Agglomeration and Viscosity in Dilute Suspensions

Broughton, G.; Windebank, C. S.

doi:10.1021/ie50340a009

Cited by 19 publications

(5 citation statements)

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“…The theoretical expressions obtained for effective viscosity of emulsions compare favorably with experimental data of Neogy and Ghosh (18), Sibree (15), Sherman (17), and Broughton and Windebank (16). Specific relations were then derived for uniform, Couette and hyperbolic fields.…”

Section: Discussionsupporting

confidence: 62%

“…Using the approximate relation [11] whereby Oa Vs a (F) _~ (~fi-) o Vs F ", [12] we transform, following Brenner (8), boundary conditions [5] to [10] as follows : At r : a: v c" tr = 0, [13] v d" t r = 0, [14] r~=r ar ' [15] r" Vxv d = r" Vxv c, [16] r" Vx(rxzdr) : r" Vx(rxvCr)-(~)0[r" Vx(rxVs_r")], [17] Rheologica Acta, JBand 11, Heft 3/4 (1972) …”

Section: Expected Velocity and Pressure Fieldsmentioning

confidence: 99%

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On viscous flow and effective viscosity of concentrated suspensions and emulsions

Yaron

Gal‐Or

1972

Rheol Acta

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Section: Discussionsupporting

confidence: 62%

Section: Expected Velocity and Pressure Fieldsmentioning

confidence: 99%

On viscous flow and effective viscosity of concentrated suspensions and emulsions

Yaron

Gal‐Or

1972

Rheol Acta

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“…Experimentally a linear % -c relation has been reported several times for agglomerating suspensions, up to rather high concentrations of 0.20-0.40 (90,91,92,93), although the conditions of measurement were somewhat uncertain.…”

Section: Einsteinian Formulamentioning

confidence: 99%

Relative viscosity and concentration

Rutgers¹

1962

Rheol Acta

265

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“…Flocculation or agglomeration almost invariably lead to increase in yield value;2 thus even glass spheres when agglomerated show yield values at low concentrations. 6 Alcohol and pyridine both flocculate bentonite * The yield value of electrodialyzed bentonite increased continuously on standing, perhaps because of migration of ions from the interior. The curve in Fig.…”

Section: Effect Of Agglomerationmentioning

confidence: 99%

Viscosity Characteristics of Clays in Connection with Drilling Muds

Broughton

Hand

1938

Petroleum Technology

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FOR the past few years a great amount of work has been done on the viscosity characteristics and gelation of clay suspensions, much of which has been reported in papers published by the Institute.7,12, 18,19,24 Important reviews have been made elsewhere by Evans and Reid,l° Marshall 20 and Clews, Macey and Rigby, 8 the last two on the general properties of clay. It is unnecessary, therefore, to recapitulate past work beyond recalling that three explanations for the high viscosity and gelation of clay suspensions have been put forward. For lack of more exact nomenclature, these may be called the water hull,l6 mechanical interference 19 and attraction-repulsion 13 theories. The first pictures the clay particles as surrounded by relatively rigid water envelopes, which increase effective volume i the second emphasizes the mechanical interference of platy particles or their agglomerates i while in the third the particles are assumed to be held relatively rigidly at a distance from each other determined by the balance between the attractive (van der Waal's) forces and the electrical repulsions of the charges. 13, 14 This article presents fresh data on clay suspensions, particularly on the influence of previous flow history of the suspensions, specific contra-ions, temperature, solvation and particle size, in an attempt to contribute to the solution of the problem. EXPERIMENTAL PROCEDUREPreparation of Samples.-Suspensions of the raw clays were prepared by adding the clay to water with vigorous stirring and allowing the mixture to stand for several hours. In bentonite suspensions, the sand that settled was removed. Many of the suspensions were put through a homogenizer for deflocculation before use. The suspensions containing alcohol and pyridine were prepared by gradually adding a known quantity of the C.P. reagent to the clay, shaking after each addition. They were then allowed to stand for two days before measurements were taken. All concentrations are expressed on a weight per cent basis.

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Agglomeration and Viscosity in Dilute Suspensions

Cited by 19 publications

References 0 publications

On viscous flow and effective viscosity of concentrated suspensions and emulsions

On viscous flow and effective viscosity of concentrated suspensions and emulsions

Relative viscosity and concentration

Viscosity Characteristics of Clays in Connection with Drilling Muds

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