Complex plasma mixtures with three or more components are often encountered in astrophysics or in inertial confinement fusion (ICF) experiments. For mixtures containing species with large differences in atomic number Z, the modeling needs to consider at the same time the kinetic theory for low-Z elements combined with the theory of strongly coupled plasma for high-Z elements, as well as all the intermediate situations that can appear in multicomponent systems. For such cases, we study the pair distribution functions, self-diffusions, mutual diffusion, and viscosity for ternary mixtures at extreme conditions. These quantities can be produced from first principles using orbital free molecular dynamics at the computational expense of very intensive simulations to reach good statistics. Utilizing the first-principles results as reference data, we assess the merit of a global analytic model for transport coefficients, “pseudo-ions in jellium” (PIJ), based on an isoelectronic assumption (iso-${\mathrm{n}}_e$). With a multicomponent hypernetted-chain integral equation, we verify the quality of the iso-${\mathrm{n}}_e$ prescription for describing the static structure of the mixtures. This semianalytical modeling compares well with the simulation results and allows one to consider plasma mixtures not accessible to simulations. Applications are given for the mix of materials in ICF experiments. A reduction of a multicomponent mixture to an effective binary mixture is also established in the hydrodynamic limit and compared with PIJ estimations for ICF relevant mixtures.

中文翻译：

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多离子等离子体混合物的静态和动态特性

在天体物理学或惯性约束聚变（ICF）实验中经常遇到具有三种或三种以上成分的复杂等离子体混合物。对于包含原子序数Z差异较大的物质的混合物，建模时需要同时考虑低Z元素的动力学理论和高Z元素的强耦合等离子体理论以及所有中间情况可以出现在多组件系统中。对于这种情况，我们研究了极端条件下三元混合物的对分布函数，自扩散，互扩散和粘度。这些量可以使用轨道自由分子动力学从第一原理产生，但要花费大量的模拟才能获得良好的统计数据。利用第一原理的结果作为参考数据，等值${\mathrm{ñ}}_{Ë}$）。利用多分量超网状链积分方程，我们验证了iso-${\mathrm{ñ}}_{Ë}$ 描述混合物静态结构的处方。这种半分析模型与模拟结果具有很好的对比，并允许人们考虑模拟无​​法获得的血浆混合物。在ICF实验中给出了混合材料的应用。还确定了在水动力极限中将多组分混合物还原为有效的二元混合物，并将其与ICF相关混合物的PIJ估计值进行了比较。