Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4995038 | International Journal of Multiphase Flow | 2017 | 28 Pages |
Abstract
We present a marginal stability curve of a deformable bubble ascending freely in a viscous Newtonian liquid. The bubble is considered in the limit of zero gas/liquid density and viscosity ratio as an incompressible void of deformable shape. The marginal stability curve is given in the two-parameter plane of the Galileo number Ga=gd3/ν and of the Bond number Bo=Ïgd2/Ï where g denotes the gravitational acceleration, d the diameter of the undeformed spherical bubble and ν, Ï and Ï are, respectively, the kinematic viscosity, the density and surface tension of the liquid. The numerical investigation covers more than two decades of Bond number going from 0.1 to 20. The results clearly show the crucial role of the surface deformation in the loss of stability of the steady axisymmetric flow.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
W. Zhou, J. Dušek,