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• W4282020268 abstract "With the exploitation of deep-water hydrate, the limitations and worrying safety of traditional mining methods such as depressurization gradually pronounced. Therefore, multiphase transportation of slurry draw attention rapidly. Hence, it is necessary to clarify the gas–liquid–solid flow regularity in slurry pipelines and provide accurate guidance for engineering projects. Wherefore, a steady-state four-layer model was developed from Hernandez (2006). The novelties of this model are that the rheological properties of the hydrate slurries were introduced and the effects of concentration distribution (C(y)) both on the solid diffusivity (ε) and interference settling velocity (wm) were considered during the calculation of C(y) in the heterogeneous layer. After improvement, this model can effectively predict the flow state of gas and slurry in pipelines. A comparison with the previous model showed that the prediction accuracy of the proposed model is within 25% for the apparent viscosity and pressure drop gradient in the pipe, indicating that the rheological properties of the hydrate slurries have a non-negligible effect on the flow state. Moreover, the present model improves the prediction accuracy of the hydrate particle C(y) in the heterogeneous layer by considering the interaction between the ε, wm, and C(y). The prediction results of the proposed model for the C(y) and change rate near the interface between the heterogeneous layer and the moving bed layer were in good agreement with the experimental data. Finally, the change laws of the hydrate particle concentration distribution, bed height, and pressure drop gradient under different working conditions were analyzed. Compared with the previous model, there is no flow transition in the velocity range of 0.05–0.5 m/s, and an economic mean concentration exists among the different mean concentrations (CS), which can provide guidance for engineering projects." @default.
• W4282020268 created "2022-06-13" @default.
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• W4282020268 date "2022-09-01" @default.
• W4282020268 modified "2023-10-15" @default.
• W4282020268 title "Four-layer model of hydrate slurry flow in pipes considering rheological properties" @default.
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• W4282020268 doi "https://doi.org/10.1016/j.jngse.2022.104646" @default.
• W4282020268 hasPublicationYear "2022" @default.
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