film flow down an incline

shear-thinning film flow down an incline

Nous étudions expérimentalement et numériquement les conditions d’apparition d’instabilités dans les écoulements de films de fluides non-newtoniens sur plan incliné, avec un fond poreux et en présence de surfactants. Ce problème intéresse le secteur industriel faisant appel à des méthodes de couchage (industrie alimentaire, photographique, papeterie,…) ainsi que le domaine environnemental, notamment l’écoulement de glaciers, laves ou boues en suspension.
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Staff implied: Séverine Millet, Simon Dagois-Bohy (FCT), Valéry Botton et Daniel Henry ;
Collaborations : R. Usha (IIT Madras, Inde), S. Kaddeche (INSAT Tunis, Tunisie).


Associated publications:

Instabilities in viscosity-stratified two-fluid channel flow over an anisotropic-inhomogeneous porous bottom

Article in Phys. Fluids (2019)

Instabilities in viscosity-stratified two-fluid channel flow over an anisotropic-inhomogeneous porous bottom

Geetanjali Chattopadhyay, Usha Ranganathan & Séverine Millet

A linear stability analysis of a pressure driven, incompressible, fully developed laminar Poiseuille flow of immiscible two-fluids of stratified viscosity and density in a horizontal channel (...)

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The mechanism of long-wave instability in a shear-thinning film flow on a porous substrate

Article in Acta Mechanica (2019)

The mechanism of long-wave instability in a shear-thinning film flow on a porous substrate

Séverine Millet, Ranganathan Usha, Valéry Botton & François Rousset

A linear stability analysis of a thin shear-thinning film with a deformable top surface flowing down an inclined porous substrate modelled as a smooth substrate with velocity slip at the wall is (...)

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Primary instability of a shear-thinning film flow down an incline: experimental study

Article in J. Fluid Mech. (2017)

Primary instability of a shear-thinning film flow down an incline: experimental study

M. H. Allouche, V. Botton, S. Millet, D. Henry, S. Dagois-Bohy, B. Güzel, H. Ben Hadid

The main objective of this work is to study experimentally the primary instability of non-Newtonian film flows down an inclined plane. We focus on low-concentration shear-thinning aqueous (...)

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 Stability of a flow down an incline with respect to two-dimensional and three-dimensional disturbances for Newtonian and non-Newtonian fluids

Article in Phys. Rev. E (2015)

Stability of a flow down an incline with respect to two-dimensional and three-dimensional disturbances for Newtonian and non-Newtonian fluids

Mohamed Hatem Allouche, Séverine Millet, Valéry Botton, Daniel Henry, Hamda Ben Hadid, and François Rousset

Squire’s theorem, which states that the two-dimensional instabilities are more dangerous than the three-dimensional instabilities, is revisited here for a flow down an incline, making use of (...)

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