论文标题
有限的超级流体湍流中的涡度锁定和压力动力学
Vorticity Locking and Pressure Dynamics in Finite-Temperature Superfluid Turbulence
论文作者
论文摘要
我们介绍了使用超流体氦的涡旋细丝模型的有限温度超流体湍流的数值研究。我们使用两种不同的外部正常流体驱动器结构，检查了广泛温度范围内正常和超流体成分之间涡度锁定的现象。我们表明，涡度锁定会随温度而增加，导致超流体流动更受正常流体特征的影响。这也导致更强的超流量极化和湍流间歇性。我们还研究了这些特性如何影响压力场，并尝试验证长期存在的$ p_k \ propto k^{ - 7/3} $在空间压力频谱中的理论量子签名。
We present a numerical study of finite-temperature superfluid turbulence using the vortex filament model for superfluid helium. We examine the phenomenon of vorticity locking between the normal and superfluid components across a wide range of temperatures, using two different structures of external normal fluid drive. We show that vorticity locking increases with temperature leading to the superfluid flow being more influenced by the characteristics of the normal fluid. This also results in stronger superfluid polarization and turbulent intermittency. We also examine how these properties influence the pressure field and attempt to verify a long-standing $P_k\propto k^{-7/3}$ theoretical quantum signature within the spatial pressure spectrum.
