Cooling-driven coagulation
Cooling-driven coagulation
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冷却驱动凝固
DOI:
10.1093/mnras/stad1874
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发表时间:
2023
影响因子:
4.8
通讯作者:
Oh, S. Peng
中科院分区:
文献类型:
--
作者:
Gronke, Max;Oh, S. Peng
Astrophysical gases such as the interstellar-, circumgalactic-, or intracluster-medium are commonly multiphase, which poses the question of the structure of these systems. While there are many known processes leading to fragmentation of cold gas embedded in a (turbulent) hot medium, in this work, we focus on the reverse process: coagulation. This is often seen in wind-tunnel and shearing layer simulations, where cold gas fragments spontaneously coalesce. Using 2D and 3D hydrodynamical simulations, we find that sufficiently large (≫cstcool), perturbed cold gas clouds develop pulsations which ensure cold gas mass growth over an extended period of time (≫r/cs). This mass growth efficiently accelerates hot gas which in turn can entrain cold droplets, leading to coagulation. The attractive inverse square force between cold gas droplets has interesting parallels with gravity; the ‘monopole’ is surface area rather than mass. We develop a simple analytic model which reproduces our numerical findings.
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影响因子:
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通讯作者:
Vijit Kanjilal;Alankar Dutta;P. Sharma
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DOI:
--
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期刊:
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DOI:
10.1086/382478
发表时间:
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期刊:
The Astrophysical Journal Letters
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DOI:
10.3847/1538-4357/abbad2
发表时间:
2020
期刊:
The Astrophysical Journal
影响因子:
--
作者:
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通讯作者:
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