Journal ArticleDOI
A kinetic model for rapid granular flows of nearly elastic particles including interstitial fluid effects
D. Ma,Goodarz Ahmadi +1 more
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In this paper, the first-order particulate distribution function is determined and constitutive equations for the kinetic parts of the particulate stress tensor and fluctuation energy flux vector are formulated.About:
This article is published in Powder Technology.The article was published on 1988-11-01. It has received 62 citations till now. The article focuses on the topics: Constitutive equation & Drag.read more
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ReportDOI
MFIX documentation theory guide
TL;DR: This report describes the MFIX (Multiphase Flow with Interphase exchanges) computer model, a general-purpose hydrodynamic model that describes chemical reactions and heat transfer in dense or dilute fluid-solids flows, flows typically occurring in energy conversion and chemical processing reactors.
Journal ArticleDOI
The role of meso-scale structures in rapid gas–solid flows
TL;DR: In this paper, it is shown that the meso-scale structures are too small, and hence too expensive, to be resolved completely in simulation of gas-particle flows in large process vessels.
Journal ArticleDOI
Analysis of a frictional-kinetic model for gas-particle flow
TL;DR: In this article, a frictional-kinetic rheological model for dense assemblies of solids in a gas-particle mixture is described, which treats the kinetic and frictional stresses additively.
Journal ArticleDOI
Particle pressure and marginal stability limits for a homogeneous monodisperse gas-fluidized bed: kinetic theory and numerical simulations
Donald L. Koch,Ashok S. Sangani +1 more
TL;DR: In this paper, a linear stability analysis is performed for the homogeneous state of a monodisperse gas-fluidized bed of spherical particles undergoing hydrodynamic interactions and solid-body collisions at small particle Reynolds number and finite Stokes number.
Journal ArticleDOI
On flows of granular materials
TL;DR: In this article, the behavior of materials made up of a large assemblage of solid particles under rapid and quasi-static deformations is reviewed and a phenomenological approach that describes rapid flows of granular materials under simultaneous transport of heat is presented.
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Journal ArticleDOI
Equation of State for Nonattracting Rigid Spheres
TL;DR: In this paper, a new equation of state for rigid spheres has been developed from an analysis of the reduced virial series, which possesses superior ability to describe rigid-sphere behavior compared with existing equations.
Journal ArticleDOI
Kinetic theories for granular flow: inelastic particles in Couette flow and slightly inelastic particles in a general flowfield
TL;DR: In this paper, the authors studied the flow of an idealized granular material consisting of uniform smooth, but nelastic, spherical particles using statistical methods analogous to those used in the kinetic theory of gases.
Journal ArticleDOI
Drag coefficient and relative velocity in bubbly, droplet or particulate flows
Mamoru Ishii,Novak Zuber +1 more
TL;DR: In this article, the relative motion correlations for dispersed two-phase flows of bubbles, drops, and particles were developed from simple similarity criteria and a mixture viscosity model, and satisfactory agreements were obtained at wide ranges of the particle concentration and Reynolds number.