Submerged compressible gas injection into liquid: experimental and numerical investigation of the back-attack phenomenon

Description

Submerged gas injection is widely used in process industries to enhance reaction rates through better mixing in
liquids. A common side effect of massive gas injection is the occasional local backflow of the liquid towards
the nozzle outlet known as ‘back attack’or ‘bubble knocking’. This local backflow occurs randomly and is still
not fully understood. Based on experimental observations and complimentary numerical simulations, this study
presents a physics-based explanation for the back-attack mechanism, and provides new insights for design and
optimization of massive gas injection systems.

Period	15 May 2025
Event title	12th International Conference on Multiphase Flows (ICMF 2025)
Event type	Conference
Location	Toulouse, FranceShow on map
Degree of Recognition	International