We study the effect of bubble breakup and coalescence on fine-scale dynamics of bubbly
turbulent flows using direct numerical simulations. We perform two different simulations of
dilute bubbly flows of void fraction 0.5%: one with bubbles breaking up and coalescing and
the other without these physical processes. The volume of the fluid method is used for
simulating bubbles undergoing breakup and coalescence while the bubbles are treated as
rigid spheres in the immersed boundary method simulation. The energy spectrum in both …