Conservation equations by mixture model. Studies on three-phase gas-liquid-solid flow in a vertical pipe.
Conservation equations by mixture model. Studies on three-phase gas-liquid-solid flow in a vertical pipe.
复制标题
混合模型守恒方程。
DOI：
10.2473/shigentosozai.107.23
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
T. Masuyama
中科院分区：
文献类型：
--
作者：
N. Hatakeyama;T. Masuyama
在输送固体物料的气升泵、煤液化装置等中，都观察到了管内气-液-固三相流动现象。在分析或数值模拟三相流现象时，需要一组描述三相介质的质量、动量和能量守恒的基本方程，本文的目的是建立三相流的基本方程，以便于实际应用。在忽略界面力和界面能的情况下，对混合物模型进行了方程的推导。首先，利用分布平均值中各相的特征函数，将三相流的物理量定义为场量，进而推导出质量、动量和能量的局部瞬时和平均守恒方程。其次，在局部平均方程的基础上，考虑了物理量的径向分布，采用漂移通量模型建立了一维基本方程。
Three-phase gas-liquid-solid flow phenomena in pipes are observed in air-lift pumps for transporting solid materials, coal liquefaction plants, and so forth. In analyzing or numerically simulating three-phase flow phenomena, one needs a set of basic equations which describe the conservations of mass, momentum and energy for three-phase media.The purpose of this paper is a formulation of the basic equations in three-phase flow for practical applications. The derivation of the equations was carried out for the mixture model in neglecting the interfacial force and energy. First, using a characteristic function of each phase in the mean of distribution, the physical parameters of three-phase flow were defined as field quantities, and then the local instantaneous and averaged conservation equations of mass, momentum and energy were derived. Secondly, taking radial distribution of the physical parameters into account, one-dimensional basic equations were represented by means of the drift flux model on the basis of the local averaged equations.