Low-velocity collision behaviour of clusters composed of sub-millimetre sized dust aggregates
Low-velocity collision behaviour of clusters composed of sub-millimetre sized dust aggregates
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亚毫米级尘埃聚集体团簇的低速碰撞行为
DOI：
10.1051/0004-6361/201630345
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发表时间：
2017
影响因子：
6.5
通讯作者：
Weidling
中科院分区：
文献类型：
--
作者：
Brisset;Heißelmann;Weidling
提出的实验旨在测量亚毫米大小的原行星尘埃聚集体类似物之间碰撞的结果。我们还观察了这些聚集体形成的团簇及其碰撞行为。实验在不莱梅的落塔中进行。原行星尘埃模拟材料是将单分散和多分散的SiO_2颗粒制备成粒径在120~ 250 μ m之间的聚集体。其中一个灰尘样本含有以前通过反复弹跳压实的聚集体。在三次每次9秒的微重力飞行中，观察到聚集体之间的单独碰撞和最大几毫米大小的聚集体的形成。此外，还记录了团簇与实验细胞壁的碰撞导致的致密化或碎裂。我们观察到尘埃聚集体之间的碰撞和尘埃团与细胞铝壁之间的碰撞，速度范围从约0.1厘米/秒至20厘米/秒。对于由单分散性粉尘组成的聚集体，发生粘附的速度范围为0.18至5.0 cm/s，对于约化质量范围为1.2 × 10 -6至1.8 × 10 -3 g的平均值为2.2 × 10 -4 g的平均值为2.1 cm/s。从尘埃聚集体与铝细胞壁碰撞所形成的团簇的重组和破碎，我们根据Dominik \& Thielens（1997）为微观粒子开发的模型导出了尘埃聚集体（100 m）的碰撞配方。我们测得的临界滚动能量为1.8 × 10 ~（-13）J和临界破碎能量为3.5 × 10 ~（-13）J的100米大小的非压实骨料。
The experiments presented aim to measure the outcome of collisions between sub-mm sized protoplanetary dust aggregate analogues. We also observed the clusters formed from these aggregates and their collision behaviour. The experiments were performed at the drop tower in Bremen. The protoplanetary dust analogue materials were micrometre-sized monodisperse and polydisperse SiOparticles prepared into aggregates with sizes between 120~m and 250~m. One of the dust samples contained aggregates that were previously compacted through repeated bouncing. During three flights of 9~s of microgravity each, individual collisions between aggregates and the formation of clusters of up to a few millimetres in size were observed. In addition, the collisions of clusters with the experiment cell walls leading to compaction or fragmentation were recorded. We observed collisions amongst dust aggregates and collisions between dust clusters and the cell aluminium walls at speeds ranging from about 0.1 cm/s to 20 cm/s. The velocities at which sticking occurred ranged from 0.18 to 5.0 cm/s for aggregates composed of monodisperse dust, with an average value of 2.1 cm/s for reduced masses ranging from 1.2x10-6 to 1.8x10-3 g with an average value of 2.2x10-4 g. From the restructuring and fragmentation of clusters composed of dust aggregates colliding with the aluminium cell walls, we derived a collision recipe for dust aggregates (100m) following the model of Dominik \& Thielens (1997) developed for microscopic particles. We measured a critical rolling energy of 1.8x10-13 J and a critical breaking energy of 3.5x10-13 J for 100m-sized non-compacted aggregates.
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影响因子：
4.9
作者：
Beitz, E.;Guettler, C.;Wurm, G.
通讯作者：
Wurm, G.
早期太阳星云中聚合体-聚合体碰撞的实验研究
影响因子：
3.2
作者：
J. Blum;M. Münch
通讯作者：
M. Münch
多孔粉尘团块的压缩行为
影响因子：
6.5
作者：
Seizinger;Speith
通讯作者：
Speith
亚轨道粒子聚集和碰撞实验 (SPACE)：研究 REXUS 12 亚轨道火箭飞行中亚毫米级尘埃聚集体的碰撞行为。
DOI：
10.1063/1.4819443
发表时间：
2013
期刊：
The Review of scientific instruments
影响因子：
--
作者：
J. Brisset;D. Heißelmann;S. Kothe;R. Weidling;J. Blum
通讯作者：
J. Blum
亚毫米级尘埃聚集体碰撞与生长特性——亚轨道火箭多粒子系统实验研究
影响因子：
6.5
作者：
Brisset;Heißelmann;Weidling
通讯作者：
Weidling