✦ LIBER ✦

Yield stress of suspensions loaded with size distributed particles

✍ Scribed by Prakash C. Kapur; Peter J. Scales; David V. Boger; Thomas W. Healy

Publisher: American Institute of Chemical Engineers
Year: 1997
Tongue: English
Weight: 775 KB
Volume: 43
Category: Article
ISSN: 0001-1541
DOI: 10.1002/aic.690430506

No coin nor oath required. For personal study only.

✦ Synopsis

A new theoretical approach is proposed for the yield stress of concentrated, flocculated particulate suspensions. Explicit cognizance is taken for the three-dimensional, mechanical& rigid particle network held together by interparticle forces wherein the mean coordination number in the assemblage increases and the separation between the particles decreases with an increase in the volume fraction of the solid phase. The Rump-Molerus model relating isotropic normal stress and isotropic normal interparticle force in a bed of single-sized spheres is modified to incorporate the size distribution of particles and extended to the suspension network. The model estimates the yield stress as a function of solids loading for various kinds of size distribution and is in reasonable agreement with experimental data when the suface properties of the particle are held constant.

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