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URV

Paolo Sassi Arobba


PhD Programme

Nanoscience, Materials and Chemical Engineering

Research group

ECOMMFIT - Experimentació, Computació i Modelització en Mecànica de Fluids i Turbulència

Supervisors

Jordi Pallarès Curto & Yousef Striba

Bio

Paolo Sassi graduated in Mechanical Engineering in 2014 at Universidad de la Republica (UdelaR) in Montevideo, Uruguay. In 2012, he joined the computational fluid dynamics group from the Institute of Fluid Mechanics and Environmental Engineering at UdelaR. There he participated in several projects related to renewable energies, mostly about interaction between fluids and flexible structures, as well as taking part in the teaching of fluid dynamics curses. After his bachelor degree, he started his Master's studies in Energy Engineering at UdelaR, where his thesis, entitled “Simulation of Vorticity Wind Turbines”, adapted numerical methods to represent the bi-directional interaction between the wind flow and flexible structures, applying it to vorticity wind turbines. For this thesis, Paolo has received the best Thesis award in the energy field in Uruguay in 2017.

Project: Simulation, visualization and measurement of three phase flows in pipelines

This thesis analyses three-phase flows, where the gas, liquid and solid phases coexist in pipelines and accessories. The dynamics of three-phase flows involves phenomena of high complexity whose characterization is of great interest for diverse sectors of the worldwide industry. In the petroleum industry, from the production stages of oil and gas through the different phases of refinement up to the production of petroleum products, for biomass transport, in chemical reactors, nuclear waste decommissioning, pulp and paper production, in many applications of air injections, among many others. In order to move forward in the fundamental knowledge of the behaviour of three-phase flows, a new experimental rig will be designed and constructed to visualize and measure every parameter. These are 1) the distribution and flow rates of the individual phases, 2) the superficial velocities, 3) the frictional pressure loss, and 4) the hold up (or void fraction). The experimental data will be used to develop and tune a computational model able to predict the pressure progression, the void fraction and velocity of the phases along the pipeline axial direction. For the computational simulations the software FLUENT will be used. The inlet boundary conditions will be determined by measuring the velocities and phase fractions in a cross sectional plane in the pipeline and the evolution along the pipeline will be monitored and compared.