Mathematics
Scientific paper
Feb 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999kosis..37...70k&link_type=abstract
Kosmicheskie Issledovaniia, Tom 37, No. 1, p. 70 - 85
Mathematics
Cometary Comae: Models, Cometary Comae: Dust, Cometary Comae: Structure
Scientific paper
The authors discuss the problem of constructing adequate mathematical models for a dusty gas flow in a cometary coma. A kinetic approach is used to reveal specific regimes (modes) of the flow and to determine the boundaries of these regimes depending on the ratio of gas molecule and dust particle masses, as well as on the ratio of numerical concentrations of these fractions. In each mode the appropriate gas dynamic equations are given, which describe the evolution of the flow in terms of a set of macroscopic variables. A comparison of the obtained models with some widely used models is made. The main conclusion from this study is that all macroscopic flow regimes cannot be described by a single universal macroscopic model.
Itkin A. L.
Kolesnichenko E. G.
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