Hydrodynamic and heat transfer characteristics of glass bead-water flow ina vertical tube

Pressure loss and heat transfer characteristics of the glass bead-water flo w were investigated. Three different sizes (d(p) = 1.5 mm, 3.0 mm, 4.0 mm) of particles having 2.54 specific gravity were tested. The particles augmen ted the heat transfer as well as increased the pressure loss. The enhanceme nt increased as the particle volume fraction increased and as the flow velo city decreased. Through the flow visualization study, the heat transfer and pressure loss characteristics of the slurry flow are shown to be closely r elated with the particle behavior near the wall, i.e., wall hitting frequen cy, particle slip velocity, etc.