Self-sustained oscillations in a low-viscosity round jet
When a jet of fluid emerges into an ambient medium of the same density but higher viscosity, the dominant mode of instability transitions from axisymmetric at low viscosity ratio M to a helical mode at high M. It is shown that these helical modes are unstable global modes associated with enhanced mixing and the emergence of a single dominant frequency observed everywhere in the near field. These frequencies align well with predictions of absolute instability from spatiotemporal linear stability theory.
Authors
- I. P. Wright (ORCID: https://orcid.org/0000-0002-4267-7963)
- Judy Q. Yang (ORCID: https://orcid.org/0000-0001-6272-1266)
- Akash Dhotre (ORCID: https://orcid.org/0009-0001-3201-2669)
- V. Srinivasan (ORCID: https://orcid.org/0000-0003-2509-4819)
- E. Whitely (ORCID: https://orcid.org/0000-0002-9927-5404)
- X. Tan
Institutions
- University of Minnesota (US)
- University of Minnesota System (US)
Publication Details
- Journal
- Physical Review Fluids
- Published
- 2024-08-12
- DOI
- https://doi.org/10.1103/physrevfluids.9.083902
- Primary Topic
- Fluid Dynamics and Turbulent Flows
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Science Foundation