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Étude et modélisation de l'influence des propriétés physico-chimiques de suspensions concentrées sur leur comportement rhéologique

Abstract : Concentrated suspensions are fluids which display complex rheological properties. These properties are modelled through structural equations which consider both the liquid and solid phases, but with a lack of consistency for the granular parameters (in particular the maximum packing fraction of non-model suspensions). The overall objective of this paper is to investigate the dependence of the viscosity of energetic concentrated suspensions on the physicochemical properties of their components. The properties with the most significant impact on the viscosity are chosen using the Design of Experiments methodology. The resulting model accounts for the mass median diameter D50 in small and large particles, the large particles density d, the specific surface area of small particles, the shear stress γ ̇ applied to the suspension, the viscosity of the suspending fluid η_f and a constant value for the volume fraction in solid ϕ≃0.51. Moreover, this model allows predicting the viscosity of the studied suspensions for a volume fraction in solid from 0 to 0.51 %
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Submitted on : Wednesday, July 11, 2018 - 11:50:11 AM
Last modification on : Thursday, July 12, 2018 - 1:33:30 AM
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  • HAL Id : tel-01835259, version 1

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Fabien Sta. Étude et modélisation de l'influence des propriétés physico-chimiques de suspensions concentrées sur leur comportement rhéologique. Génie des procédés. Université de Lorraine, 2018. Français. ⟨NNT : 2018LORR0012⟩. ⟨tel-01835259⟩

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