Latrache Noureddine, Crumeyrolle Olivier, Mutabazi Innocent
Laboratoire Brestois de Mécanique et des Systèmes (LBMS), Equipe d'Accueil 4325, Université de Brest, BP 93169, 29231 Brest Cedex 3, France.
Phys Rev E Stat Nonlin Soft Matter Phys. 2012 Nov;86(5 Pt 2):056305. doi: 10.1103/PhysRevE.86.056305. Epub 2012 Nov 12.
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.
在具有固定外圆柱的泰勒-库埃特系统中，研究了具有适度弹性的半稀释剪切变稀粘弹性溶液流动向湍流的转变。随着圆柱旋转频率的增加，基流向带状模式分叉，然后向无序振荡（DOs）转变。在这些无序振荡中，我们识别出了两种特定的湍流状态：时空间歇性（STI），随后是惯性弹性湍流（IET），它们之间存在净转变。这种转变通过扩散速度和魏森贝格数的尖锐峰值得以证明。
