Imbibition through an array of triangular posts

TL;DR

This paper investigates how a fluid spreads on a hydrophilic surface patterned with triangular posts, revealing that the shape causes anisotropic spreading influenced by pinning effects, supported by simulation results.

Contribution

It introduces a detailed simulation study of fluid imbibition on patterned surfaces with triangular posts, highlighting the impact of shape-induced anisotropy and pinning mechanisms.

Findings

Shape of posts causes anisotropic spreading.

Pinning effects influence the advancing front.

Simulation results support the observed behaviors.

Abstract

We present and interpret simulation results showing how a fluid moves on a hydrophilic substrate patterned by a square array of triangular posts. We demonstrate that the shape of the posts leads to anisotropic spreading, and discuss how this is influenced by the different ways in which the posts can pin the advancing front.