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arXiv cond-mat/9810316cond-mat.soft
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弯曲表面附近的棒状颗粒流体

Fluids of rod-like particles near curved surfaces

B. Groh, S. Dietrich

摘要:

我们研究流体的硬杆在附近的硬球和圆柱表面的密度低于各向同性的过渡。应用Onsager第二维里近似,这是已知的,以产生精确的结果,在无限细棒的限制散装性能。这种方法需要计算的单粒子分布函数和迈耶函数,这是大大方便了适当的扩展方面的球谐函数。我们确定密度和取向的配置文件,以及作为表面曲率半径$R$的函数的表面张力$γ$。已经在低密度限制的非相互作用棒$γ(R)$原来是非解析的$1/R=0$,这禁止了应用程序的常用Helfrich扩展。与低密度极限相比,颗粒间相互作用在定量和定性上改变了$γ(R)$的行为。

英文摘要:

We study fluids of hard rods in the vicinity of hard spherical and cylindrical surfaces at densities below the isotropic-nematic transition. The Onsager second virial approximation is applied, which is known to yield exact results for the bulk properties in the limit of infinitely thin rods. This approach requires the computation of the one-particle distribution function and of the Mayer function which is greatly facilitated by an appropriate expansion in terms of spherical harmonics. We determine density and orientational profiles as well as the surface tension $γ$ as function of the surface curvature radius $R$. Already in the low-density limit of non-interacting rods $γ(R)$ turns out to be non-analytic at $1/R=0$, which prohibits the application of the commonly used Helfrich expansion. The interparticle interaction modifies the behavior of $γ(R)$ as compared to the low-density limit quantitatively and qualitatively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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