THERMOCAPILLARY BUBBLE MIGRATION AT HIGH REYNOLDS AND MARANGONI NUMBERS UNDER LOW GRAVITY - COMMENT

This article proposes that the experimental data associated with Treun er et al. (Treuner, M., Galindo, V., Gerbeth, G., Langbein, D., and Ra th, H, J., J. Colloid Interface Sci, 179, 114 (1996)) indicates that a secondary oscillation may exist for bubble motion due to thermocapill ary effects in a low gravity environment. This oscillation in the velo city appears to have a frequency of about 4 Hz for a 2.0-mm bubble in octane with a temperature gradient of about 0.56 degrees C/mm. (C) 199 7 Academic Press.