Pessac, Nouvelle-Aquitaine, France
The topic of my PhD was to study the mechanical mixing got by vertical oscillations of charged fluids, with the help of simulations. I used a HPC code from the I2M laboratory, named NOTUS CFD, for basis to simulate different configurations following the RAM (Resonant Acoustic Mixing) technology specifications. My thesis has been divided in the following axis : * Determinate which physical mechanism is involved in the vertical vibrational mixing (instabilities like Faraday instability, Rayleigh-Taylor (RT)...). From different publications explaining in which conditions Faraday instability could appear, with linear analysis of Navier-Stokes equations, I could get a first analytical view of the phenomenom we wanted to simulate. Resolution of Mathieu equation as eigenvalue problem to determine which parametric conditions where necessary to get a mixing. * Validation campaign of RT and Faraday instabilty with NOTUS CFD, from data got from articles. * Implementation and validation of Phillips model in NOTUS CFD, to incorporate suspensions in fluids in an eulerian formulation. * Comparison between experimental data made by the industrial partner with my simulations. Three different systems have been chosen : mixing in one fluid, two fluid and one fluid with suspensions. There was not any study before of numerical mixing with suspension in eulerian formulation with Phillips model, and the main goal of the thesis was to achieve a simulation validated with an experiment. Link to my thesis : https://theses.hal.science/tel-03783463v1
Numerical approach of hydrothermal fluid behavior
Simulations of turbomachinery's fan with LBM code ProLB