Discrete particle simulations of an electric-field enhanced fluidized bed

Effects of external electric field on bubble and charged particle hydrodynamics in a gas–solid fluidized bed

“…It seemed from Fig. 11 that the charged particles displayed different motion trends compared to the above mentioned conclusions of Kashyap et al [53] and van Willigen et al [27]. That was due to the focus point in the present work is different.…”

“…The electrostatic force was composed of Coulomb force, Dielectrophoretic force and Electrostrictive force, corresponding to the first, second and third terms on the right-hand side of Eq. (27). Since the Dielectrophoretic force and Electrostrictive force was both generated by the polarization effects, the summation of these two forces was named the polarization force.…”

“…When the electric field was 3 times of the gravity, the bed expansion decreased and the nanoparticles agglomerated. van Willigen et al [27] found when the external electric field strength was increased, the particles formed strings in the direction of the electric field. In this work we investigated the instantaneous velocity distribution of positively charged particles at t = 0.20 s, as shown in Fig.…”

“…By increasing the charge magnitude on mono-charged particles and adding bipolar charged particles into the bed, the bubble size, the solid diffusivity and the voidage distribution were all changed. van Willigen et al [27] used the discrete particle model (DPM) to simulate the fluidized bed with external electric field, and explained the reason of bubble size reduction. However, only the particle displacement polarization effect was included in his model, the self-generating electric field of the charged particles was beyond consideration, although it could play an important role in the external electric field effects.…”

Discrete Particle Simulation of Gas-Solid Flow in Air-Blowing Seed Metering Device

“…CFD-DEM has been widely used in numerous research areas, since it can be used to analyze the discontinuous movement of individual particles, as well as the continuous movement, such as the velocity fields and air pressure fields, etc. The most common applications are for industry, like the fluid bed [14][15][16][17][18], impact pulveriser [19], pneumatic conveying [20][21][22], blast furnace [23][24][25], cyclone separator [26], drying process [27], etc. For agriculture, the related reports are still few.…”