论文标题
分子气中的尺寸 - 聚糖灰尘：能量均衡与非设备
Size-polydisperse dust in molecular gas: Energy equipartition versus non-equipartition
论文作者
论文摘要
我们在数值和分析大小的聚糖颗粒混合物中研究浸入分子气体中。我们表明，建立了不同大小颗粒的颗粒温度的平选。但是，颗粒温度与分子气体温度显着不同。这个结果令人惊讶，因为通常，在驱动的颗粒混合物中，能量电均受到强烈侵犯。定性地，获得的结果不取决于碰撞模型，对于持续的恢复系数$ \ varepsilon $以及粘弹性粒子的$ \ varepsilon $有效。我们的发现对于天体物理应用可能很重要，例如原星盘，星际尘埃云和彗星。
We investigate numerically and analytically size-polydisperse granular mixtures immersed into a molecular gas. We show that the equipartition of granular temperatures of particles of different sizes is established; however, the granular temperatures significantly differ from the temperature of the molecular gas. This result is surprising since, generally, the energy equipartition is strongly violated in driven granular mixtures. Qualitatively, the obtained results do not depend on the collision model, being valid for a constant restitution coefficient $\varepsilon$, as well as for the $\varepsilon$ for viscoelastic particles. Our findings may be important for astrophysical applications, such as protoplanetary disks, interstellar dust clouds, and comets.
