Couette flow behavior of coagulated colloidal suspensions. IV. Effect of viscosity of the suspension medium

Hunter, Robert J.; Frayne, J. G.

doi:10.1016/0021-9797(79)90218-2

Cited by 30 publications

(5 citation statements)

References 12 publications

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“…19-21. [23][24][25]. Significant swelling is observed in toluene; therefore, either endothermal-exothermal signals separated in time are registered within the same measurement or the wetting results in only an endothermal heat effect [37,38,62,78,79].…”

Section: Heat Of Wetting On Swelling Clay Mineralsmentioning

confidence: 99%

“…32a. Based on the Bingham equation τ ϭ τ B ϩ η pl D, the plastic viscosity η pl and the Bingham yield value τ B can be calculated from the flow curves [20][21][22][23][24][25][26][27]29,36,39,64]. The Aerosil suspensions yield a series of flow curves over the entire mixture composition range, the most characteristic of which are shown in Fig.…”

Section: A Influence Of the Adsorption Layer On The Aggregation Of Amentioning

confidence: 99%

“…One of the simplest methods to achieve this is through the determination of the rheological characteristics of the system, because this property is highly dependent on interparticle adhesion [20][21][22][23][24][25][26][27]. One of the simplest methods to achieve this is through the determination of the rheological characteristics of the system, because this property is highly dependent on interparticle adhesion [20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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Microcalorimetric Control of Liquid Sorption on Hydrophilic/Hydrophobic Surfaces in Nonaqueous Dispersions

Garti¹

2000

Surfactant Science

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Section: Heat Of Wetting On Swelling Clay Mineralsmentioning

confidence: 99%

Section: A Influence Of the Adsorption Layer On The Aggregation Of Amentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microcalorimetric Control of Liquid Sorption on Hydrophilic/Hydrophobic Surfaces in Nonaqueous Dispersions

Garti¹

2000

Surfactant Science

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“…[1][2][3][4][5][6]) have developed the "elastic floc" model for analysing the energy dissipation during steady flow in dilute suspensions, where separate flocs can be discerned. The starting point of this model is that the energy dissipation related to the flow is caused predominantly by the viscous drag experienced by particles moving within flocs, and by the internal movement of liquid within the flocs when they change their volume or shape.…”

Section: Introductionmentioning

confidence: 99%

Rheology of concentrated coagulating suspensions in non-aqueous media

Schreuder¹,

Stein

1987

Rheol Acta

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The rheology of concentrated coagulating suspensions is analysed on the basis of the following model: (i) at low shear rates, the shear is not distributed homogeneously but limited to certain shear planes; (ii) the energy dissipation during steady flow is due primarily to the overcoming of viscous drag by the suspended particles during motion caused by encounters of particles in the shear planes. This model is called the "giant floc" model.With increasing shear rate the distance between successive shear planes diminishes, approaching the suspended particles' diameter at average shear stresses of 88-117 Pa in suspensions of 78 lam particles (glass ballotini coated by a hydrophobic layer) in glycerol -water mixtures, at solid volume fractions between 0.35 and 0.40. Smaller particles form a more persistent coagulation structure. The average force necessary to separate two touching 78 gm particles is too large to be accounted for by London-van der Waels forces; thus coagulation is attributed to bridging connections between polymer chains protruding from the hydrophobic coatings.The frictional ratio of the glass particles in these suspensions is of the order of 10. Coagulation leads to build-up of larger structural units at lower shear rates; on doubling the shear rate the average distance between the shear planes decreases by a factor of 0.81 to 0.88.

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“…The aim of the present work was to investigate, whether the "elastic floc" model developed by Hunter et al [1][2][3] and van de Ven and Hunter [4] can account for the rheology of concentrated coagulated suspensions.…”

Section: Introductionmentioning

confidence: 99%

The rheological behaviour of Ca(OH)2 suspensions

Diemen

Stein

1983

Rheol Acta

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Abstract:The theological behaviour of Ca(OH)2 suspensions is investigated, predominantly at a solid volume fraction of 0.25. The influence of standing without being subject to shear ("contact time") is distinguished from that of being sheared ("shearing time"). The results are interpreted on the basis of the "elastic floc" model of energy dissipation during flow, with a view to the problem whether, in addition to an energy dissipation term related to the viscous drag experienced by particles moving within flocs, there should be an independent energy dissipation term related to fluid movement in the flocs when they change volume or shape. It appears that this additional energy dissipation term is not necessary, if the increase in viscous friction, experienced by two particles which are close together, is taken into account.

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Couette flow behavior of coagulated colloidal suspensions. IV. Effect of viscosity of the suspension medium

Cited by 30 publications

References 12 publications

Microcalorimetric Control of Liquid Sorption on Hydrophilic/Hydrophobic Surfaces in Nonaqueous Dispersions

Microcalorimetric Control of Liquid Sorption on Hydrophilic/Hydrophobic Surfaces in Nonaqueous Dispersions

Rheology of concentrated coagulating suspensions in non-aqueous media

The rheological behaviour of Ca(OH)2 suspensions

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