Abstract The simultaneous flow of gas, oil, and water forms various flow patterns due to the complex interfacial relationships. Three-phase flow patterns are classified as the gas-liquid and liquid-liquid flow patterns. Pressure drop, void fraction, liquid holdup, and phase distribution are important characteristics of the three-phase flow. These characteristics are generally associated with the three-phase flow patterns. Hence, the knowledge about flow patterns can help to predict the overall behavior of the three-phase flow. Studies have been conducted to identify three-phase flow pattern and their characteristics at various superficial velocities of gas, oil, and water. The major purpose of the studies is to gather information about the three-phase co-current flow and use it for improvement of the efficiency of the flow systems. Therefore, the accuracy of the measurement technique is critical. Several types of flow pattern identification and measurement techniques have been developed to improve accuracy and provide high-quality results. In this article, classical and advanced techniques used for the three-phase flow identification and measurement have been reviewed. The survey will help the researchers working in the area of multiphase flow to choose the right technique based on the objectives of the studies.

中文翻译：

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气液液三相流流型识别与测量技术综述

摘要 气、油、水同时流动，由于界面关系复杂，形成多种流型。三相流型分为气液流型和液液流型。压降、空隙率、持液率和相分布是三相流动的重要特征。这些特性通常与三相流动模式相关。因此，有关流动模式的知识可以帮助预测三相流的整体行为。已经进行了研究，以确定在气、油和水的各种表观速度下的三相流动模式及其特征。研究的主要目的是收集有关三相并流的信息，并将其用于提高流动系统的效率。所以，测量技术的准确性至关重要。已经开发了几种类型的流型识别和测量技术，以提高准确性并提供高质量的结果。本文综述了用于三相流识别和测量的经典和先进技术。该调查将帮助在多相流领域工作的研究人员根据研究目标选择正确的技术。