A comprehensive numerical study of transient two-phase flow for slug capturing simulations

IF 3 3区工程技术 Q3 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Computers & Fluids Pub Date : 2025-09-03 DOI:10.1016/j.compfluid.2025.106814

Carina Nogueira Sondermann , Raphael Viggiano , Felipe Bastos de Freitas Rachid , Gustavo Cesar Rachid Bodstein , Eduardo Pereyra

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引用次数: 0

Abstract

Numerical simulations of intermittent two-phase flow are important to monitor and predict the behavior of the flow along a pipe. Previous works have proved that the transient one-dimensional two-fluid model is capable of capturing slugs as a result of the flow dynamics. Building on previous studies, this work extends and enhances the methodology by implementing and studying in detail the two-fluid model, in combination with different numerical solutions. The mathematical model has five equations, is unconditionally hyperbolic, and is fully tested for benchmark problems. From this analysis, the numerical model that presents the best results is used to calculate intermittent flow through the slug capturing approach. Moreover, a strategy to model the gas velocity in the slug body based on the instantaneous velocity relaxation is proposed. The results demonstrate that the numerical model is robust, capable of performing slug capturing simulations, and represents the physics of the flow.

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段塞捕获模拟瞬态两相流的综合数值研究

间歇两相流的数值模拟对于监测和预测管道流动特性具有重要意义。以往的工作已经证明，瞬态一维双流体模型由于流动动力学的原因能够捕获段塞。在以往研究的基础上，本工作通过实施和详细研究双流体模型，结合不同的数值解，扩展和增强了方法。该数学模型有五个方程，是无条件双曲的，并对基准问题进行了充分的测试。从这个分析中，给出了最佳结果的数值模型被用于通过段塞捕获方法计算间歇流动。此外，提出了一种基于瞬时速度弛豫的段塞体内气体速度建模策略。结果表明，该数值模型具有较强的鲁棒性，能够进行段塞捕获模拟，并能较好地反映流体的物理特性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Computers & Fluids 物理-计算机：跨学科应用

CiteScore

5.30

自引率

7.10%

发文量

242

审稿时长

10.8 months

期刊介绍： Computers & Fluids is multidisciplinary. The term ''fluid'' is interpreted in the broadest sense. Hydro- and aerodynamics, high-speed and physical gas dynamics, turbulence and flow stability, multiphase flow, rheology, tribology and fluid-structure interaction are all of interest, provided that computer technique plays a significant role in the associated studies or design methodology.