Turbulent multiphase jets appear in machines used for enhanced flotation processes like the Concorde Cell™ and the REFLUX™ Flotation Cell. Likewise, flows generated in conventional mechanically stirred rotor–stator cells bear strong resemblance to jets. In contrast to their single-phase counterparts however, they have not been extensively studied yet. The present contribution summarizes experimental and numerical methods that are available for this purpose, specifically shadowgraphy on the experimental side and the Eulerian multi-fluid framework for multiphase CFD simulations. Some specific questions that arose from preliminary application of these methods are highlighted which have not been addressed adequately so far. These concern bubbly two-phase jets in the experiments, and simulations of both bubbly and particulate two-phase jets as well a three-phase jets in which both bubble and particles are presented.

中文翻译：

---

湍流多相射流的实验和数值研究

湍流多相射流出现在用于增强浮选过程的机器中，例如 Concorde Cell™ 和 REFLUX™ 浮选室。同样，传统机械搅拌转子-定子单元中产生的流动与射流非常相似。然而，与单相对应物相比，它们尚未得到广泛研究。本贡献总结了可用于此目的的实验和数值方法，特别是实验方面的阴影成像和用于多相 CFD 模拟的欧拉多流体框架。强调了这些方法的初步应用中出现的一些具体问题，但迄今为止尚未得到充分解决。这些涉及实验中的气泡两相射流，以及气泡和颗粒两相射流以及同时存在气泡和颗粒的三相射流的模拟。