Turbulent radial thermal counterflow in the framework of the HVBK model
Turbulent radial thermal counterflow in the framework of the HVBK model
复制标题
HVBK 模型框架中的湍流径向热逆流
DOI：
10.1209/0295-5075/128/26001
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
C. Barenghi
中科院分区：
文献类型：
--
作者：
Y. Sergeev;C. Barenghi
我们应用粗粒Hall-Vinen-Bekarevich-Khalatnikov(HVBK)方程来模拟统计定常的、湍流的、圆柱对称的径向逆流，这种逆流是由浸没在超流4He中的圆柱体表面的中等大热流产生的。我们证明，只有当考虑了温度的空间不均匀性和热力学性质对温度的依赖时，才存在与时间无关的解。给出了壁面厚度随温度变化的热边界层的形成过程，分析了径向流动的特性，包括局部平均涡线密度。
We apply the coarse-grained Hall-Vinen-Bekarevich-Khalatnikov (HVBK) equations to model the statistically steady-state, turbulent, cylindrically symmetric radial counterflow generated by a moderately large heat flux from the surface of a cylinder immersed in superfluid 4He. We show that a time-independent solution exists only if a spatial non-uniformity of temperature and the dependence on temperature of the thermodynamic properties are accounted for. We demonstrate the formation of a thermal boundary layer whose thickness grows with temperature of the cylinder's surface, and analyze the properties of the flow in the radial direction, including the local average vortex line density.