07 Juillet – Thesis defense - Quentin Thomas
10 h Amphi B - building A29 (University of Bordeaux / Talence campus)
Numerical modeling of acoustic mixing of energetic charged fluids.
Mixing by vertical vibrations is a growing subject of study thanks to the development of a mechanism by mechanical resonance allowing the mixing of viscous fluids and powders, called RAM (Resonant Acoustic Mixing), and involving Faraday instability. . This thesis is part of the analysis of vibrational mixing by studying the behavior of a two-phase medium, a single-phase fluid containing a concentration of species or a suspension, subjected to this instability. Using numerical simulations carried out with the NOTUS code, developed in the I2M laboratory, comparisons are made between these results and those obtained from the linear analysis of the Faraday instability, as well as experimental data provided by the company Roxel which supports this project. A model allowing to calculate the evolution of the volume fraction during the mixing is implemented in the code in order to be able to simulate the behavior of a loaded fluid subjected to the vibrations imposed by the RAM mixer.