Towards an understanding of the resolution dependence of Core-Collapse Supernova simulations
Towards an understanding of the resolution dependence of Core-Collapse Supernova simulations
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了解核心塌陷超新星模拟的分辨率依赖性
DOI:
10.1093/mnras/stz2730
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发表时间:
2019
影响因子:
4.8
通讯作者:
Vartanyan, David
中科院分区:
文献类型:
--
作者:
Nagakura, Hiroki;Burrows, Adam;Radice, David;Vartanyan, David
Using our new state-of-the-art core-collapse supernova (CCSN) codeFornax, we explore the dependence upon spatial resolution of the outcome and character of three-dimensional (3D) supernova simulations. For the same 19 M⊙progenitor star, energy and radial binning, neutrino microphysics, and nuclear equation of state, changing only the number of angular bins in the θ and ϕ directions, we witness that our lowest resolution 3D simulation does not explode. However, when jumping progressively up in resolution by factors of two in each angular direction on our spherical-polar grid, models then explode, and explode slightly more vigorously with increasing resolution. This suggests that there can be a qualitative dependence of the outcome of 3D CCSN simulations upon spatial resolution. The critical aspect of higher spatial resolution is the adequate capturing of the physics of neutrino-driven turbulence, in particular its Reynolds stress. The greater numerical viscosity of lower resolution simulations results in greater drag on the turbulent eddies that embody turbulent stress, and, hence, in a diminution of their vigor. Turbulent stress not only pushes the temporarily stalled shock further out, but bootstraps a concomitant increase in the deposited neutrino power. Both effects together lie at the core of the resolution dependence we observe.
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DOI:
10.1088/0004-637x/808/1/70
发表时间:
2014
期刊:
The Astrophysical Journal
影响因子:
--
作者:
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DOI:
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发表时间:
2017
期刊:
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影响因子:
--
作者:
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