论文标题
逆流引起的三维超流体湍流中的逆向能级联
Counterflow-Induced Inverse Energy Cascade in Three-Dimensional Superfluid Turbulence
论文作者
论文摘要
通常用两个不混溶的流体来描述有限温度的量子湍流，这些流体可以以非零的平均相对速度流动。这种平衡状态被称为逆流超流体湍流。我们在这里报告了反流诱导的逆向能量级联反应级联在三维超流量流中的出现，通过对Hall-Vinen-Bekarevich-Khalatnikov模型进行广泛的数值模拟。随着平均反流的强度增加，从完全三维的湍流到出现分裂级联的准二维系统的突然过渡。这项工作的发现可以激发新的实验环境，以研究大部分三维实验中的准二维超氟湍流。他们可能还会在多个流体成分描述的系统中找到超出超级流体的应用。
Finite-temperature quantum turbulence is often described in terms of two immiscible fluids that can flow with a non-zero mean relative velocity. Such out-of-equilibrium state is known as counterflow superfluid turbulence. We report here the emergence of a counterflow-induced inverse energy cascade in three-dimensional superfluid flows by performing extensive numerical simulations of the Hall-Vinen-Bekarevich-Khalatnikov model. As the intensity of the mean counterflow is increased, an abrupt transition, from a fully three-dimensional turbulent flow to a quasi two-dimensional system exhibiting a split cascade, is observed. The findings of this work could motivate new experimental settings to study quasi two-dimensional superfluid turbulence in the bulk of three-dimensional experiments. They might also find applications beyond superfluids in systems described by more than one fluid component.
