Roberto Maglione

TL;DR: In this article, an optimal procedure is proposed whereby the best value of the yield stress is estimated using the Golden Section search methodology while the fluid consistency and fluid behavior indices are determined with linear regression on the transformed rheometric data.

TL;DR: In this paper, the authors presented experimental data for the flow of bentonite-water dispersions, modeled as Herschel-Bulkley fluids, for the pressure loss at different flow rates covering laminar, transitional and turbulent flow regimes, while flowing in concentric and fully eccentric annuli.

TL;DR: In this paper, the Robertson-Stiff model and the Casson model were used to determine whether they can describe the rheology of aqueous bentonite suspensions and the results showed that both models describe well the experimental data of these bentonite suspension with good statistical indicators.

TL;DR: In this article, yield stress of aqueous bentonite dispersions was determined at two concentrations, with two bentonites, over a range of pH values, with the vane technique and by extrapolation of the full rheograms, derived with concentric cylinder viscometer, fitted to Herschel-Bulkley and to Casson models.

TL;DR: An integrated approach for the flow of Herschel-Bulkley fluids in a concentric annulus, modelled as a slot, covering the full range of flow types, laminar, transitional, and turbulent flows, is presented in this paper.