We report interpenetrating spiral vortices (ISV), a coexisting state of upward and downward propagating spiral/helical vortices, in a neutrally-buoyant suspension undergoing Taylor-Couette flow, with the inner cylinder rotating and the outer cylinder at rest. Along with ISV and Taylor vortex flow (TVF), the non-axisymmetric patterns, such as the wavy Taylor vortices (WTV) and spiral vortex flows (SVF), and the co-existing states of TVF+WTV' andTVF+SVF’ are also uncovered. It is shown that the `TVF+SVF’ pattern appears as a primary transition, which gives birth to interpenetrating spirals as a secondary transition beyond a critical Reynolds number, with the final state being that of WTV over a range of particle volume fractions and Reynolds number.

中文翻译：

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悬浮泰勒-库埃特流中互穿的螺旋涡旋和其他共存状态

我们报告了互穿的螺旋涡流（ISV），这是一种向上和向下传播的螺旋/螺旋涡流并存的状态，它在中性浮力悬架中经历泰勒-库埃特流，内筒旋转而外筒静止。除了ISV和泰勒涡流（TVF）之外，还发现了非轴对称模式，例如波浪状的泰勒涡流（WTV）和螺旋涡流（SVF），以及TVF+WTV' andTVF + SVF'的共存状态。结果表明，“ TVF + SVF”模式是一次过渡，它产生了互穿螺旋，而二次螺旋超出了临界雷诺数，最终状态是WTV在一定的粒子体积分数和雷诺范围内的状态。数。