Non-Newtonian flow through packed beds and porous media

Kozicki, W.; Hsu, Chien; Tiu, Carlos

doi:10.1016/0009-2509(67)80032-0

Cited by 69 publications

(24 citation statements)

References 10 publications

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“…Flow experiments on disordered packed beds of monodisperse spheres have resulted in values for A in between 150 and 185. [25,26] Studies show that the Carman-Kozeny relation can be used for dense, disordered packed beds, irrespective of particle size and shape. [27,28] Although a variation of a factor of 2, our calculation of capillary number (Fig.…”

Section: Forces Determining the Drying Behaviormentioning

confidence: 99%

Transport of a water-soluble polymer during drying of a model porous media

et al. 2017

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This article presents an experimental investigation on transport of methylhydroxyethylcellulose (MHEC) during drying of a model porous material. Nuclear magnetic resonance imaging and thermogravimetric analysis are used to measure water and MHEC transport, respectively. MHEC is added to glue mortars to increase open time, i.e., the time period during which tiles can be applied with sufficiently good adhesion. Previous work showed that MHEC promotes a receding front during drying and therefore leads to differences in the degree of hydration throughout the mortar sample, i.e., the top surface shows poor hydration and the bottom surface shows good hydration. In this study, we investigate the transport of MHEC during drying of a model porous material, consisting of packed glass beads saturated with an aqueous MHEC solution. At MHEC concentration less than 1.3 wt%, homogeneous drying is observed, enabling advective transport of MHEC toward the drying surface. In this case, accumulation of MHEC may form a skin at the top surface and below this skin layer, a gel zone may form, which allows migration of water toward the evaporation surface. When the MHEC concentration is above 1.3 wt%, front receding drying is observed, which prevents transport of MHEC, resulting in a more homogeneous distribution of MHEC. ARTICLE HISTORY

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Section: Forces Determining the Drying Behaviormentioning

confidence: 99%

Transport of a water-soluble polymer during drying of a model porous media

et al. 2017

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“…Adsorption of polymer molecules on the capillary surface may lead to decreases in tube diameter [21,22] and errors in data interpretation. It was found that, using the gels, a difference of this kind in the range of 4-8% occurred when the capillary tubes were not pretreated to avoid or reduce polymer adsorption.…”

Section: Apparatus and Experimental Proceduresmentioning

confidence: 99%

The rheological characterization of HPG gels: Measurement of slip velocities in capillary tubes

Jiang¹,

Young

Metzner

1986

Rheol Acta

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“…Significant flow enhancements have been documented for the flow of polymer solutions in capillary tubes [1][2][3][4][5][6][7][8], in gravity-driven flows down inclined planes [9][10][11], and in porous media flow [12][13][14]. Flow inhomogeneous stress fields, while it is absent in uniform stress fields [6][7][8].…”

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confidence: 95%

An analysis of apparent slip flow of polymer solutions

Cohen

Metzner

1986

Rheol Acta

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Abstract:The apparent slip flow phenomenon of polymer solutions in capillary tubes is analyzed by a thermodynamic diffusion model. An approximate solution of the developing concentration profiles shows a significant decrease in the polymer wall concentration. The approximate concentration profiles are coupled with the concentration-dependent viscosity for aqueous polyacrylamide solutions to provide a priori predictions of the magnitude of the effective slip velocity at the wall. The results are in a reasonable agreement with the available apparent slip data for 1% and 0.5% solutions of partially hydrolyzed polyacrylamide.

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Non-Newtonian flow through packed beds and porous media

Cited by 69 publications

References 10 publications

Transport of a water-soluble polymer during drying of a model porous media

Transport of a water-soluble polymer during drying of a model porous media

The rheological characterization of HPG gels: Measurement of slip velocities in capillary tubes

An analysis of apparent slip flow of polymer solutions

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