Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979ap%26ss..65..383t&link_type=abstract
(Workshop on Thermodynamics and Kinetics of Dust Formation in the Space Medium, Houston, Tex., Sept. 6-8, 1978.) Astrophysics an
Astronomy and Astrophysics
Astrophysics
Chemical Properties, Computerized Simulation, Cosmic Dust, Interstellar Chemistry, Interstellar Matter, Nucleation, Molecular Interactions, Nonequilibrium Conditions, Phase Transformations
Scientific paper
An investigation of nucleation at chemical instabilities by means of microscopic computer simulation is presented. The first-order transition of interest involves a new kind of nucleation resulting from chemical transformations instead of physical forces, wherein the chemical state of the matter, and not matter itself, which is spatially localized to form the nucleus for transition between different chemical states. The concepts of chemical instability, nonequilibrium phase transition, and dissipative structure are reviewed, and recently developed methods of reactive molecular dynamics are applied to study of chemical nucleation in a simple model chemical reaction. Finally, the relation of these studies to nucleation and condensation processes involving physical and chemical interactions is investigated.
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