Abstract: Processing of the available experimental data on the particles settling in shear-thinning polymer solutions is performed. Conclusions imply that sedimentation should be recursive since settling also occurs within the sediment. To capture such an effect, a mathematical model of two continua has been developed, which corresponds to experimental data. The model is consistent with basic thermodynamics laws. The rheological component of this model is a correlation formula for gravitational mobility. This closure is justified by comparison with known experimental data available for the particles settling in vertical vessels. In addition, the closure is validated by comparison with analytical solutions to the Kynch one-dimensional equation which governs dynamics of particles concentration. An explanation is given for the Boycott effect and it is proved that sedimentation is enhanced in a 2D inclined vessel. In tilted vessels, the flow is essentially two-dimensional and the one-dimensional Kynch theory is not applicable; vortices play an important role in sedimentation.

Cite: Neverov V. , Shelukhin V.
Recursive Settling of Particles in Shear Thinning Polymer Solutions: Two Velocity Mathematical Model
Polymers. 2022. V.14. 4241 :1-17. DOI: 10.3390/polym14194241 WOS Scopus РИНЦ OpenAlex

Dates:

Submitted:	Aug 29, 2022
Accepted:	Sep 26, 2022
Published online:	Oct 10, 2022

Identifiers:

Web of science:	WOS:000867064400001
Scopus:	2-s2.0-85139950428
Elibrary:	56777917
OpenAlex:	W4304166095

Citing:

DB	Citing
Scopus	1
OpenAlex	1
Web of science	1

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