Abstract
Problems of the freezing and decomposition of gaseous hydrates on gas pipeline walls are considered. This process is governed by heat transfer between the gas and surrounding rocks. Simultaneous study of the transport equations in the tube and the heat conduction equations in the hydrate and surrounding rocks makes it possible to follow the variation of the thickness of the hydrate layer in time and with respect to the coordinate. It is shown that there exist gas flow regimes in which there is self-purification of the tube wall of hydrate due to heating of the surrounding rocks. On the other hand, it is possible to have regimes in which there is complete blocking of the flow section by the hydrates.
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