Numerical simulation of electrostatic charge in powder pneumatic conveying process

Effects of an electrostatic field in pneumatic conveying of granular materials through inclined and vertical pipes

“…The mechanism of hydrodynamically driven segregation could be deliberately and fully suppressed by choosing appropriate closures for their particle-phase pressure. Watano et al (2003) and Watano (2006) proposed a model for analysis and prediction of particle electrification and showed that the electrification of particles during pneumatic conveying depended on the number of particle collisions against the pipe wall and the normal component of the impact velocities. More recently, computer simulations of pneumatic conveying carried out by Lim et al (2006) using the discrete element method (DEM) and computational fluid dynamics (CFD) without consideration of electrostatic effects showed that such effects were unnecessary for the formation of most flow regimes observed by Rao et al (2001) and Zhu et al (2003) experimentally.…”

A combined experimental and numerical approach to explore tribocharging of pharmaceutical excipients in a hopper chute assembly

“…One of the drawbacks of these models is that they ignore the discrete nature of powders and do not account for any electrostatic forces. Watano et al (2003) has used a 2D discrete element model to analyze particle flow during pneumatic conveying. The model is restricted as it uses a limited number of particles and assumes that electrification of particle is proportional to the collision velocity.…”

Prediction of particle charging in a dilute pneumatic conveying system

“…They also investigated the effect on the drag force and the electric field generated due to the electrostatic force. Watano et al 19 performed DEM simulations as well as experiments to investigate electrostatic charging when a pile of PMMA particles was blown through a horizontal pipe. They found that the number of wall collisions and the vertical component of the impact velocity are important parameters for charging.…”