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首页> 外文会议>International pipeline conference >A MAXWELL-STEFAN APPROACH FOR PREDICTING MIXING EFFECTS IN CONTIGUOUS BATCHES OF MULTI-PRODUCT PIPELINES
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A MAXWELL-STEFAN APPROACH FOR PREDICTING MIXING EFFECTS IN CONTIGUOUS BATCHES OF MULTI-PRODUCT PIPELINES

机译：一种Maxwell-Stefan方法，用于预测多产品管道连续批次的混合效果

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Transient phenomena in the liquid batch interfacial zone are addressed based on: (ⅰ) a reliable compositional description; and (ⅱ) mass transfer modeling. In phase (ⅰ), compositional models are proposed for transported fluids, with parameters estimated by maximum likelihood procedures to match known characterizing data, like distillation curve, density, viscosity and heteroatom weight tractions. In phase (ⅱ), the transient mixing problem is posed on the continua of axial position in the duct, and described by Maxwell-Stefan formalism for multicomponent mass transfer between two contiguous semi-infinite fluids. Turbulent effects are considered on calculation of mass transfer coefficients, and rigorous thermodynamic driving forces are accounted for through component fugacities predicted by equations of state. The model was solved by the finite element method and the resulting set of ordinary differential equations in time was numerically integrated enabling determination of the mixing zone, calculation of property profiles and monitoring loss of product specifications.
机译：基于以下：（Ⅰ）可靠的组成描述;（Ⅰ）暂时现象（Ⅱ）传质造型。在阶段（Ⅰ）中，提出了用于运输流体的组成模型，参数估计，通过最大似然程序估计，以匹配已知的表征数据，例如蒸馏曲线，密度，粘度和杂原子重量诉讼。在相（Ⅱ）中，瞬态混合问题在管道中的轴向位置的连续轴上构成，并由Maxwell-Stefan形式主义描述了两个连续的半无限液体之间的多组分传质。关于传质系数的计算考虑了湍流效应，并且通过状态方程预测的组分履历，占严格的热力动力驱动力。该模型通过有限元方法解决，并且在时间上得到的常微分方程集在数值上集成了能够确定混合区，属性配置文件计算和监测产品规格的损失。

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