The effect of sphere roughness on the rheology of concentrated suspensions

Ji Young Moon; Shaocong Dai; Li Chang; Joon Sang Lee; Roger I. Tanner

doi:10.1016/j.jnnfm.2015.07.007

The effect of sphere roughness on the rheology of concentrated suspensions

Ji Young Moon, Shaocong Dai, Li Chang, Joon Sang Lee, Roger I. Tanner

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

We present the results of measuring the viscometric flow of concentrated rigid-sphere suspensions with constant-viscosity matrices, both Newtonian (silicone oil) and non-Newtonian (Boger fluid: corn syrup (79.4%)-glycerin (19.8%)-4%PAA water (0.78%)). Various problems with the measurements are discussed, including settling due to density differences. The effect of sphere roughness on shear rheology is a main concern of the work. The viscosities of silicone oil and Boger fluid suspensions were increased by increasing sphere roughness, and the normal stress difference N₁-N₂ in the Boger fluid suspension also increased with roughness.

Original language	English
Pages (from-to)	233-239
Number of pages	7
Journal	Journal of Non-Newtonian Fluid Mechanics
Volume	223
DOIs	https://doi.org/10.1016/j.jnnfm.2015.07.007
Publication status	Published - 2015 Sept 1

Bibliographical note

Publisher Copyright:
© 2015 Elsevier B.V..

All Science Journal Classification (ASJC) codes

Chemical Engineering(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering
Applied Mathematics

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title = "The effect of sphere roughness on the rheology of concentrated suspensions",

abstract = "We present the results of measuring the viscometric flow of concentrated rigid-sphere suspensions with constant-viscosity matrices, both Newtonian (silicone oil) and non-Newtonian (Boger fluid: corn syrup (79.4%)-glycerin (19.8%)-4%PAA water (0.78%)). Various problems with the measurements are discussed, including settling due to density differences. The effect of sphere roughness on shear rheology is a main concern of the work. The viscosities of silicone oil and Boger fluid suspensions were increased by increasing sphere roughness, and the normal stress difference N1-N2 in the Boger fluid suspension also increased with roughness.",

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AU - Moon, Ji Young

AU - Dai, Shaocong

AU - Chang, Li

AU - Lee, Joon Sang

AU - Tanner, Roger I.

PY - 2015/9/1

Y1 - 2015/9/1

N2 - We present the results of measuring the viscometric flow of concentrated rigid-sphere suspensions with constant-viscosity matrices, both Newtonian (silicone oil) and non-Newtonian (Boger fluid: corn syrup (79.4%)-glycerin (19.8%)-4%PAA water (0.78%)). Various problems with the measurements are discussed, including settling due to density differences. The effect of sphere roughness on shear rheology is a main concern of the work. The viscosities of silicone oil and Boger fluid suspensions were increased by increasing sphere roughness, and the normal stress difference N1-N2 in the Boger fluid suspension also increased with roughness.

AB - We present the results of measuring the viscometric flow of concentrated rigid-sphere suspensions with constant-viscosity matrices, both Newtonian (silicone oil) and non-Newtonian (Boger fluid: corn syrup (79.4%)-glycerin (19.8%)-4%PAA water (0.78%)). Various problems with the measurements are discussed, including settling due to density differences. The effect of sphere roughness on shear rheology is a main concern of the work. The viscosities of silicone oil and Boger fluid suspensions were increased by increasing sphere roughness, and the normal stress difference N1-N2 in the Boger fluid suspension also increased with roughness.

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The effect of sphere roughness on the rheology of concentrated suspensions

Abstract

Bibliographical note

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