AB INITIO SIMULATIONS FOR MATERIAL PROPERTIES ALONG THE JUPITER ADIABAT
AB INITIO SIMULATIONS FOR MATERIAL PROPERTIES ALONG THE JUPITER ADIABAT
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DOI：
10.1088/0067-0049/202/1/5
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发表时间：
2012-09-01
影响因子：
8.7
通讯作者：
Redmer, Ronald
中科院分区：
文献类型：
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作者：
French, Martin;Becker, Andreas;Redmer, Ronald
我们通过从头开始模拟，确定了木星绝热沿线极端条件下氢-氦-水混合物的基本热力学和输运特性，这些模拟被编译成准确且一致的数据集。特别是，我们计算了核的电导率和热导率、剪切和纵向粘度以及扩散系数。我们给出了相关量的结果，例如取自最先进的内部结构模型的磁扩散率、热扩散率以及沿着绝热棒的运动剪切粘度。此外，还计算了热容、热膨胀系数、等温压缩性、Gruneisen 参数和声速。我们发现，氢在大约 0.9 个木星半径处开始解离和电离，标志着材料特性发生剧烈变化的区域。在电子简并的内部深处，许多材料特性保持相对恒定。我们的从头算数据将为需要准确了解木星内部材料特性的应用（例如发电机模型）奠定坚实的基础。
We determine basic thermodynamic and transport properties of hydrogen-helium-water mixtures for the extreme conditions along Jupiter's adiabat via ab initio simulations, which are compiled in an accurate and consistent data set. In particular, we calculate the electrical and thermal conductivity, the shear and longitudinal viscosity, and diffusion coefficients of the nuclei. We present results for associated quantities like the magnetic and thermal diffusivity and the kinematic shear viscosity along an adiabat that is taken from a state-of-the-art interior structure model. Furthermore, the heat capacities, the thermal expansion coefficient, the isothermal compressibility, the Gruneisen parameter, and the speed of sound are calculated. We find that the onset of dissociation and ionization of hydrogen at about 0.9 Jupiter radii marks a region where the material properties change drastically. In the deep interior, where the electrons are degenerate, many of the material properties remain relatively constant. Our ab initio data will serve as a robust foundation for applications that require accurate knowledge of the material properties in Jupiter's interior, e.g., models for the dynamo generation.