Simulation of flow behavior of liquid and particles in a liquid–solid fluidized bed

Hydrodynamic analysis of a liquid-solid fluidized bed via CFD-DEM simulations, stability analysis, and tomography

“…simulations on a bi-dispersed LSFB and found that greater particle segregation is attainable with an increase in liquid superficial velocity. Wang et al (2012) found that the liquid and particle axial velocities differ in magnitude and trend with varying liquid superficial velocities. Liu et al (2016) also reported varying trends in axial particle velocity profiles with a change in liquid superficial velocity when studying a 2D LSFB.…”

“…In addition, a consensus can be found in literature regarding the validity of the omission of Basset force in CFD-DEM simulations of LSFBs. The explanation was due to the lack of reliable formulations (Wang et al, 2012), and the increase in computational time (Moreno-Casas & Bombardelli, 2016). A summary of the inclusion and omission of interaction forces in CFD-DEM simulations of LSFB literature is presented in Table 1.…”

“…the coefficient of restitution (COR), coefficient of sliding friction (µs), and coefficient of rolling friction (µr) is highly prevalent in CFD-DEM simulations of LSFBs (Al-Arkawazi et al, 2017;Di Renzo et al, 2011;Di Renzo & Di Maio, 2007;Ghatage et al, 2014;Peng et al, 2014Peng et al, , 2016. Wang et al, (2012) and Sen et al (2014) reduced the COR to one constant value of 0.3, and 0.2, respectively, to account for the presence of surrounding liquid, however, no further calibration was conducted. simulations on a bi-dispersed LSFB and found that greater particle segregation is attainable with an increase in liquid superficial velocity.…”

Shell Crystallization in Granular Hopper Flow

“…where λ is named to be the global dispersity of particles. The local orientational factor q6 [48,49] and the granular temperature [50] are calculated in our system. The q6 of the i-th particle is given by:…”

Solid components separation from heterogeneous mixtures through turbulence control

“…Such a flow process frequently occurs in multi-scale type structures, presenting a time diffusion scale, a time convection scale, time heterogeneous reaction, etc., e.g., in fluidized bed material systems [30]. Until now, the problem of the segregation of solid particles from fluid-solid mixtures, which is mainly related to fluidized bed system applications, has only been studied using Eulerian-Lagrangian models (continuum equations to describe the fluid flow [31][32][33]). In our opinion, the dynamics of multi-scale-type structures can be properly handled only within the mathematical formalism of the SRT.…”