Abstract Mixing applications operating in the laminar regime are used in numerous industrial processes in the pharmaceutical, chemical, and food industries. The aim of this paper is to introduce a numerical model adapted to solid-liquid mixing situations in stirred tanks. The method presented herein is based on a Euler-Lagrange approach using the CFD-DEM method. This method couples computational fluid dynamics (CFD) for the fluid with the discrete element method (DEM) for the solid particles. We introduce a rotating frame of reference approach, which is the first of its kind for CFD-DEM. In this paper we discuss the main issues related to the modeling of complex rotating impeller geometries, we explain the various issues involved in conducting a CFD-DEM simulation in a non-inertial frame, we compare our model with experimental results obtained with a pitched blade turbine and, lastly, we use our model to study solid-liquid mixing with a double helical ribbon.

中文翻译：

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使用非惯性参考系对搅拌罐中的固液流动进行 CFD-DEM 模拟

摘要 在层流状态下运行的混合应用被用于制药、化学和食品行业的众多工业过程中。本文的目的是介绍一种适用于搅拌罐中固液混合情况的数值模型。此处介绍的方法基于使用 CFD-DEM 方法的 Euler-Lagrange 方法。该方法将流体的计算流体动力学 (CFD) 与固体颗粒的离散元方法 (DEM) 相结合。我们引入了旋转参考系方法，这是 CFD-DEM 中的首创。在本文中，我们讨论了与复杂旋转叶轮几何形状建模相关的主要问题，我们解释了在非惯性框架中进行 CFD-DEM 模拟所涉及的各种问题，