Collisions between Sintered Icy Aggregates
Collisions between Sintered Icy Aggregates
复制标题
烧结冰骨料之间的碰撞
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
H. Ueno
中科院分区：
文献类型：
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作者：
S. Sirono;H. Ueno
对烧结冰尘聚集体之间的碰撞进行了数值模拟。如果冰骨料的温度足够高，烧结就会促进分子传输，相邻颗粒之间的颈就会生长。这种生长改变了颈部的机械反应。我们将这种效应包含在模拟代码中，并进行了碰撞模拟。对于多孔骨料，生长临界速度（低于该速度骨料质量增加）从非烧结情况的 50 m s−1 降低至 20 m s−1。对于压实的骨料，主要的碰撞结果是弹跳。这些结果来自于颈部强度通过烧结而增加的事实。数值结果表明，冰晶粒聚集体的碰撞生长受到烧结的强烈影响。
Collisions between sintered icy dust aggregates are numerically simulated. If the temperature of an icy aggregate is sufficiently high, sintering promotes molecular transport and a neck between adjacent grains grows. This growth changes the mechanical responses of the neck. We included this effect in a simulation code, and conducted collisional simulations. For porous aggregates, the critical velocity for growth, below which the mass of an aggregate increases, decreased from 50 m s−1 for the non-sintered case to 20 m s−1. For compacted aggregates, the main collisional outcome is bouncing. These results come from the fact that the strength of the neck is increased by sintering. The numerical results suggest that the collisional growth of icy grain aggregates is strongly affected by sintering.
影响因子：
3.4
作者：
Krijt, S.;Guettler, C.;Tielens, A. G. G. M.
通讯作者：
Tielens, A. G. G. M.