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首页> 外文期刊>International Journal of Multiphase Flow >A unified model to predict flow pattern transitions in horizontal and slightly inclined two-phase gas/shear-thinning fluid pipe flows
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A unified model to predict flow pattern transitions in horizontal and slightly inclined two-phase gas/shear-thinning fluid pipe flows

机译：统一的模型来预测水平和略倾斜的两相气/切稀流体管道中的流型转变

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Flow pattern transitions in two-phase gas/shear-thinning fluid pipe flows represent a key aspect during oil transportation and in chemical industry. In this paper a unified model to build a complete flow pattern map is proposed and models to predict flow patterns are provided. The transitions from stratified flow regime are investigates performing a linear stability and well-posedness analyses, and a non-linear stability analysis. The steady and fully developed two-fluid model for the annular flow is proposed and validated; the flow pattern transition from the annular flow is discussed considering, also, the structural stability. The transition to dispersed flow, the slug stability approach, and criteria to obtain the slug/plug and the bubbly/plug boundaries are considered. A sensitivity analysis on the effect of the rheology of the shear-thinning fluid on flow pattern boundaries is carried out and, then, the complete flow pattern maps are validated with data taken from the literature showing a good agreement. (C) 2016 Elsevier Ltd. All rights reserved.
机译：气体/剪切稀疏流体两相流中的流型转换代表了石油运输和化学工业中的一个关键方面。本文提出了建立完整流型图的统一模型，并提供了预测流型的模型。研究了从分层流动状态的过渡过程，进行了线性稳定性和适定性分析，以及非线性稳定性分析。提出并验证了稳定且充分发展的环形流动的双流体模型。讨论了从环形流到流型的转变，同时还考虑了结构稳定性。考虑了向分散流的过渡，段塞稳定性方法以及获得段塞/塞子和气泡/塞子边界的标准。对剪切稀化流体的流变性对流型边界的影响进行了敏感性分析，然后，使用从文献中获得的良好一致性的数据验证了完整的流型图。 （C）2016 Elsevier Ltd.保留所有权利。

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