Flow Characteristics of Vibrating Powder Bed

Abstract

The flow characteristics of powders have been evaluated by using a vibrating powder tester. A detecting sphere attached to the force transducer is displaced horizontally within the powder bed at various rates. The resistance force has been measured as a function of the displacement velocity of the sphere. The relationship between force and displacement velocity has been described by a rheological model of the type τ=m(d_v/d_y)ⁿ. The coating effect of a small amount of fine powder on the change of the flow characteristics of powder bed was measured.