Experimental study of clusters in dense granular gas and implications for the particle stopping time in protoplanetary disks
Experimental study of clusters in dense granular gas and implications for the particle stopping time in protoplanetary disks
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致密颗粒气体中团簇的实验研究及其对原行星盘中粒子停止时间的影响
DOI:
10.1016/j.icarus.2021.114307
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
G. Wurm
中科院分区:
文献类型:
--
作者:
N. Schneider;G. Musiolik;J. E. Kollmer;T. Steinpilz;M. Kruss;F. Jungmann;T. Demirci;J. Teiser;G. Wurm
In protoplanetary disks, zones of dense particle configuration promote planet formation. Solid particles in dense clouds alter their motion through collective effects and back reaction to the gas. The effect of particle-gas feedback with an ambient solid-to-gas ratios ϵ> 1 on the stopping time of particles is investigated. In experiments on board the International Space Station we studied the evolution of a dense granular gas while interacting with air. We observed diffusion of clusters released at the onset of an experiment but also the formation of new dynamical clusters. The solid-to-gas mass ratio outside the cluster varied in the range of about ϵ avg~ 2.5–60. We find that the concept of gas drag in a viscous medium still holds, even if the medium is strongly dominated in mass by solids. However, a collective factor has to be used, depending on ϵ avg, ie the drag force is reduced by a factor 18 at the highest mass ratios. Therefore, flocks of grains in protoplanetary disks move faster and collide faster than their constituents might suggest.
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DOI:
10.3847/0004-637x/827/2/110
发表时间:
2016
期刊:
The Astrophysical Journal
影响因子:
--
作者:
M. Kruss;T. Demirci;M. Koester;T. Kelling;G. Wurm
通讯作者:
G. Wurm
影响因子:
1.6
作者:
T. Steinpilz;G. Musiolik;M. Kruss;F. Jungmann;T. Demirci;M. Aderholz;J. E. Kollmer;J. Teiser;T. Bila;E. Guay;G. Wurm
通讯作者:
G. Wurm
DOI:
10.3847/2041-8213/ab55e0
发表时间:
2019
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
N. Schneider;G. Wurm
通讯作者:
G. Wurm
DOI:
10.1088/0004-637x/783/2/111
发表时间:
2014
期刊:
The Astrophysical Journal
影响因子:
--
作者:
T. Kelling;G. Wurm;M. Köster
通讯作者:
M. Köster
影响因子:
4.8
作者:
F. Pignatale;Jean;Nicolas Cuello;B. Bourdon;C. Fitoussi
通讯作者:
C. Fitoussi