Anomalous boundary behavior of non-Newtonian fluids on amphiphobic surfaces

Xingwei Wang, Luyao Bao, Jun Wen, Daniele Dini, Jianbin Zhang, Li Sun, Wufang Yang, Feng Zhou, Weimin Liu

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

In this work, the effect of amphiphobic surfaces on the rheological behavior and boundary slip of the shear thickening fluids (STFs) was investigated. The experimental results suggested the viscosities were diminished, shear thickening was delayed and weakened, and an ultrahigh drag reduction was obtained. Furthermore, slip length was observed to vary with shear rate. Dissipative particle dynamics (DPD) simulations were adopted to further investigate these specific rheology and slip behavior. The simulation results conformed with experiments and established a linear relationship between the slip length and viscosity. We consider this study could be a conducive practical reference for the investigation of boundary slip in complex fluids and possibly a crucial protocol for analyzing STFs’ manipulation.

Original languageEnglish
Article number107261
JournalTribology International
Volume165
DOIs
StatePublished - Jan 2022

Keywords

  • Amphiphobic surface
  • Boundary slip
  • Drag reduction
  • Shear thickening fluid
  • Slip length

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