Physics
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.9107t&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. E5, p. 9107-9111.
Physics
13
Convection, Gas Jets, Plumes, Venus (Planet), Volcanoes, Gas Expansion, Mathematical Models, Runge-Kutta Method, Venus Atmosphere, Venus, Eruptions, Plumes, Model, Theoretical Studies, Dynamics, Flows, Parameters, Temperature, Density, Velocity, Radius, Atmospheric Pressure, Volatiles, Altitude, Pyroclastics, Stability
Scientific paper
A theoretical model of eruption plume dynamics (Woods, 1988) is used to investigate Plinian eruption columns on Venus. Results for a typical plume, in terms of the temperature, density, velocity, and radius as a function of height are given. The effects of the atmospheric pressure, the volatile content and species, and the eruption temperature on the development of high convecting plumes are discussed, demonstrating the combinations of initial conditions giving rise to either high convective plumes, or low fountains feeding pyroclastic flows. The results show that the development of high convecting plumes on Venus requires an unlikely combination of high volatile contents, high initial temperatures, and high altitude eruptions, leading to the conclusion that explosive eruptions on Venus will generally lead to pyroclastic flows.
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