Abstract
The bubbly flow around a square-section cylinder is simulated by the vortex method proposed by the authors in a prior study. The cylinder is located in vertical upward bubbly flow. The Reynolds number based on the width of the cylinder and the water volumetric velocity is 15000. Air bubbles with diameter 1mm are loaded uniformly upstream of the cylinder, and the volumetric fraction α_<g0> ranges from 0 to 0.02. The air volumetric fraction is higher in the wake of the cylinder and reaches its maximum value at the center of the vortices. The vortex shedding frequency, the pressure distribution on the cylinder and the pressure difference between the front and back stagnation points of the cylinder change as function of ago in accordance with the experimental results.
