The turbulence structure in a rising bubbly flow driven by bubble buoyancy
has been analyzed using the Eulerian-Lagrangian model. ii new method of cal
culating the two-way interaction between the dispersed bubbles and the liqu
id phase was proposed to accurately simulate the local fluctuations of liqu
id flow induced by bubble migration. The present two-dimensional simulation
revealed that, (1) in the case of the larger bubble, the turbulence struct
ure has the longer wavelength in the vertical direction, and, (2) the wave
spectrum of kinetic energy of the liquid phase is sensitive to the average
void fraction and the lift force of the bubbles.