标题： 相对论性热气体湍流中的普遍性和间歇性 显示英文标题

标题： Universality and intermittency in relativistic turbulent flows of a hot gas

摘要： 为了确定相对论湍流的统计特性并揭示新颖的非经典特征，我们使用高阶数值方案展示了在超相对论性热等离子体中驱动湍流的直接数值模拟结果。 我们研究了平均马赫数从$\sim 0.4$到$\sim 1.7$以及平均洛伦兹因子高达$\sim 1.7$的流动的统计特性。 我们发现，即使在亚音速情况下，流动量如能量密度或局部洛伦兹因子也表现出较大的空间方差，因为相对论效应增强了压缩性。 速度场具有高度间歇性，但其功率谱与科莫戈罗夫经典理论的预测结果相符。 显示英文摘要

摘要： With the aim of determining the statistical properties of relativistic turbulence and unveiling novel and non-classical features, we present the results of direct numerical simulations of driven turbulence in an ultrarelativistic hot plasma using high-order numerical schemes. We study the statistical properties of flows with average Mach number ranging from $\sim 0.4$ to $\sim 1.7$ and with average Lorentz factors up to $\sim 1.7$. We find that flow quantities, such as the energy density or the local Lorentz factor, show large spatial variance even in the subsonic case as compressibility is enhanced by relativistic effects. The velocity field is highly intermittent, but its power-spectrum is found to be in good agreement with the predictions of the classical theory of Kolmogorov.