Turbulent modifications in a bubble-laden wall-bounded flow with topological changes

Abstract: Turbulent dispersed bubbly flows are ubiquitous. From air bubbles in the surface of oceans to bubble-columns used in industry and pipes networks with entrapped air in the water supply of our cities. In this talk, we focus on dispersed bubbly flows delimitated by walls where the bubbles undergo topological changes (breakup and coalescence). We start with a short review on the physical mechanisms potentially involved in the turbulent bubbly flow and make some comments on previous studies. We then present our recent numerical results on bubble-laden vertical channel flow with topological changes. Here, the emphasis is on the turbulence modifications experienced by the carrier. Lastly, we close by highlighting some directions for future work and by briefly commenting on other research being performed in our group at NTNU.

Bio: Arturo is a postdoctoral fellow in the Department of Chemical Engineering (IKP) at NTNU. Arturo did his master studies at KTH before moving to Trondheim to continue with his doctoral research under the advisory of Prof. J. Solsvik at IKP, where he has stayed to date. His research interests include topics such as data-driven methods, wall-bounded turbulence (e.g., turbulence anisotropy, scaling, and coherent structures), non-Newtonian rheology, and multiphase flow phenomena.