Slip at Fluid-Solid Interface

TL;DR

This paper reviews the phenomenon of slip at fluid-solid interfaces, emphasizing its significance in non-Newtonian fluid flow, its impact on flow behavior, and the challenges it poses to accurate analysis and modeling.

Contribution

It provides a comprehensive discussion on the main issues and implications of wall slip at fluid-solid interfaces, highlighting its complexity and practical importance.

Findings

Wall slip can cause flow instabilities and measurement errors.

Slip phenomena are especially significant in non-Newtonian fluids.

Understanding slip is crucial for accurate fluid system analysis.

Abstract

The `no-slip' is a fundamental assumption and generally-accepted boundary condition in rheology, tribology and fluid mechanics with strong experimental support. The violations of this condition, however, are widely recognized in many situations, especially in the flow of non-Newtonian fluids. Wall slip could lead to large errors and flow instabilities, such as sharkskin formation and spurt flow, and hence complicates the analysis of fluid systems and introduces serious practical difficulties. In this article, we discuss slip at fluid-solid interface in an attempt to highlight the main issues related to this diverse complex phenomenon and its implications.