title: Transition to turbulence in a flow of a shear-thinning viscoelastic solution in a Taylor-Couette cell.
abstract: The transition to turbulence in a flow of semidilute shear-thinning viscoelastic solution with a moderate elasticity was investigated in the Taylor-Couette system with a fixed outer cylinder. As the cylinder rotation frequency increases, the base flow bifurcates to a pattern of ribbons and then to disordered oscillations (DOs). Within these DOs, we have identified two particular regimes of turbulence: spatiotemporal intermittency (STI) followed by inertioelastic turbulence (IET) with a net transition between them. This transition is evidenced by a sharp peak of a diffusion velocity and a Weissenberg number.
authors.affiliation: Laboratoire Brestois de Mécanique et des Systèmes (LBMS), Equipe d'Accueil 4325, Université de Brest, BP 93169, 29231 Brest Cedex 3, France.
authors.forename: Noureddine
authors.initials: N
authors.lastname: Latrache
authors.forename: Olivier
authors.initials: O
authors.lastname: Crumeyrolle
authors.forename: Innocent
authors.initials: I
authors.lastname: Mutabazi
mesh_terms: D003198:Computer Simulation; D004548:Elasticity; D008956:Models, Chemical; D017711:Nonlinear Dynamics; D012212:Rheology / Q000379:methods*; D033081:Shear Strength; D012996:Solutions / Q000737:chemistry*; D014783:Viscosity
chemical_list: D012996:Solutions