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- W3049732012 endingPage "1120" @default.
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- W3049732012 abstract "In a concentrated suspension, particles come into contact due to the presence of asperities on their surfaces. As a result, the contact forces and interparticle friction become one of the important factors governing the rheology of rigid particle suspensions at high concentrations. We show that a load-dependent friction model can be used to reproduce the experimentally observed shear thickening [ST—continuous and discontinuous (DST)] behavior with an increase in the asperity size. Increasing the particle surface roughness size leads to a decrease in the critical shear rate above which shear-thickening takes place, a reduction in the critical volume fraction for DST and an increase in the viscosity jump across non-shear-thickened to shear-thickened regime. In this paper, we propose a constitutive model to quantify the effect of increasing the roughness size on the rheology of dense ST suspensions as well as on the critical shear rate for ST and the critical volume fraction for DST. We fit this model to our simulation data for stress controlled shear flow of dense rough particle suspensions. Once the fitting is complete, these equations are used to predict exact volume fractions and shear stress values for transitions between three regimes on the shear stress-shear rate flow state diagram for different roughness values. The results of this study can be used to tune the particle surface roughness for manipulating the dense suspension rheology according to different applications." @default.
- W3049732012 created "2020-08-21" @default.
- W3049732012 creator A5021681495 @default.
- W3049732012 creator A5048295740 @default.
- W3049732012 date "2020-08-14" @default.
- W3049732012 modified "2023-10-17" @default.
- W3049732012 title "A constitutive model for sheared dense suspensions of rough particles" @default.
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- W3049732012 doi "https://doi.org/10.1122/8.0000039" @default.
- W3049732012 hasPublicationYear "2020" @default.
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