Abstract Aerated stirred tanks are frequently used equipment in industries ranging from chemical engineering and biotechnology to minerals processing. In principle, CFD simulation of such equipment on industrial scales is feasible within the Euler-Euler framework of interpenetrating continua. Practical application, however, requires suitable closure models to account for phenomena on the scale of individual bubbles, which are not resolved in this approach. The present work applies a set of closure relations that was previously used with good success to describe bubbly flows in pipes and bubble columns. It turns out that model extensions are needed concerning turbulence and the drag force. To validate the model a comprehensive set of experimental data including gas fraction as well as liquid velocity and turbulence has been assembled from different literature sources. The finally proposed extended model compares reasonably well with this dataset.

中文翻译：

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搅拌罐中的气泡流：Euler-Euler / RANS 建模

摘要 曝气搅拌罐是化工、生物技术、矿物加工等行业中常用的设备。原则上，在互穿连续体的 Euler-Euler 框架内，此类设备在工业规模上的 CFD 模拟是可行的。然而，实际应用需要合适的闭合模型来解释单个气泡规模的现象，而这种方法无法解决这些问题。目前的工作应用了一组封闭关系，之前使用这些关系非常成功地描述了管道和气泡柱中的气泡流。事实证明，需要对湍流和阻力进行模型扩展。为了验证模型，从不同的文献来源收集了一组全面的实验数据，包括气体分数以及液体速度和湍流。最终提出的扩展模型与该数据集相当不错。