Note on the Early Thermoelastic Stage Preceding Rayleigh–Bénard Convection in Soft Materials

Autor: Rachid Rahouadj, Chérif Nouar, Antonio Pereira

Publikováno v: Fluids, Vol 7, Iss 7, p 231 (2022)

In this paper, we focus on the first stage of transition to Rayleigh–Bénard convection in soft-jammed systems (yield stress fluids) confined in a parallelepiped box heated from the bottom. Up to yielding, the material is in a solid-state with a co

Externí odkaz: https://doaj.org/article/e8ade3238dcb4a5ab6c487b0851cfce7

Rayleigh-Bénard convection in non-Newtonian fluids: Experimental and theoretical investigations

Autor: Mondher Bouteraa, Simon Becker, Jamal Ouhajjou, Thomas Varé, Chérif Nouar

Publikováno v: Physics of Fluids
Physics of Fluids, American Institute of Physics, 2021, 33, pp.114112. ⟨10.1063/5.0070983⟩

We present an experimental and theoretical study of Rayleigh–Benard convection in shear-thinning fluids with temperature-dependent properties. Experiments were performed using a cylindrical cell with a radius R=60 mm and height adjustable at d=15 a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6f53f2a4982fba50a32b4ccfb2ebdef4
https://hal.archives-ouvertes.fr/hal-03454578

Taylor-vortex flow in shear-thinning fluids

Autor: D Bernardin, A Neveu, Chérif Nouar, Seyed Amir Bahrani, S Topayev

Publikováno v: Physical Review E : Statistical, Nonlinear, and Soft Matter Physics
Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, American Physical Society, 2019, ⟨10.1103/PhysRevE.100.023117⟩

International audience; The present paper deals with the Taylor-Couette flow of shear-thinning fluids. It focuses on the first principles understanding the influence of the viscosity stratification and the nonlinear variation of the effective viscosi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8908eaea37553f32c4b5fe91735f69b2
https://doi.org/10.1103/physreve.100.023117

Instabilities of convection patterns in a shear-thinning fluid between plates of finite conductivity

Autor: Chérif Nouar, Thomas Varé, Christel Métivier

Publikováno v: Physical Review E
Physical Review E, American Physical Society (APS), 2017, 96 (4), pp.43109-43109. ⟨10.1103/PhysRevE.96.043109⟩

International audience; Rayleigh-Bénard convection in a horizontal layer of a non-Newtonian fluid between slabs of arbitrary thickness and finite thermal conductivity is considered. The first part of the paper deals with the primary bifurcation and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1158101f313a3a6e202087e93ad0081f
https://hal.univ-lorraine.fr/hal-02442198

Energy growth in Hagen-Poiseuille flow of Herschel-Bulkley fluid

Autor: Chérif Nouar, Ahmed Esmael, Hocine Bentrad, Alain Lefevre, Noureddine Ait-Messaoudene

Publikováno v: Journal of Non-Newtonian Fluid Mechanics
Journal of Non-Newtonian Fluid Mechanics, Elsevier, 2017, 241, pp.43-59. ⟨10.1016/j.jnnfm.2017.01.007⟩

Linear stability of Poiseuille flow of Herschel–Bulkley fluid in a cylindrical pipe is studied using modal and non-modal approaches. The first part of the present study thus deals with the classical normal mode approach in which the resulting eigen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::817b08c19643381f78b832ccc96bb16f
https://hal.archives-ouvertes.fr/hal-02447064