Context
Handling of powders - Particle size and shape analysis

A powder is an assembly of heterogeneous solid particles dispersed in a continuous gaseous phase, between which a multitude of interactions (van der Waals, capillary, electrostatic, etc.) take place. The overall behavior of a powder depends directly on these interactions and on the physical characteristics of the solid particles [J 2 245].

Particle size is undoubtedly the most sought-after parameter for a powder, both for predicting its behavior and for calculating the operations that involve it: storage, flow, separation, fluidization, heat exchange, chemical reactions, dispersion, dissolution,...