Evaluation of elastic and inelastic contact forces in the flow regimes of Titania nanoparticle agglomerates in a bench-scale conical fluidized bed: A comparative study of CFD-DEM simulation and experimental data

Fluidisation behaviour and wall effects of cohesive hydrotalcite powder in a micro-fluidised bed

“…Geldart C powders have been fluidised in the literature using a variety of methods such as vibration, additional energy fields (acoustic, magnetic, and electric), and mechanical stirring [38]. In contrast, by simply sieving, pre-fluidising, and mixing the particles with a secondary material, we achieve similar improvements but with clear advantages: easy implementation, low-cost, no need to modify the reactor design, and no need for additional instruments/tools [38,39]. Our simple treatments produce fluidisation characteristics resembling Geldart A particles.…”

A combined experimental and multiscale modeling approach for the investigation of lab-scale fluidized bed reactors

“…All in all, this work shows the potentiality of coupling first-principles numerical approaches with experiments which can allow for the fundamental investigations of both existing and novel catalytic fluidized systems [29][30][31][32] and also for the hierarchical refinement of less detailed numerical approaches (i.e., Euler-Euler models 33 ) for the simulation and testing of industrial-scale devices.…”

Particle Adhesion Effects on Particle Size Distribution of Titania Nanoparticle Agglomerates in a Conical Fluidized Bed: A Computational Fluid Dynamics and Discrete Element Method Adhesive Approach

“…Conical fluidized beds designed with a lower conical part and an upper cylindrical part have suitable fluidization characteristics of fluidized and spouted beds. − The conical fluidized beds can provide a suitable mixing of powders, creating homogeneity in heat and mass transfer in both chemical and physical techniques. − In addition, conical fluidized beds have been extensively employed in drying and mixing processes of fine, sticky, high-density and coarse particles in the chemical, pharmaceutical, and food industries. , The fluidization behavior of fine particles in conical fluidized beds is similar to that seen in the spouted beds, where particles move upward in the spout zone located around the axis of the bed, then reach the top of the bed material known as the fountain zone, and finally move downward in the region between the spout zone and wall, the so-called annular zone. − Based on the potential industrial applications, the conical fluidized beds facilitate the fluidization of bed materials containing a broad particle size distribution (PSD). ,,− …”

“…The contact forces caused by particle–particle or particle-wall collisions are described using the contact models. Several contact models have been discussed in the literature, ,,, namely, elastic contact model (Hertz theory), elastic–plastic contact model, viscoelastic contact model (spring-dashpot), adhesion contact model (Johnson–Kendall–Roberts, JKR model), and tangential stiffness model (Hertz–Mindlin, H–M model). The concept of each model is described based on the elasticity, viscosity, hydrophilicity, and other related physical properties of primary NPs. , …”