Negative pressure in shear thickening band of a dilatant fluid

Shin Ichiro Nagahiro, Hiizu Nakanishi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We perform experiments and numerical simulations to investigate spatial distribution of pressure in a sheared dilatant fluid of the Taylor-Couette flow under a constant external shear stress. In a certain range of shear stress, the flow undergoes the shear thickening oscillation around 20 Hz. We find that, during the oscillation, a localized thickened band rotates around the axis with the flow. Based upon experiments and numerical simulations, we show that a major part of the thickened band is under negative pressure even in the case of discontinuous shear thickening, which indicates that the thickening is caused by Reynolds dilatancy; the dilatancy causes the negative pressure in interstitial fluid, which generates contact structure in the granular medium, then frictional resistance hinders rearrangement of the structure and solidifies the medium.

Original languageEnglish
Article number062614
JournalPhysical Review E
Volume94
Issue number6
DOIs
Publication statusPublished - Dec 29 2016

Fingerprint

Shear Bands
shear
Shear Stress
Fluid
shear stress
fluids
Oscillation
Taylor-Couette Flow
Numerical Simulation
Granular Media
oscillations
Contact Structure
Couette flow
Rearrangement
Spatial Distribution
Experiment
electric contacts
spatial distribution
interstitials
simulation

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

Cite this

Negative pressure in shear thickening band of a dilatant fluid. / Nagahiro, Shin Ichiro; Nakanishi, Hiizu.

In: Physical Review E, Vol. 94, No. 6, 062614, 29.12.2016.

Research output: Contribution to journalArticle

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