Abstract

The phenomenon of a precursor spreading in front of an advancing droplet is still not fully understood. We recently used a driven lattice-gas model to study the microscopic dynamics of thin film spreading. We found that the scaling exponents describing the dynamics of both the precursor and the bulk layers are not universal, and strongly depend on the parameters describing the various interactions in the system. In this paper we show yet another nontrivial and rich behavior of the system. This is the non-monotonicity of the exponents, which reflects the competition between the various mechanisms that drive the system. In particular, we study the dependence of the scaling exponents on the ratio of the external substrate potential and the internal short-range interactions that drive the spreading in both layers.

Graphic Abstract

中文翻译：

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薄膜铺展的非单调动力学

摘要

仍未完全理解前体在前进的液滴之前扩散的现象。我们最近使用了驱动的晶格气体模型来研究薄膜扩散的微观动力学。我们发现描述前驱体和块体层动力学的缩放指数不是通用的，并且在很大程度上取决于描述系统中各种相互作用的参数。在本文中，我们展示了该系统的又一个平凡而丰富的行为。这是指数的非单调性，反映了驱动系统的各种机制之间的竞争。特别地，我们研究了尺度指数对外部衬底电势和驱动两层扩展的内部短程相互作用之比的依赖性。

图形摘要