Sometimes referred to as the inertial parameter; it is an index of the impactability
of an aerosol particle. It is defined by the equation:
where
is the diameter of a small drop,
is the difference in fall velocities of the drop and aerosol particles and
is the characteristic relaxation time of a particle.
Source:
PAC, 1990, 62, 2167
(Glossary of atmospheric chemistry terms (Recommendations 1990))
on page 2216
where
is the diameter of a small drop,
is the difference in fall velocities of the drop and aerosol particles and
is the characteristic relaxation time of a particle.