Numerical and experimental study of horizontal pneumatic transportation of spherical and low-aspect-ratio cylindrical particles

Abstract

(2016) Numerical and experimental study of horizontal pneumatic transportation of spherical and low-aspect-ratio cylindrical particles. Powder Technology, Published by: Elsevier URL:http://dx

A Comparative Study of Mixed Resolved–Unresolved CFD-DEM and Unresolved CFD-DEM Methods for the Solution of Particle-Laden Liquid Flows

“…x ij = (X j − X i ) • n i j is the relative distance between two particle andv i j = (v jvi )•n i j the relative predicted velocity projected along n ij . Decomposing contact forces by their amplitude f ik and direction n ik and introducing previous notations, equation (12) becomes:…”

“…The interested reader is referred to [27] regarding grid size to DEM particle diameter ratio and validation of numerical model pertaining to particel bounce in a rectangular model compared with experimental data. In fact, there is no concrete consensus among the research arena regarding the modeling of solid-air drag closures [12,48,18].…”

CFD simulation methodology for gas-solid flow in bypass pneumatic conveying – A review

“…Tsuji et al [69][70] firstly proposed this model and then many researchers have adopted this model in the studies of pneumatic conveying with millimetre-scale particle diameter, as shown in Table 3. Ebrahimi et al [72] Spherical glass Oschmann et al [73] Non-spherical Li et al [74] Spherical Tan et al [77] Spherical Tsuji [79] Polystyrene ( Langston [80] Polystyrene Li et al [83] Spherical Recently, studies about fine particle simulations have been increased. By applying CFD-DEM approach, Chen et al [84] numerically investigated the particle transport and deposition in pulmonary airway, and the simulation results were compared with experiment results.…”

Particle Modelling with the Discrete Element Method

“…The papers within this special issue cover a significant effort by the authors, in the framework of the EU-FP7 Marie Curie ITN (Initial Training Network) PARDEM (see www.pardem.eu) in deploying various aspects of DEM. A range of industrial application examples are studied (silo flow [18], mixing [19], and segregation [20]); for large, granular particles as well as two-phase systems (fluidized beds [21] or pneumatic conveying [22]); and cohesive powders (cone penetration and unconfined strength testing [23], dosing of cohesive food powder [24]), as well as the more fundamental issues of fine powder testing with different devices and the extremely slow stress-relaxation in such systems [25]. On the macroscopic level several important questions are addressed, such as the effect of the particle size-ratio on the bulk stiffness of granular mixtures [26] as well as the asymmetry of stress tensor arising from a micropolar formulation [27].…”