Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990icar...84..118k&link_type=abstract
Icarus (ISSN 0019-1035), vol. 84, March 1990, p. 118-153.
Astronomy and Astrophysics
Astronomy
23
Astronomical Models, Cometary Atmospheres, Cosmic Dust, Gas Jets, Comet Nuclei, Dynamic Models, Gas Pressure, Time Dependence, Comets, Jets, Dynamics, Models, Time Dependency, Dust, Gases, Symmetry, Atmosphere, Momentum, Energy, Distance, Ejecta, Comet Nuclei, Calculations, Parameters, Boundaries, Pressure, Density, Temperature, Velocity, Isotrophy, Evolution, Procedure, Numerical Methods
Scientific paper
The present time-dependent, axisymmetric dusty gas dynamical model of inner cometary atmospheres solves the coupled and time-dependent equations of continuity, momentum, and energy for a gas-dust mixture between the surface of the nucleus and 100 km, using an axisymmetric 40 x 40 grid structure. A novel numerical method employing a second-order accurate Godunov-type scheme with dimensional splitting is used to solve the time-dependent pde system. It is established that a subsolar dust spike not predicted by previous calculations is generated by narrow axisymmetric jets, together with a jet cone whose opening angle depends on the jet length.
Gombosi Tamas I.
Korosmezey A.
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