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(abstract) Multispecies Gas Flows in the Interior of Comets

Show simple item record Alexander, C.J. en_US Gombosi, T.I. en_US 2004-10-06T05:29:39Z 2004-10-06T05:29:39Z 1993-12-06 en_US
dc.identifier.citation San Francisco, CA en_US
dc.identifier.clearanceno 93-1726 en_US
dc.description.abstract A theoretical comet nucleus model has been written which employs 3 volatiles: CO, CO<sub>2</sub>, and H<sub>2</sub>O. It allows variations for equations of state: the Clausius/Clapeyron equation as well as other equations based on the latest thermodynamic data: the Brown/Ziegler relationship for CO<sub>2</sub> and CO at low pressure and the Lowe expression for water vapor at low pressure. It allows for variations in the physics of the outflow, from an essentially throttling mechanism (pure sublimation to space), to the Knudsen regime, to the Dusty-Gas Dynamic model. Variations in several parameters are explored. Results are compared with data from actual comets. None of the variations in parameter space produce a result that compares well with the comet data. All models yield a total gas production between 10&sup27; and 10&sup28; per second (low). This suggests that secondary mechanisms peripheral to this modeling effort, such as the opening and closing of cracks, a conductivity expression which depends upon porosity as well as temperature, etc., may play a more important role in the cometary efflux process than previously thought. en_US
dc.format.extent 66162 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.subject.other comets models cometary gases water ices CO carbon dioxide en_US
dc.title (abstract) Multispecies Gas Flows in the Interior of Comets en_US

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