In this paper, the rising of a single bubble and coalescence of two co-axial gas bubbles in a viscous liquid are simulated using a transient 2D/axisymmetric model. To predict the shape of the bubble deformation, Navier-Stokes ...

In this paper, the flow instabilities during the rise of a single bubble in a narrow vertical tube

are studied using a transient 2D/axisymmetric model. These instabilities include the oscillation of the

bubble ...