An apparent viscosity function for shear thickening fluids Articles uri icon

publication date

  • March 2011

start page

  • 321

end page

  • 325

issue

  • 5-6

volume

  • 166

international standard serial number (ISSN)

  • 0377-0257

electronic international standard serial number (EISSN)

  • 1873-2631

abstract

  • A new apparent viscosity function for shear thickening fluids is proposed, contemplating the three characteristic regions typically exhibited by these materials: slight shear thinning at low shear rates, followed by a sharp viscosity increase over a threshold shear rate value (critical shear rate), and a subsequent pronounced shear thinning region at high shear rates. The proposed function has a continuous derivative, making it appropriate in numerical simulations. Moreover, the function is shown to provide an excellent fit to several independent experimental data sets.

keywords

  • generalized newtonian fluid ; viscosity function ; shear thickening fluids ; rheology ; fumed silica suspension