Area-based particle size


Particle size is a notion introduced for comparing dimensions of solid particles (flecks), liquid particles (droplets), or gaseous particles (bubbles).
The notion of particle size applies to
Colloidal particles.
Particles in ecology.
Particles present in granular material whether airborne or not.
Particles that form a granular material.
The particle size of a spherical object can be unambiguously and quantitatively defined by its diameter.
(A typical material object is likely to be irregular in shape and non-spherical. Then definition is based on replacing a given particle with an imaginary sphere that has one of the properties identical with the particle.)
Grain size (partical size) refers to the diameter of individual grains of sediment, or the lithified particles in clastic rocks.
Area-based particle size equals the diameter of the sphere that has the same surface area as a given particle.

Related formulas


DThe diameter of representative sphere (m)
AThe surface area of particle (m2)