中性气体中吸附尘埃颗粒的旋转动力学
Rotational kinetics of absorbing dust grains in neutral gas
摘要：
我们研究了大量颗粒（尘埃颗粒）吸收周围气体的旋转和平移动力学。导出了微观相密度方程，从而得到尘埃成分的福克-普朗克方程。结果表明，虽然没有固定的分布，尘埃的平移和旋转的温度趋于一定的值，这不同于环境气体的温度。讨论了晶粒内部结构对旋转动力学的影响。
英文摘要：
We study the rotational and translational kinetics of massive particulates (dust grains) absorbing the ambient gas. Equations for microscopic phase densities are deduced resulting in the Fokker-Planck equation for the dust component. It is shown that although there is no stationary distribution, the translational and rotational temperatures of dust tend to certain values, which differ from the temperature of the ambient gas. The influence of the inner structure of grains on rotational kinetics is also discussed.
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