Modeling the friction between solid-liquid two-phase flow and multi-asperity surface: Taking magnetic fluid as an example

Abstract

Reducing the friction drag at the solid-liquid interface has been an objective pursued for centuries. Rheological experiments show that friction drag between magnetic fluid and solid surface decreases and then increases with surface roughness under different magnetic fields. We established a friction model for magnetic fluid two-phase flow with rough surfaces, integrating carrier fluid flow resistance (F₁), shear fracture force of field-induced structure (F₂), and adhesion friction of field-induced structure (F₃). This model quantitatively calculates friction drag, aligning well with experimental results. This paper opens up a new perspective for understanding the friction drag between solid-liquid two-phase flow and solid interface, providing an inspirational theoretical basis for drag reduction of solid-liquid two-phase flow.