June 18, 2024
Babak Aghel

Babak Aghel

Academic rank: Associate professor
Address: Department of Chemical Engineering, Faculty of Energy, Kermanshah University of Technology (KUT), Imam Khomeini Highway, Kermanshah, Iran
Education: Ph.D in Chemical Engineering
Phone: 083-38305000 (1168)
Faculty: Faculty of Engineering


Efficiency Analysis of the Discrete Element Method Model in Gas‐Fluidized Beds
Type Article
Discrete element method, Euler-Lagrange model, Gas-fluidized bed, Particle-gridmethod, Stochastic collision model
Researchers Babak Aghel، Falah Alobaid، Christoph Graf، Bernd Epple


The efficiency and accuracy of the Euler-Lagrange/discrete element method model were investigated. Accordingly, the stiffness coefficient and fluid time step were changed for different particle numbers and diameters. To derive the optimum parameters for simulations, the obtained results were compared with the measurements. According to the results, the application of higher stiffness coefficients improves the simulation accuracy slightly, however, the average computing time increases exponentially. For time intervals larger than 5 ms, the results indicated that the average computation time is independent of the applied fluid time step, while the simulation accuracy decreases extremely by increasing the size of the fluid time step. Nevertheless, using time steps smaller than 5 ms leads to negligible improvements in the simulation accuracy, though to an exponential rise in the average computing time.