Journal ArticleDOI
The voidage function for fluid-particle interaction systems
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In this article, it was shown that for a wide varicty of both fixed-bed and suspended-particle systems, file voidage function may be expressed as ϵ−β, where the exponent β is dependent on the particle Reynolds number but independent of other system variables.About:
This article is published in International Journal of Multiphase Flow.The article was published on 1994-02-01. It has received 1090 citations till now. The article focuses on the topics: Drag & Volumetric flux.read more
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The physics of debris flows
TL;DR: In this paper, a simple model that satisfies most of these criteria uses depth-averaged equations of motion patterned after those of the Savage-Hutter theory for gravity-driven flow of dry granular masses but generalized to include the effects of viscous pore fluid with varying pressure.
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Discrete particle simulation of particulate systems: Theoretical developments
TL;DR: This paper reviews the work in this area with special reference to the discrete element method and associated theoretical developments, and covers three important aspects: models for the calculation of the particle–particle and particle–fluid interaction forces, coupling of discrete elements method with computational fluid dynamics to describe particle-fluid flow, and the theories for linking discrete to continuum modelling.
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Numerical simulation of the gas-solid flow in a fluidized bed by combining discrete particle method with computational fluid dynamics
TL;DR: In this article, a combined approach of discrete particle method and computational fluid dynamics (DPM-CFD), in which the motion of individual particles is obtained by solving Newton's second law of motion and gas flow by the Navier-Stokes equation based on the concept of local average, is presented.
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Drag force of intermediate Reynolds number flow past mono- and bidisperse arrays of spheres
TL;DR: In this article, extensive lattice Boltzmann simulations were performed to obtain the drag force for random arrays of monodisperse and bidisperse spheres, and a new drag law was suggested for general polydisperse systems.
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Discrete particle simulation of particle–fluid flow: model formulations and their applicability
TL;DR: In this paper, the origin and applicability of different CFD-DEM models are discussed and compared theoretically and then verified from the study of three representative particle-fluid flow systems: fluidization, pneumatic conveying and hydrocyclones.
References
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Journal ArticleDOI
Sedimentation in a dilute dispersion of spheres
TL;DR: In this article, the authors considered a large number of identical small rigid spheres with random positions which are falling through Newtonian fluid under gravity and determined the mean value of the velocity of a sphere (U).
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Viscous flow in multiparticle systems: Slow motion of fluids relative to beds of spherical particles
TL;DR: In this paper, a mathematical treatment is developed on the basis that two concentric spheres can serve as the model for a random assemblage of spheres moving relative to a fluid, and the appropriate boundary conditions resulting from these assumptions enable a closed solution to be obtained satisfying the Stokes-Navier equations omitting inertia terms.