In June 2026, Nicolò Varallo served as an Invited Lecturer at the Okinawa Institute of Science and Technology (OIST), upon invitation from Prof. Marco Edoardo Rosti of the Complex Fluids and Flows Unit. Nicolò Varallo delivered 20 hours of teaching within the PhD course (1 CFU) “Hands-On CFD Modelling: Mesh, Solve, and Analyze Complex Flows in ANSYS Fluent.”
The course provided an introduction to applied Computational Fluid Dynamics (CFD) for the modelling of complex engineering flows. Through a combination of theoretical lectures and hands-on sessions, Nicolò Varallo guided students through the complete numerical simulation workflow, from mesh generation and case setup to solution and post-processing. Particular attention was devoted to high-quality 2D and 3D mesh generation, the definition of appropriate numerical models and boundary conditions, and the analysis and validation of numerical results against experimental data.
As part of the teaching activities at OIST, Nicolò Varallo also delivered the seminar “Experimental and Numerical Characterization of Multiphase Flows for CO₂ Capture in Bubble Columns: From Local Dynamics to Global Flow Behaviour” on June 10, 2026.
During the seminar, Nicolò Varallo presented research on the experimental and numerical investigation of gas–liquid flows for CO₂ capture, adopting a multiscale perspective that connects phenomena occurring at the bubble scale with the overall fluid dynamics of bubble columns. The presentation addressed bubble shape and rising velocity, bubble size distribution and coalescence, as well as reactor-scale flow regimes and their transitions.
Particular attention was also devoted to the use of ionic liquids for CO₂ absorption and to how their physicochemical properties can influence bubble dynamics and mass-transfer processes. Overall, the seminar highlighted the importance of linking local bubble-scale dynamics and large-scale fluid behaviour to improve the understanding and modelling of gas–liquid systems relevant to CO₂ capture technologies.