Anomalous relaxation of coarsening foams with viscoelastic continuous phases
- Author(s)
- Chiara Guidolin, Emmanuelle Rio, Roberto Cerbino, Anniina Salonen, Fabio Giavazzi
- Abstract
We investigate the ultraslow structural relaxation of ageing foams with rheologically tunable continuous phases. We probe the bubble dynamics associated with pressure-driven foam coarsening using differential dynamic microscopy, which allows characterising the sample dynamics in reciprocal space with imaging experiments. Similar to other out-of-equilibrium jammed soft systems, these foams exhibit compressed exponential relaxations, with a ballistic-like linear dependency of the relaxation rate on the scattering wavevector. By tuning the rheology of the continuous phase, we observe changes in the relaxation shape, where stiffer matrices yield larger compression exponents. Our results corroborate recent real-space observations obtained using bubble tracking, providing a comprehensive overview of structural relaxation in these complex systems, both in direct and reciprocal space.
- Organisation(s)
- Computational and Soft Matter Physics
- External organisation(s)
- Università degli Studi di Milano-Bicocca, Université Paris Saclay
- Journal
- Soft Matter
- Volume
- 20
- Pages
- 7021-7029
- No. of pages
- 9
- ISSN
- 1744-683X
- DOI
- https://doi.org/10.1039/D4SM00588K
- Publication date
- 2024
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103015 Condensed matter, 103045 Light optical microscopy, 103018 Materials physics
- Keywords
- ASJC Scopus subject areas
- Condensed Matter Physics, Chemistry(all)
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/anomalous-relaxation-of-coarsening-foams-with-viscoelastic-continuous-phases(191c28b9-3f3c-4373-a9f5-decef42ae4bf).html