Fractal Modelling Of The Carbonaceous Aerosol
Author(s)
B. Bessagnet & R. Rosset
Abstract
Most generally, atmospheric aerosol particles are ideally modelled as spheres for
which it is straightforward to calculate geometrical properties (diameter, surface
and volume) and ensuing radiative, dynamical and chemical characteristics.
However, the particles issued in particular from combustion processes display a
wide range of structures, from linear clusters to quasi spherical ones. These
various shapes result in quite different physical and chemical characteristics for
these particles : the processes of absorption, coagulation and deposition are
strongly affected by the fractal nature of such aerosols. Whereas only one
discretization parameter (diameter d) is required in the spectral distribution n(d)
of spherical particles, it is necessary to use a 2D distribution n(v,a) for fractal
ones, v and
Keywords
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