Abstract
Randomly packed bed of mono-sized spheres is generated by a computer simulation under the condition that a clearance between particle surfaces is larger than 0.4nm. The void fraction, the coordination number and the adhesion strength of packed bed are calculated from the simulation results and the correlations of these properties are investigated. As a result, the particle size significantly affects the coordination number as well as the void fraction. Since most of the powder bed properties depend on the interacting distance between particle surfaces, the coordination number has be varied depending on the powder bed properties.