MICHAEL MANGA: Recent Refereed Publications
Manga, M. and H.A. Stone (1994) Interactions between bubbles in magmas
and lavas: Effects of deformation, Journal of Volcanology and
Geothermal Research, vol. 63, 269-281.
The interactions between two deformable bubbles are studied in
order to determine the effects of deformation on bubble dynamics
and to determine the limits in which the effects of deformation can be ignored.
due to hydrodynamic interactions
with other bubbles leads to alignment of horizontally offset
bubbles and thus an enhanced rate of coalescence.
Bubble alignment may produce
spatial inhomogeneities in bubble concentrations
which implies temporal variations in the
concentration and size of bubbles in erupting magmas
and spatial variations in solidified lavas.
An approximate quantitative model for the rate of coalescence of deformable
bubbles is developed based on a series of experiments.
The effects of deformation can be ignored if the largest
bubbles have radii less than about 5 mm in silicate magmas.
Return to Michael's home page
Back to list of publications