Experimental and numerical investigation of turbulent multiphase jets

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 twophase 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.