Reassessment on the Operation of a T-mixer Chemical Reactor in the Cavitation Regime

Fatma Ben Baha Spiridigliozzi (1) , Noel Girodon (1) , Nicolas Fagnon (1) , Andrei Kanaev (1) , Mounir Ben Amar (1) , Jean-Philipe Passarello (1)

1 LSPM - Laboratoire des Sciences des Procédés et des Matériaux

In a previous work in our team (Oualha et al., Chem Eng Trans, vol 73, 67-72 (2019)) it was shown that at large Reynold numbers (Re > 8000) a vapor phase appears by cavitation in T-mixer reactors used for chemical precipitation of nanoparticles. This phenomenon can affect dramatically the properties of the obtained nanoparticles. In the work of Oualha et al (2019), the apparent size (more precisely the hydrodynamic diameters) of vapor bubbles due to the cavitation, was in situ monitored in the reactor by using SLS (Static Light Scattering) and DLS (Dynamic Light Scattering) methods. A modeling was also given using Fluent software: calculated size population of bubble was provided. Unfortunately this population could not be directly compared to experimental data since the relationship between apparent and real size was unknown. In the present work, new DLS measurements using particles of calibrated sizes are presented to help us to interpret and comment our previous results on bubbles size distribution. They were obtained using a new apparatus designed and realized for the purpose of defining a method of true diameters measurement.

Mots clés: T-mixer; Cavitation; Light scattering (DLS/SLS)

Domaines: Génie des procédés

Fatma Ben Baha Spiridigliozzi, Noel Girodon, Nicolas Fagnon, Andrei Kanaev, Mounir Ben Amar, et al.. Reassessment on the Operation of a T-mixer Chemical Reactor in the Cavitation Regime. Chemical Engineering Transactions, 2021, ⟨10.3303/CET2184015⟩. ⟨hal-03412161⟩