圆柱体热逆流中的法向流体涡
Normal fluid eddies in the thermal counterflow past a cylinder
摘要：
最近的粒子图像测速（PIV）实验在He II逆流绕圆柱形障碍物表明存在明显的固定正常流体ddie下游（在后方）和上游（在前面）的圆柱。这个相当令人惊讶的结果在经典流体流动的实验观察中没有类似的结果。我们认为，这种涡的表观稳定性的解释可以完全从经典流体动力学的观点提供。我们还讨论了超流中正常流体涡旋的出现与涡旋纠缠极化之间的可能联系。
英文摘要：
A recent Particle Image Velocimetry (PIV) experiment in He II counterflow around a cylindrical obstacle showed the existence of apparently stationary normal fluid ddies both downstream (at the rear) and upstream (in front) of the cylinder. This rather surprising result does not have an analogue in experimental observations of classical fluid flows. We suggest that the explanation for the apparent stability of such eddies can be provided entirely from the viewpoint of classical fluid dynamics. We also discuss a possible connection between the emergence of the normal fluid eddies and the polarization of the vortex tangle in superfluid.
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