Journal
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
Volume 52, Issue 2, Pages 365-376Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijmecsci.2009.10.008
Keywords
Gas hydrates; Hydrate dissociation; Geomechanics; Seabed ground
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We present a numerical analysis of gas hydrate dissociation in hydrate-bearing sediments in the seabed ground. Behavior of multiphase materials has been described within the framework of a macroscopic continuum approach through the use of the theory of porous media. The proposed simulation method has been developed based on chemo-thermo-mechanically coupled analysis, taking into account phase changes from solids to fluids, that is, water and gas, flow of water and gas, heat transfer, and ground deformation. From the numerical results, it has been found that ground deformation is induced by generation and dissipation of water and gas, and by reduction of soil strength due to the loss of hydrates. (C) 2009 Elsevier Ltd. All rights reserved.
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