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Axial symmetrical thermal conduction and phase transformations in THF hydrate-bearing sediments
Zhang XH(张旭辉); Lu XB(鲁晓兵); Shi YH(石要红); Xia Z(夏真)
Source PublicationProceedings of the Tenth ISOPE Ocean Mining (& Gas Hydrates) Symposium
Conference Name10th (2013) ISOPE Ocean Mining (& Gas Hydrates) Symposium
Conference DateSEP 22-26, 2013
Conference PlaceSzczecin, POLAND
AbstractThermal conduction and phase transformation are physical-chemical processes during the dissociation of gas hydrate-bearing sediments. Heat transfer leads to the expansion of hydrate dissociation front and the weakening of soils accompanied by the seepage of fluids and the deformation of sediments. As a consequence, ground failure may occur which can damage engineering structures and lead to environmental disasters. Hydrate dissociation in sediments is investigated using tetrahydrofuran (THF) hydrate sediments under various thermal strengths, and the time-dependent development of a hydratedissociation front is elucidated. An axial-symmetrical theoretical model and a numerical method are proposed based on experimental observations and analysis of the physical processes. Numerical and experimental results for evolution of the hydrate-dissociation front are in good agreement.
KeywordHydrate Dissociation Phase Transformation Front Thermal Conduction Axial Symmetry
Indexed ByEI
Document Type会议论文
Corresponding AuthorZhang XH(张旭辉)
Recommended Citation
GB/T 7714
Zhang XH,Lu XB,Shi YH,et al. Axial symmetrical thermal conduction and phase transformations in THF hydrate-bearing sediments[C]Proceedings of the Tenth ISOPE Ocean Mining (& Gas Hydrates) Symposium,2013:63-68.
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