一、概述多相流是研究不同相态或不同组份的物质同时存在并有明确分界面时的流体动力学以及其传热传质过程的规律.在许多工程问题以及自然界的流动中,必须处理许多不同相态或不同组份的物质混合流动的问题,通常把这种体系称为多相体系,称相应的流动为多相流,其中在工业生产过程中及自然界中比较多见的是气(汽)液两相流、气固两相流及液固两相流.两相以上的流动主要存在于石油工业中,如油、气、水三相流,甚至油、气、水、沙四相同时存在的流动.多相流是在流体力学、传热传质学、物理化学、燃烧学等学科的基础上发展起来的一门新兴学科,对国民经济的发展有十分重要的作用,它广泛存在于能源、动力、核 I. Overview Multiphase flow is the study of the laws of fluid dynamics and the heat and mass transfer processes when materials of different phases or different components coexist and have a clear interface. In many engineering problems and the flow of nature, To deal with the problem of mixed flows of many different phases or different components, this system is usually called a multi-phase system, and the corresponding flow is called multi-phase flow. Among them, industrial production and natural world are more common Gas-liquid two-phase flow, gas-solid two-phase flow and liquid-solid two-phase flow.The flow above two phases mainly exists in the oil industry, such as oil, gas and water three-phase flow and even oil, gas, The same time there is flow of sand four polyphase flow is a new discipline developed on the basis of fluid mechanics, heat and mass transfer, physical chemistry, combustion and other disciplines, the development of the national economy has a very important role It exists widely in energy, power, nuclear