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首页> 外文会议>International conference on computational and experimental methods in multiphase and complex flow >Computational modelling of gas-liquid multiphase flows with DQMOM and the N-phase Algebraic Slip Model
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Computational modelling of gas-liquid multiphase flows with DQMOM and the N-phase Algebraic Slip Model

机译：DQMOM和N相代数滑动模型对气液多相流的计算建模

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In the present work the Direct Quadrature Method of Moments (DQMOM) has been implemented into the CFD code TransAT. The TransAT code is a finite volume solver, based on structured multiblock grids, with a focus on multiphase flow modelling: including two-phase interface tracking, Lagrangian particle tracking and multiphase mixtures with an algebraic slip model generalized for an arbitrary number of phases (N-phase ASM). The DQMOM technique was combined with the turbulent N-phase ASM model in order to extend its ability to handle dispersed phase populations with each class having its own velocity field. In the scope of this work the DQMOM implementation has been validated by performing OD, 1D and 2D test cases - from unit tests to very complex problems such as bubble columns. The drag force acting on the bubble population, turbulent dispersion, bubble aggregation, breakage and growth phenomena were considered. The results show that DQMOM is an efficient method for solving complex multiphase problems, and allows more sophisticated modelling than ASM. However attention should be paid to proper implementation into a CFD framework, especially when it comes to mass conservation, readability of DQMOM abscissas and discretization of stiff particle interaction kernels.
机译：在当前工作中，矩量的直接正交方法（DQMOM）已实现到CFD代码TransAT中。 TransAT代码是基于结构化多块网格的有限体积求解器，重点是多相流建模：包括两相界面跟踪，拉格朗日粒子跟踪和多相混合物，以及针对任意数量的相（N相ASM）。 DQMOM技术与湍流N相ASM模型相结合，以扩展其处理各相具有各自速度场的分散相种群的能力。在这项工作的范围内，DQMOM实施已通过执行OD，1D和2D测试用例进行了验证-从单元测试到非常复杂的问题（例如气泡塔）。考虑了作用在气泡上的阻力，湍流扩散，气泡聚集，破裂和生长现象。结果表明，DQMOM是解决复杂的多相问题的有效方法，并且比ASM允许更复杂的建模。但是，应注意在CFD框架中的正确实现，尤其是在质量守恒，DQMOM横坐标的可读性以及刚性粒子相互作用核的离散化方面。

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