Abstract
Sudden rearrangement of the tightly packed bubbles in a foam can be induced by application of shear and by diffusion of gas from smaller to larger bubbles. Using diffusing-wave spectroscopy, we measure dynamics at times that are short in comparison with the rate of these events, where the relative bubble configurations are fixed. We find a distinctly nonexponential contribution to the autocorrelation function that spans several decades in delay time prior to the full decay caused by rearrangements. The short-time dynamics are independent of changes in the rearrangement rate brought about by alteration of the coarsening rate or by application of shear and are therefore attributed to thermal fluctuations of the bubbles. The magnitude of these microscopic fluctuations can be understood in terms of the macroscopic shear modulus.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
