Journal ArticleDOI
Solids deposition in low-velocity slug flow pneumatic conveying
Jintang Li,Colin Webb,Severino S. Pandiella,Grant M. Campbell,Tom Dyakowski,Andrew Cowell,Don McGlinchey +6 more
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In this paper, the amount of particle deposition in the horizontal pipeline after a conveying was calculated by controlling the solids feeding rate using a rotary valve and by monitoring the solid flow out of the system using dynamic load cells.Abstract:
Solids deposition in the horizontal pipeline of a pneumatic conveying system was studied both mathematically and experimentally. Mathematically modelled results using the coupled discrete element method (DEM) and computational fluid dynamics (CFD) approach have demonstrated an intensive exchange of particles between the stationary layer (deposited particles) and the moving slug and a variation of solids concentration and pressure and velocity distributions across the slug. Slug flows were also visualised experimentally through a glass section and analysed by a high-speed video camera. The amount of particle deposition in the pipeline after a conveying was calculated by controlling the solids feeding rate using a rotary valve and by monitoring the solids flow out of the system using dynamic load cells. Experimentally generated data have quantitatively shown a tendency of more solids deposition with lower gas mass flow rate in slug flows except that, below a certain amount of solids mass flow rate, the deposition becomes independent of gas flow rate.read more
Citations
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Discrete particle simulation of particulate systems: A review of major applications and findings
TL;DR: Zhu et al. as discussed by the authors provided a summary of the studies based on discrete particle simulation in the past two decades or so, with emphasis on the microdynamics including packing/flow structure and particle-particle, particle-fluid and particle wall interaction forces.
Journal ArticleDOI
Computational fluid dynamics (CFD) ¿ an effective and efficient design and analysis tool for the food industry: A review
Tomas Norton,Da-Wen Sun +1 more
TL;DR: In this paper, the authors discuss the fundamentals involved in developing a CFD solution and provide a state-of-the-art review on various CFD applications in the food industry such as ventilation, drying, sterilisation, refrigeration, cold display and storage, and mixing.
Journal ArticleDOI
Large-scale discrete element modeling in pneumatic conveying
Mikio Sakai,Seiichi Koshizuka +1 more
TL;DR: In this paper, a coarse grain model for large-scale DEM simulations is proposed, where a modeled particle whose size is larger than the original particle is used instead of a crowd of original particles.
Journal ArticleDOI
Process Modeling in the Pharmaceutical Industry using the Discrete Element Method
TL;DR: Current DEM models for several common pharmaceutical processes including material transport and storage, blending, granulation, milling, compression, and film coating are reviewed.
Journal ArticleDOI
CFD-DEM modelling and simulation of pneumatic conveying: A review
TL;DR: The emphasis is given to the modelling of key phenomena such as flow regimes and transition, pipe wear, particle attrition, and electrostatics in the gas-solid flow characteristics and process performance over a broad range of conditions.
References
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Journal ArticleDOI
Discrete particle simulation of two-dimensional fluidized bed
TL;DR: In this paper, Cundall's Distinct Element Method (P.A.Cundall and O.L. Strack, 1979) is used to model contact forces between particles.
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Predicting charge motion, power draw, segregation and wear in ball mills using discrete element methods
TL;DR: In this article, a model of a S m diameter ball mill is presented and the charge behaviour, torque and power draw are analyzed for a range of rotation rates from SO to 130% of the critical speed.
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Discrete element simulation of granular flow in 2D and 3D hoppers: Dependence of discharge rate and wall stress on particle interactions
TL;DR: In this paper, a continuous and gradual Hopper filling method was introduced, a more realistic normal-tangential interaction between the particles, particle size polydispersity, and the model was extended from two to three dimensions (3D).
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Applications of electrical tomography for gas-solids and liquid-solids flows : a review
TL;DR: A review of electrical tomography methods for investigating, monitoring and controlling gas and liquid solids systems is presented in this article, where the physical laws governing the electrical measurements and issues associated with image reconstruction are described in detail.
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Simulated and measured flow of granules in a bladed mixer—a detailed comparison
TL;DR: In this paper, Positron emission particle tracking (PEPT) was used to study the motion of glass beads in a vertical axis mixer with slowly rotating flat blades, and the results showed that different sets of assumptions predicted the detailed motion more accurately in different parts of the bed.