2021
DOI: 10.1021/acs.iecr.1c03670
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Numerical Studies on Particle Dynamics in a Spouted Bed

Abstract: A coupled computational fluid dynamics (CFD)discrete element method (DEM) technique has been adopted to examine the dynamic behavior of particles in a rectangular spouted bed. Eulerian method has been used to solve the Navier−Stokes equation for the gas phase (for the CFD) and Lagrangian method (for the DEM) for the particle phase, where the k−ϵ two-equation turbulence model has been used to capture the effect of gas-phase turbulence. In the present work, we sought to predict the minimum spouting velocity (U m… Show more

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Cited by 7 publications
(13 citation statements)
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“…It is worth noting that, to predict and confirm the minimum spouting velocity from the pressure drop−gas velocity profile, a parallel analysis of the void fraction contour is also essential. 41,51 Variations in the numerically obtained void fraction contour with increasing and decreasing gas velocities are shown in Figure 2i−n. When the gas velocity is decreased from a spouted state, below a critical value, the top spout above the bed collapses, and an increase in pressure drop is observed (point F in the profile).…”
Section: ■ Results and Discussionmentioning
confidence: 99%
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“…It is worth noting that, to predict and confirm the minimum spouting velocity from the pressure drop−gas velocity profile, a parallel analysis of the void fraction contour is also essential. 41,51 Variations in the numerically obtained void fraction contour with increasing and decreasing gas velocities are shown in Figure 2i−n. When the gas velocity is decreased from a spouted state, below a critical value, the top spout above the bed collapses, and an increase in pressure drop is observed (point F in the profile).…”
Section: ■ Results and Discussionmentioning
confidence: 99%
“…Similar observations for monodispersed particles are also reported in our earlier work. 41 The axial velocity (V z /U g ) is independent of particle size at any bed location. Away from the spout axis, a negative value of V z in the annulus and fountain zone signifies the downward motion of particles.…”
Section: ■ Results and Discussionmentioning
confidence: 99%
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