Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icar...55..218p&link_type=abstract
Icarus (ISSN 0019-1035), vol. 55, Aug. 1983, p. 218-230. Research supported by the Centre National de la Recherche Scientifique
Astronomy and Astrophysics
Astronomy
20
Enceladus, Energy Dissipation, Ice, Satellite Surfaces, Tides, Viscoelasticity, Lossy Media, Maxwell Bodies, Melting Points, Orbital Elements, Planetary Temperature, Volcanology, Saturn, Satellites, Enceladus, Icy Bodies, Tidal Effects, Viscosity, Elasticity, Dissipation, Mathematical Models, Power, Water Ice, Data, Temperature, Grains, Size, Orbits, Eccentricity, Physical Properties, Calculations, Rheology, Deformation, Thermal Properties, Evolution
Scientific paper
Tidal dissipation is investigated in a viscoelastic homogeneous sphere having the orbital and physical characteristics of the icy inner satellite of Saturn, Enceladus. The dissipated power is calculated for Kelvin-Voigt and Maxwell rheologies, whose dissipation function can be expressed in terms of viscosity. Expressions for the dissipated power as a function of viscosity is calculated in both cases and compared to the expression found for a lossy elastic body. A physical law relating viscosity of water ice to temperature and grain size is introduced and the feedback between dissipated power and temperature is investigated. It is found that tidal dissipation with current orbital eccentricity alone canot account for the surface activity observed on Enceladus, if it is composed of water ice.
Boloh L.
Chambon P.
Poirier Jean-Paul
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