Particle resuspension is concerned with how particles adhering to a surface are detached from a surface and re-entrained into the flow.

The usual measure is a resuspension rate (units in 1/s), which corresponds to the mass of resuspended particles per unit time and per unit surface divided by the surface concentration.

Particles resuspension occurs are in a range of environmental and industrial situations, including:
   + Sand resuspension from dunes (responsible for sand dune dynamics and also related to the transport of sand across oceans)
   + Resuspension of dust in ventilation systems
   + Walking-induced resuspension of contaminated aerosols in hospitals
   + Resuspension of sediments in rivers

The resuspension of a particle adhering to a surface results from a rupture of balance between the forces that tend to move the particle (e.g. hydrodynamic drag or lift) and the forces preventing its motion (surface adhesion, contact friction, buoyancy).