Emergence of Capillary Waves in Miscible Coflowing Fluids
We show that capillary waves can exist at the boundary between miscible coflowing fluids. We unveil that the interplay between transient interfacial stresses and confinement drives the progressive transition from the well-known inertial regime, characterized by a frequency independent wave number, k∼ω^{0}, to a capillary wave scaling, k∼ω^{2/3}, unexpected for miscible fluids. This allows us to measure the effective interfacial tension between miscible fluids and its rapid decay on timescales never probed so far, which we rationalize with a model going beyond square-gradient theories. Our work potentially opens a new avenue to measure transient interfacial tensions at the millisecond scale in a controlled manner.
Authors
- Alessandro Carbonaro (ORCID: https://orcid.org/0000-0001-7561-4750)
- Rama Govindarajan (ORCID: https://orcid.org/0009-0007-4794-4964)
- Giovanni Savorana (ORCID: https://orcid.org/0000-0002-1082-5642)
- Luca Cipelletti (ORCID: https://orcid.org/0000-0003-2956-7580)
- Domenico Truzzolillo (ORCID: https://orcid.org/0000-0002-1841-969X)
Institutions
- Tata Institute of Fundamental Research (IN)
- Institut Universitaire de France (FR)
- International Centre for Theoretical Sciences (IN)
- Laboratoire Charles Coulomb (FR)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2025-02-04
- DOI
- https://doi.org/10.1103/physrevlett.134.054001
- Citations
- 4
- Primary Topic
- Fluid Dynamics and Mixing
- Type
- article
- Field-Weighted Citation Impact
- 2.70
Funders
- Department of Atomic Energy, Government of India
- Centre National d’Etudes Spatiales
- Institut Universitaire de France