Effect of grinding nozzles pressure on particle and fluid flow patterns in a spiral jet mill

Spiral jet mills utilise high-pressure gas jets, which induce particle breakage by collisions. Appropriately angled jets force particles to circulate in dense phase near the wall due centrifugal field. Moving radially inwards towards mill centre, two-phase flow is transformed into a lean and fine are entrained out fluid drag. Here we analyse effect of grinding nozzles pressure on dynamics numerical simulation. The average velocity gradient radial direction very steep for low mass loadings, indicative rapid shearing, but it decreases significantly as loading increased. dissipated collisional energy, accountable size reduction, strongly influenced penetration through circulating bed, turn depends operating nozzles. As result penetration, becomes less effective at high pressures. analysis developed here elucidates coupled accounts breakage. • role spiral simulated using CFD-DEM. A bed formed field induced jets. At loadings become submerged. Jet has strong influence energy. Grinding nozzle