Dynamics of gas bubbles in time-variant temperature fields
Journal
Journal of Fluid Mechanics
Journal Volume
663
Pages
209-232
Date Issued
2010
Author(s)
Abstract
The effect of time-variant temperature on the dynamics of a single gas bubble in a liquid is investigated. With changes in temperature, several physical parameters controlling bubble behaviour change including surface tension, diffusivity, vapour pressure and gas solubility. A single-bubble model is formulated and a numerical simulation implemented to model the radius-time profile of a bubble, across a range of initial bubble sizes and rates of heating, taking into account the aforementioned parameter temperature dependences. The model is validated experimentally in a xanthan gum gel phantom, tracking the evolution of the bubbles using digital photography and an image analysis sizing algorithm. It is shown that the natural tendency for a bubble to dissolve can be reversed by an increase in temperature, but only above a certain radius-dependent threshold rate of heating. ? 2010 Cambridge University Press.
Subjects
Bubble behaviour
Bubble dynamics
Bubble models
Bubble size
Diffusivities
Digital photography
Gas bubble
Gas solubility
Gel phantom
Numerical simulation
Physical parameters
Sizing algorithms
Temperature dependence
Temperature field
Time variant
Vapour pressures
Xanthan Gum
Behavioral research
Computer simulation
Heating
Surface tension
Tracking (position)
Dynamics
algorithm
bubble
fluid dynamics
gas
numerical model
simulation
temperature gradient
SDGs
Type
journal article