A parametric study of the drying process of polypropylene particles in a pilot-scale fluidized bed dryer using Computational Fluid Dynamics

Abstract

This is a repository copy of A parametric study of the drying process of polypropylene particles in a pilot-scale fluidized bed dryer using Computational Fluid Dynamics.

Hydrodynamic Characteristics of an Internal Recycle Berty Catalytic Reactor in Batch/Continuous or Packed/Fluidized Bed Modes

“…where μ is the viscosity and α and C 2 denote the permeability and inertial resistance factor, respectively, which can be calculated using the Gidaspow model 64,65 through eqs 4 and 5.…”

“…ANSYS Fluent was used for the 3D, transient, and isothermal simulations in the ILS Berty reactor by adopting the multiple reference frame (MRF) model for the rotating domain based on a 60° slice model (1/6th of the reactor) ,, that was established and meshed by the ANSYS Workbench, for which rotationally periodic boundaries were adopted to mimic the whole reactor. The catalyst bed was assumed as a homogeneous porous zone, , where the permeability and inertial loss coefficient were calculated by the Gidaspow equation , with uniform particle diameters and assigned porosity. With the porous zone setting of the catalytic bed, the calculation is simplified to a single gas phase.…”

“…During modeling laminar flow through the porous media, the second term in eq can be dropped, with the laminar zone frame activated in the fluid dialog box, which means the turbulent model (SST k –ω model in this work) can be turned off for this specific zone. In this work, we considered the turbulence through the bed by keeping the turbulent model and adding the inertial loss term, while the flow though the Hastelloy meshes is regarded as laminar. where μ is the viscosity and α and C 2 denote the permeability and inertial resistance factor, respectively, which can be calculated using the Gidaspow model , through eqs and . where K is the interphase momentum exchange coefficient, ε is the volume fraction, and d is the particle diameter or equivalent particle diameter for nonspheres. Also, the subscripts s and g represent the solid phase and gas phase, respectively, and C D is the drag coefficient.…”

Flow Pattern and Mixing Performance of a Dynamic Impinging Stream Reactor

“…It provides good conditions for the formation of a high-turbulence impingement region and enhances mass and heat transfer. Therefore, the impinging stream reactor has unique advantages and application potential in combustion, grinding, drying, and pulverization [2][3][4][5].…”

A detailed investigation of the temperature-controlled fluidized bed solar dryer: A numerical, experimental, and modeling study

“…Also, FBD systems investigated by using CFD approach to determine their behavior. Nabizadeh et al [33] modeled FBD process of chemical products using CFD. They analyzed various gas distribution modifications and working conditions.…”