2005/10/31 by Olga I. Vinogradova, Gleb E. Yakubov · 3 citations
Engineering · Materials Science · Physics and Astronomy · #Adhesion, Friction, and Surface Interactions #Particle Dynamics in Fluid Flows #Surface Modification and Superhydrophobicity #cond-mat.mtrl-sci #cond-mat.soft
paper · pdf · doi:10.1103/physreve.73.045302
Revised version
arxiv created 2006/01/10 · openalex publication_date 2006/04/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report results of investigations of a high-speed drainage of thin aqueous films squeezed between randomly nanorough surfaces. A significant decrease in the hydrodynamic resistance force as compared with that predicted by Taylor's equation is observed. However, this reduction in force does not represent the slippage. The measured force is exactly the same as that between equivalent smooth surfaces obeying no-slip boundary conditions, but located at the intermediate position between peaks and valleys of asperities. The shift in hydrodynamic thickness is shown to be independent of the separation and/or shear rate. Our results disagree with previous literature data reporting very large and shear-dependent boundary slip for similar systems.