致密二元偶极流体混合物剪切粘度的动力学理论
Kinetic Theory for the Shear Viscosity of Dense Binary Dipolar Fluid Mixtures
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中文总结 AI 辅助
研究致密二元偶极流体混合物剪切粘度，基于恩斯科格 - 索恩理论等构建动力学理论，推导对关联表达式，通过与分子动力学模拟结果比较，其表达式在一定堆积分数下捕捉到二元偶极流体相关行为且无需混合物拟合参数。
中文摘要 AI 辅助
我们为强相互作用偶极硬球的致密二元流体混合物的剪切粘度构建了一个动力学理论。我们推导了二元混合物中对关联的表达式，该表达式在堆积分数约为0.35时是准确的。该方法基于恩斯科格 - 索恩理论，并受到普萨内和德维恩为致密纯流体所发展理论的启发。它依赖于从纯流体获得的有效耦合参数、混合规则以及碰撞积分的启发式表达式。我们将结果与偶极硬球流体分子动力学模拟得到的粘度进行比较。我们对二元混合物剪切粘度的表达式在堆积分数$\xi \lesssim 0.3$时捕捉到了二元偶极流体密度和成分依赖的行为，且无需任何混合物衍生的拟合参数。
英文摘要
We construct a kinetic theory for the shear viscosity of dense binary fluid mixtures of strongly-interacting dipolar hard spheres. We derive an expression for the pairwise correlations in the binary mixtures that is accurate up to packing fractions around 0.35. The approach is based on Enskog-Thorne theory, and inspired by the theory for dense pure fluids developed by Pousaneh and de Wijn. It relies on effective coupling parameters obtained from the pure fluids combined with mixing rules and a heuristic expression for the collision integral. We compare our results to viscosities obtained numerically from molecular-dynamics simulations of dipolar hard-sphere fluids. Our expression for the shear viscosity of the binary mixtures captures the density and composition dependent behavior of the binary dipolar fluids up to packing fraction of $ξ\lesssim 0.3$ without any mixture-derived fit parameters.
