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流固两相流的稀疏离散相模型研究进展

发布时间:2019-01-09 14:58
【摘要】:流固两相流中稀疏离散相广泛存在于化工、储运、分离等工程实际应用中,其复杂的湍流运动规律的描述是目前两相流研究的热点和难点之一。对流固两相流中稀疏离散相模型的发展历程进行了综述和分析,从离散相轨道模型的理论依据、建模过程、数值模拟方法以及应用情况等几个方面详细地分析了离散相既定轨道模型、随机轨道模型、改进随机轨道模型等模型,并针对离散相和连续相间的相互耦合关系进行了阐述,进而对相应的模型进行了评价;并指出离散相轨道模型目前存在的问题和今后发展的方向,对连续相脉动速度进行随机处理提出基于随机Fourier级数描述离散相合力的改进随机轨道模型,从而较好地描述离散相的运动规律,同时结合考虑两相耦合的方法建立两相流的全耦合振动动力学模型,可全面、系统地描述流固两相流中稀疏离散相的运动特征,为流固两相流中稀疏离散相模型的深入发展提供前期基础。
[Abstract]:The sparse discrete phase in fluid-solid two-phase flow is widely used in chemical engineering, storage and transportation, separation and other engineering applications. The description of complex turbulent motion law is one of the hot and difficult points in the research of two-phase flow. The development of sparse discrete phase model in convection-solid two-phase flow is summarized and analyzed. The numerical simulation method and its application are analyzed in detail, such as discrete phase established orbit model, random orbit model, improved stochastic orbit model and so on, and the coupling relationship between discrete phase and continuous phase is expounded. Then the corresponding model is evaluated. The problems existing in the discrete phase orbit model and the future development direction are pointed out. An improved stochastic orbit model based on stochastic Fourier series to describe the discrete phase force is proposed for the stochastic treatment of the continuous phase pulsation velocity. Thus, the motion law of discrete phase can be described well, and the fully coupled vibration dynamic model of two-phase flow can be established by considering two-phase coupling method. The motion characteristics of sparse discrete phase in fluid-solid two-phase flow can be described comprehensively and systematically. It provides the foundation for the further development of sparse discrete phase model in fluid-solid two-phase flow.
【作者单位】: 重庆工商大学废油资源化技术与装备工程研究中心;
【分类号】:TQ018;;TQ028.4


本文编号:2405775


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