Comments on "Effects of wall roughness on flow in nanochannels"

TL;DR

This paper critically discusses the findings of Sofos et al. on wall roughness effects in nanochannel flow, focusing on the monotonicity of slip length and providing potential explanations for observed differences.

Contribution

It offers a commentary on previous numerical simulations, highlighting differences in slip length behavior and proposing possible explanations for these discrepancies.

Findings

Identifies non-monotonic behavior of slip length in certain conditions

Suggests alternative explanations for slip length variations

Highlights differences from previous simulation results

Abstract

We make remarks on Sofos {\it et al.}'s [{\it Phys. Rev. E} 79, 026305 (2009)] paper. The focus is about the monotonicity of the slip length of which it is different from previous similar numerical simulation. We also offer a possible explanation for this.