Bubble breakup in homogeneous shear turbulence

In turbulent multiphase flows, many studies have been conducted to study the breakup of bubble in homogeneous turbulence. However, most types of turbulence used in chemical and biological reactors deviate from the canonical type, featuring strong shear. The specific roles played by shear flow to breakup remain unclear. In this study, we present a novel experimental setup comprising a vertical high-speed water channel capable of generating homogeneous shear turbulence. By matching the Weber numbers defined by turbulent dynamic pressure and mean shear rate, the experiments allow for a direct comparison of their respective effects. From this experimental result, we aim to unravel the interplay between mean shear rate and turbulent eddies, providing valuable insights into the actual processes underlying bubbly flow or oil emulsion produced by turbulence.