Dynamics of volcanic plumes on Io

Details Dynamics of volcanic plumes on Io Dynamics of volcanic plumes on Io

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979natur.280..743c&link_type=abstract

Nature, vol. 280, Aug. 30, 1979, p. 743-746.

Mathematics

10

Gas Dynamics, Io, Plumes, Spaceborne Photography, Trajectory Analysis, Volcanology, Aerodynamics, Equations Of Motion, Gas Flow, Mathematical Models, Planetology, Voyager Project

Scientific paper

Ballistic and aerodynamic models are proposed to explain the dynamics of the volcanic plumes on Io. A ballistic model, which assumes that eruptive gas and solid-particle flows become completely and permanently decoupled over a small distance as compared with the maximum particle height, is shown to be unable to account for the observed shape of Plume 3. An aerodynamic model which assumes the entrainment and transportation of solid particles by the gas flow into the central portion of the top of the plume, with ballistic particle trajectories only after passage through the first part of their descent, is then developed. The model accounts for plume shape by the formation of a weak decompression shock near the edge of the plume stalk, which constrains horizontal expansion until a sufficient altitude is reached. Calculated plume dimensions are then compared with observations of Ionian Plumes 1 and 3.

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