Aerodynamic properties of fractal grains - Implications for the primordial solar nebula
P. Meakin, B. Donn;
ApJ, 1988, 329, L39
ABSTRACT:Gas-grain and grain-grain interactions have a significant role in the evolution of the primordial solar nebula.
There is also compelling evidence for
larger grains in dense interstellar clouds than in the diffuse interstellar
medium.
In the usual treatments of grain collisions, where it is assumed that
collisions produce compact bodies with a constant density, the gas drag decreases
rapidly with size.
The first step toward a quantitative analysis of the
aerodynamic behavior of fractal aggregates is reported here, and it is shown that
for fractals drag decreases very slowly.
KEYWORDS: grains, interstellar matter, planetary nebulae, solar system, aerodynamics, astronomical models, clusters, fractals
PERSOKEY:dust, size distribution, ,
CODE: meakin88