Influence of weak electrostatic charges and secondary flows on pneumatic powder transport

The dynamics of the transported powder determines functionality and safety pneumatic conveying systems. relation between carrier gas flow, induced by flown-through geometry, flow pattern is not clear yet for electrostatically charged particles. This paper highlights influence relatively minor cross-sectional secondary flows electrostatic forces on concentration To this end, direct numerical simulations (DNS) capture interaction continuous dispersed phases using a four-way coupled Eulerian–Lagrangian strategy. transport weakly particles in channel flows, where turbopheresis defines particle concentration, compared to duct additional vortices form. For both geometries, Stokes number ( S t = 8 , 32 ) electrical St el 0 1 2 4 × 10 ? 3 are varied, turbulent was fixed Re ? 360 . presented demonstrate that same dampen effect charge. In vortical enhance mobility against direction forces. Compared channel, wall-normal aerodynamic weaker. Thus, dominate their transport; local at walls increases. Further, charges cause stronger correlation velocities. conclusion, despite being weak primary forces, drive during transport.