Numerical simulation of particle motion in vibrated fluidized beds

A novel methodology for simulating vibrated fluidized beds using two-fluid models

“…The first configuration (configuration 1) consists of a slim bed that has been subject to previous Lagrangian Eulerian (DEM) sim ulations [23,24]. This configuration has been selected here to ana lyze the consistency of two fluid models with the DEM simulation strategy.…”

“…Besides, Johnson and Jackson's boundary conditions [35] were employed for the granular temperature at the lateral walls of the bed. For the slim bed (configuration 1), in accordance to the DEM simulations by Tatemoto et al [23] and Xiang et al [24], the parti cle to wall restitution coefficient was set to e pw = 0.9. For the high amplitude vibrating bed (configuration 2) the wall restitution coefficient was lowered to the code default value (e pw = 0.2) since no experimental information at this regard was available.…”

“…This allows the description of all the resulting particle particle and particle wall collisions [21,22]. Tatemoto et al [23] and Xiang et al [24] used the Lagrangian Eulerian method to simulate the motion of Geldart group B particles in a vibrated two dimensional bed that was fluidized with air. The thickness of the simulated bed was equal to the particle diameter and 1500 particles were considered.…”

“…Changes in void fraction and air pressure fluctuations with time obtained from the simulation were analyzed and the distribution of particles in the bed was compared to experimental results [23]. Xiang et al [24] also studied the distribution of velocity and concentration of particles at different amplitudes and frequencies of vibration, providing valuable qualitative information on the VFB behavior. Nevertheless, as stated in [24], quantitative evalua tion of the data was difficult since the number of particles in the calculation was too small.…”

“…Xiang et al [24] also studied the distribution of velocity and concentration of particles at different amplitudes and frequencies of vibration, providing valuable qualitative information on the VFB behavior. Nevertheless, as stated in [24], quantitative evalua tion of the data was difficult since the number of particles in the calculation was too small. The Lagrangian Eulerian approach has been also employed in the simulation of three dimensional (3 D) VFB.…”