Department of Mathematics
University of Tennessee, Knoxville, TN 37996, USA.
and Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
email: alexiades@utk.edu
Vasilios Alexiades
Abstract:
Methane hydrates, in arctic permafrost and deep ocean sediments,
store vast amounts of methane, which is the primary constituent of
natural gas and a potent greenhouse gas.
Methane hydrate is a crystaline solid consisting of methane
surrounded by frozen water molecules. It is stable in a narrow range
of high pressures and low temperatures. Thus, issues affecting the
stability of hydrate layers and phase change processes that may
disturb this stability are of utmost importance.
We present simulations with an isobaric compositional thermal model,
based on conservation laws for species and energy,
which allows composition, temperature, and pressure dependence
of material properties, with thermodynamically consistent treatment
of phase behavior via equations of state.
Published April 15, 2009.
Math Subject Classifications: 92C45, 35K60, 65M99.
Key Words: Phase change; enthalpy; heat conduction; diffusion; thermochemistry;
gas hydrates; finite volume scheme.
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Vasilios Alexiades Department of Mathematics University of Tennessee, Knoxville, TN 37996, USA. and Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA. email: alexiades@utk.edu |
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