Plug conveying in a horizontal tube

Strauss, M.; McNamara, Sean; Herrmann, Hans J.

doi:10.1007/s10035-006-0020-4

Cited by 12 publications

(12 citation statements)

References 41 publications

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“…In recent years, some efforts have been made in this direction. For example, Strauß et al 52,53 developed a 3-D CFD-DEM for horizontal and vertical slug flow, where gas flow was described by the Darcy law to avoid CFD effort. Chu and Yu 54 integrated a 3-D DEM model into the commercial CFD package Fluent for the study of gas-solid flow through a bend.…”

Section: Introductionmentioning

confidence: 99%

Micromechanic modeling and analysis of the flow regimes in horizontal pneumatic conveying

Kuang

2011

AIChE Journal

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Pneumatic conveying is an important technology for industries to transport bulk materials from one location to another. Different flow regimes have been observed in such transportation processes, but the underlying fundamentals are not clear. This article presents a three-dimensional (3-D) numerical study of horizontal pneumatic conveying by a combined approach of discrete element model for particles and computational fluid dynamics for gas. This particle scale, micromechanic approach is verified by comparing the calculated and measured results in terms of particle flow pattern and gas pressure drop. It is shown that flow regimes usually encountered in horizontal pneumatic conveying, including slug flow, stratified flow, dispersed flow and transition flow between slug flow and stratified flow, and the corresponding phase diagram can be reproduced. The forces governing the behavior of particles, such as the particleparticle, particle-fluid and particle-wall forces, are then analyzed in detail. It is shown that the roles of these forces vary with flow regimes. A general phase diagram in terms of these forces is proposed to describe the flow regimes in horizontal pneumatic conveying.

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Section: Introductionmentioning

confidence: 99%

Micromechanic modeling and analysis of the flow regimes in horizontal pneumatic conveying

Kuang

2011

AIChE Journal

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“…The slurry is significantly heavier than the clear liquid and slides along the inclined tube until it reaches the bottom 23. Some features of the Boycott effect for gas–particle flows, which are associated with density waves in granular materials were examined experimentally by Raafat et al,24 who observed a nearly stationary structure of density waves, and numerically by Strauss et al25…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of three‐dimensional gas‐solid particle flow in a horizontal pipe

et al. 2011

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A three-dimensional model of particulate flows using the Reynolds Averaged NavierStokes method is presented. The governing equations of the gas-solids flow are supplemented with appropriate closure equations to take into account all the relevant forces exerted on the solid particles, such as particle-turbulence interactions, turbulence modulation, particle-particle interactions, particle-wall interactions, as well as gravitational, viscous drag, and lift forces. A finite volume numerical technique was implemented for the numerical solution of the problem. The method has been validated by comparing its results with the limited number of available experimental data for the velocity and turbulence intensity of the gas-particle flow. The results show that the presence of particles in the flow has a significant effect on all the flow variables. Most notably, the distribution of all the parameters becomes asymmetric, because of the gravitational effect on the particles and particle sedimentation.

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“…Much larger systems can be treated this way, but the coarse-graining is justified only in certain situations. An example is the pneumatic transport of a powder in a pipe which is a common process in many industrial applications [12,[47][48][49].…”

Section: Introductionmentioning

confidence: 99%

Recent advances in the simulation of particle-laden flows

Harting

Frijters

Ramaioli

et al. 2014

Eur. Phys. J. Spec. Top.

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Abstract. A substantial number of algorithms exists for the simulation of moving particles suspended in fluids. However, finding the best method to address a particular physical problem is often highly nontrivial and depends on the properties of the particles and the involved fluid(s) together. In this report we provide a short overview on a number of existing simulation methods and provide two state of the art examples in more detail. In both cases, the particles are described using a Discrete Element Method (DEM). The DEM solver is usually coupled to a fluid-solver, which can be classified as grid-based or mesh-free (one example for each is given). Fluid solvers feature different resolutions relative to the particle size and separation. First, a multicomponent lattice Boltzmann algorithm (mesh-based and with rather fine resolution) is presented to study the behavior of particle stabilized fluid interfaces and second, a Smoothed Particle Hydrodynamics implementation (mesh-free, meso-scale resolution, similar to the particle size) is introduced to highlight a new player in the field, which is expected to be particularly suited for flows including free surfaces.

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Plug conveying in a horizontal tube

Cited by 12 publications

References 41 publications

Micromechanic modeling and analysis of the flow regimes in horizontal pneumatic conveying

Micromechanic modeling and analysis of the flow regimes in horizontal pneumatic conveying

Numerical simulation of three‐dimensional gas‐solid particle flow in a horizontal pipe

Recent advances in the simulation of particle-laden flows

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