A critical assessment of the Jastrzebski interface condition for the capillary flow of pastes, foams and polymers

Martin, Peter; Wilson, D.I.

doi:10.1016/j.ces.2004.08.011

Cited by 38 publications

(12 citation statements)

References 39 publications

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“…Quantification of slip in conventional rheology is an involved process. The Mooney 77 approach has been the preferred route for many years but there are numerous cases in the literature of the approach failing to yield meaningful solutions, as analysed by Martin and Wilson 78 . Hatzikiriakos and Dealy 79 developed a simpler approach and there is some evidence of its applicability to ceramic pastes.…”

Section: Paste Flowmentioning

confidence: 99%

Shaping ceramics by plastic processing

Blackburn¹,

Wilson²

2008

Journal of the European Ceramic Society

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Section: Paste Flowmentioning

confidence: 99%

Shaping ceramics by plastic processing

Blackburn¹,

Wilson²

2008

Journal of the European Ceramic Society

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“…Besides Mooney method, Oldroyd 18 or Jastrzebski method 19 was proposed for a concentrated suspension, but these methods were criticized as empirical expressions for their lacking of a coherent physical justification. 20 Hitherto, there are few studies on the combined effects of particle migration, wall slip, non-Newtonian viscosity, and end effects on viscosity measurements in capillary rheometry. This study presents a systematic investigation on these effects for obtaining the true viscosity of a concentrated suspension.…”

Section: Introductionmentioning

confidence: 99%

Viscosity corrections for concentrated suspension in capillary flow with wall slip

et al. 2009

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in Wiley InterScience (www.interscience.wiley.com).Corrections for viscosity measurements of concentrated suspension with capillary rheometer experiments were investigated. These corrections include end effects, Rabinowitsch effect, and wall slip. The effects of temperature, particle concentration, and contraction ratio on the end effects were studied and their effects were accounted for using an entrance and exit losses model. The non-Newtonian effect and the nonlinearity of slip velocity against wall shear stress were described using a slip model. The true viscosity of a concentrated suspension with glass powder suspended in a nonNewtonian binder system was calculated as a function of shear rate and effective particle concentration, taking into consideration particle migration, which is calculated by a diffusive numerical model. Particle size was found to affect significantly the viscosity of the suspension with viscosity decreasing with increasing particle size, which can be reflected by a decrease in the value of the power-law index in the Krieger model.

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“…Tikhonov regularization method developed by Yeow et al has been widely used to analyze the experimental data to calculate the slip characteristics of a fluid relating to phase separation, i.e. particle immigration and sedimentation, and changes in local solid concentration . This method is modified from classical Mooney method, and the results of slip characterization do not depend on the assumed rheological constitutive equation and data extrapolation.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of wall slip effects on the flow characteristics of petroleum coke–water slurry flow along pipelines

Zhang

Liu

Bikane

et al. 2017

Asia-Pacific J Chem Eng

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Flow characteristics of petroleum coke-water slurry (PCWS) were investigated in a slurry transportation facility. True rheological properties, drag reduction, and flow resistances of PCWS under the influence of wall slip were studied using the Tikhonov regularization method. Results show that the shear viscosity is insensitive to changes in the shear rate when the solid loading of PCWS is 59.8 wt%. However, the PCWS of 61.1 wt% exhibits typical dilatant fluid properties. As the shear rate increases, the PCWS of 63.4 wt% initially exhibits shear thinning, and then, the viscosity increases sharply when the shear rate exceeds 250 s À1 . In addition, the slurry also displays shear thinning at the shear rates exceeding 600 s À1 . Modified friction factor-generalized Reynolds number correlation is established to describe the resistance properties of a laminar flow of PCWS. When increasing the velocity, the drag reduction produced by the wall slip behavior reduces for the 59.8 wt% PCWS but increases for the 61.1 wt% PCWS. The drag reduction decreases at the outset followed by an increase for the 63.4 wt% PCWS. A decrease in the inner diameter of pipeline could enhance the effect of drag reduction of PCWS flowing in a pipeline.

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A critical assessment of the Jastrzebski interface condition for the capillary flow of pastes, foams and polymers

Cited by 38 publications

References 39 publications

Shaping ceramics by plastic processing

Shaping ceramics by plastic processing

Viscosity corrections for concentrated suspension in capillary flow with wall slip

Evaluation of wall slip effects on the flow characteristics of petroleum coke–water slurry flow along pipelines

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