Investigation of the influence of wetting on the particle dynamics in a fluidized bed rotor granulator by MPT measurements and CFD-DEM simulations

Grohn, Philipp; Oesau, Tobias; Heinrich, Stefan; Antonyuk, Sergiy

doi:10.1016/j.powtec.2022.117736

Cited by 8 publications

(16 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the two times higher bed height and the lower particle bed density in the bed, the cylindrical particles also reach a higher axial velocity than the spheres during their vertical motion. An effective possibility to describe the particle dynamics in the poloidal plane is provided by the value of the radial movement proportion (RMP) developed in our previous work [53]. RMP describes the proportion of the radial velocity to the total velocity in xy-plane of the particles.…”

Section: Particle Velocitymentioning

confidence: 99%

CFD‐DEM Simulation of Superquadric Cylindrical Particles in a Spouted Bed and a Rotor Granulator

Grohn

Schaedler

Atxutegi

et al. 2022

Chemie Ingenieur Technik

Self Cite

View full text Add to dashboard Cite

Dedicated to Prof. Dr.-Ing. Joachim Werther on the occasion of his 80th birthdayThe fluidization behavior of cylindrical particles in a spouted bed was first investigated experimentally using a camera setup. The obtained average spouted bed height was used to evaluate the accuracy of different drag models in CFD-DEM simulations with the superquadric approach to model the particle shape. The drag model according to Sanjeevi et al. showed the best agreement. With this model, cylindrical particles were simulated in a rotor granulator and the particle dynamics were compared with the fluidization of volume equivalent spherical particles.

show abstract

Section: Particle Velocitymentioning

confidence: 99%

CFD‐DEM Simulation of Superquadric Cylindrical Particles in a Spouted Bed and a Rotor Granulator

Grohn

Schaedler

Atxutegi

et al. 2022

Chemie Ingenieur Technik

Self Cite

View full text Add to dashboard Cite

show abstract

“…The fluidization gas flow passes through an annular gap between the rotating plate and the cylindrical wall. This combination enables the individual process steps of spheronization, coating and drying to be carried out in the same unit [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…A detailed knowledge of the particle motion on the micro level is required to better understand the coating process in the rotor granulator. Numerical simulations are particularly suitable for this purpose [ 5 , 8 ]. The widely used Euler–Lagrange approach can be applied to simulate the multiphase flow, where Computational Fluid Dynamics (CFD) is coupled with the Discrete Element Method (DEM) [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

“…This particle size was required by the MPT measurement equipment available at that time. In our last study [ 8 ], the dynamics of initially wetted particles in the FBRG was investigated numerically by CFD-DEM simulations and experimentally by an improved MPT measurement system. In the numerical simulations, the capillary forces due to the presence of liquid on particles were considered based on the model of Israelachvili [ 23 ] and the viscous forces were calculated according to the models of Lian et al [ 24 ] and Popov [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

“…In the numerical simulations, the capillary forces due to the presence of liquid on particles were considered based on the model of Israelachvili [ 23 ] and the viscous forces were calculated according to the models of Lian et al [ 24 ] and Popov [ 25 ]. In addition, a new model was implemented to describe the velocity-dependent rupture length of liquid bridges [ 8 , 26 ]. With the improved MPT equipment, the particle dynamics of spherical particles with a minimum diameter of 2.8 mm could be measured.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical Investigation of the Particle Dynamics in a Rotorgranulator Depending on the Properties of the Coating Liquid

2023

Self Cite

View full text Add to dashboard Cite

In the pharmaceutical industry, the coating of particles is a widely used technique to obtain desired surface modifications of the final product, e.g., controlled release of the active agents. The production of round, coated particles is particularly important, which is why fluidized bed rotor granulators (FBRG) are often used for this process. In this work, Computational Fluid Dynamics (CFD) coupled with the Discrete Element Method (DEM) is used to investigate the wet particle dynamics, depending on the properties of the coating liquid in a FBRG. The DEM contact model was extended by liquid bridge model to account for capillary and viscous forces during wet contact of particles. The influence of the relative contact velocity on the maximum length of the liquid bridge is also considered in the model. Five different cases were compared, in which the particles were initially wetted, and the liquid loading as well as the surface tension and viscosity of the liquid were changed. The results show that increasing viscosity leads to a denser particle bed and a significant decrease in particle rotational velocities and particle motion in the poloidal plane of the FBRG. Reducing the liquid loading and surface tension results in increased particle movement.

show abstract

Interactions Between Particles and Surfaces

de Payrebrune,

Schönecker,

Antonyuk

et al. 2023

Springer Series in Advanced Manufacturing

View full text Add to dashboard Cite

Investigation of the influence of wetting on the particle dynamics in a fluidized bed rotor granulator by MPT measurements and CFD-DEM simulations

Cited by 8 publications

References 51 publications

CFD‐DEM Simulation of Superquadric Cylindrical Particles in a Spouted Bed and a Rotor Granulator

CFD‐DEM Simulation of Superquadric Cylindrical Particles in a Spouted Bed and a Rotor Granulator

Numerical Investigation of the Particle Dynamics in a Rotorgranulator Depending on the Properties of the Coating Liquid

Interactions Between Particles and Surfaces

Contact Info

Product

Resources

About