微重力条件下尘埃晶体中慢粒子的非粘性运动
Nonviscous motion of a slow particle in the dust crystal under microgravity conditions
摘要：
利用国际空间站上的PK-3 Plus实验室研究了大颗粒在由带负电荷的小颗粒形成的尘埃晶体中的亚音速运动。追踪粒子的轨迹表明，大颗粒几乎自由地移动通过等离子体晶体的体积，而尘埃粒子沿特征的α形路径附近的大颗粒。在流体动力学近似下，我们发展了非粘性尘埃粒子绕大粒子运动的理论，并计算了粒子的运动轨迹。与实验结果的一致性验证了我们的方法。
英文摘要：
Subsonic motion of a large particle moving through the bulk of a dust crystal formed by negatively charged small particles is investigated using the PK-3 Plus laboratory onboard the International Space Station. Tracing the particle trajectories show that the large particle moves almost freely through the bulk of plasma crystal, while dust particles move along characteristic alpha-shaped pathways near the large particle. In the hydrodynamic approximation, we develop a theory of nonviscous dust particles motion about a large particle and calculate particle trajectories. A good agreement with experiment validates our approach.
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