Inception of shear flow for ferromagnetic dispersions

Piao, Meihua; Nikles, D. E.; Lane, Alan M.; Wiest, John M.

doi:10.1122/1.1803575

Cited by 1 publication

(1 citation statement)

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“…The dynamics of these processes in real disperse systems does not depend only on the volume content of a solid phase and the nature of a dispersion medium as the main factors that determine the intensity of coagulation induced struc turing processes. An important role is played by the dispersity and anisometry of dispersed phase particles [8,10,12,[26][27][28]. An increase in the dispersity and anisometry of particles is accompanied by an enhancement of the interparticle interaction and, accordingly, a reduction in the critical solid phase con centration corresponding to the formation of a contin uous spatial structure and a drastic increase in its strength.…”

Section: Introductionmentioning

confidence: 99%

Concentration factor and rheology of aqueous titanium dioxide dispersions

Zakordonskiy

Soltys

2014

Colloid J

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The rheological properties of aqueous titanium dioxide dispersions have been studied by rota tional viscometry. It has been established that the studied disperse systems are highly structured, and their degree of structuring dramatically increases with the volume fraction ϕ of the solid phase. At solid phase con tents ϕ ≥ 0.164, the breakage of the disperse structure is accompanied by the appearance of local discontinu ities and an abnormal dependence of viscosity on shear stress. The results obtained have been analyzed in terms of the Uriev theory of aggregated systems. The radii of aggregates and maximum solid phase content ϕ m that corresponds to the formation of a continuous disperse structure under the conditions of dynamic impact have been calculated.

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