标题： 端壁效应对泰勒涡旋和螺旋涡旋之间转换的影响 显示英文标题

标题： End-wall effects on the transition between Taylor vortices and spiral vortices

摘要： 我们展示了关于轴向刚性非旋转端壁的泰勒-库埃特系统中泰勒涡旋和螺旋涡旋之间转换的数值模拟以及实验结果。 如同轴向周期情况一样，这些转换是通过从泰勒涡旋和螺旋中分别通过二次分岔出现的波状结构来实现的。 但在存在刚性盖板的情况下，纯螺旋解不会出现，而是被主要分岔出的稳定波状螺旋结构（wSPI）所替代。 与周期系统类似，我们发现通过所谓的波状泰勒涡旋（wTVF）介导了从泰勒涡旋到wSPI的转换，另一方面，由传播缺陷触发了从wSPI到TVF的转换。 此外，我们还观察并研究了wSPI从基本埃克曼流开始的主要分岔。 显示英文摘要

摘要： We present numerical simulations as well as experimental results concerning transitions between Taylor vortices and spiral vortices in the Taylor-Couette system with rigid, non-rotating end-walls in axial direction. As in the axial periodic case, these transitions are performed by wavy structures appearing via a secondary bifurcation out of Taylor vortices and spirals, respectively. But in the presence of rigid lids, pure spiral solutions do not occur but are substituted by primary bifurcating, stable wavy spiral structures (wSPI). Similarly to the periodic system, we found a transition from Taylor vortices to wSPI mediated by so called wavy Taylor vortices (wTVF) and, on the other hand, a transition from wSPI to TVF triggered by a propagating defect. We furthermore observed and investigated the primary bifurcation of wSPI out of basic Ekman flow.