Granular mechanics simulations of collisions between chondritic aggregates
Granular mechanics simulations of collisions between chondritic aggregates
复制标题
球粒状聚集体之间碰撞的颗粒力学模拟
DOI:
10.1051/0004-6361/202141581
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发表时间:
2021
影响因子:
6.5
通讯作者:
H. Urbassek
中科院分区:
文献类型:
--
作者:
P. Umstätter;H. Urbassek
Context. Collisions of dust aggregates are relevant for the evolution of protoplanetary disks.
Aims. While in the past interest focused on aggregates composed of monodisperse grains, here we study the collision of chondritic aggregates, in which – besides a majority of dust grains – larger chondrules are embedded.
Methods. We use granular-mechanics simulations to study collisions of chondritic aggregates.
Results. Low-velocity collisions lead to pancake-shaped deformations of the fused cluster accompanied by a compaction of the dust grains. Higher collision velocities fragment the aggregates. While some chondrules are almost laid bare after the collision, we find that the largest fragments typically contain chondrules; large fragments thus capture chondrules. Grain compaction is accompanied by an increase in grain – chondrule contacts and is maximum for intermediate velocities, just before aggregates start fragmenting.
Conclusions. The presence of chondrules considerably influences the fragmentation behavior of dust aggregates.
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
D. Paszun;C. Dominik
通讯作者:
C. Dominik
影响因子:
3.2
作者:
Blum, J;Wurm, G
通讯作者:
Wurm, G
DOI:
10.3847/1538-4357/aa8564
发表时间:
2017
期刊:
The Astrophysical Journal
影响因子:
--
作者:
S. Arakawa;M. Tatsuuma;N. Sakatani;T. Nakamoto;Sota Arakawa
通讯作者:
Sota Arakawa