Journal article
Unsteady free-surface wave-induced separation: analysis of turbulent structures using detached eddy simulation and single-phase level set
Journal of turbulence, Vol.8, N44
01/01/2007
DOI: 10.1080/14685240701537891
Abstract
Turbulent structures of the unsteady free-surface wave-induced separation around a surface-piercing NACA0024 are studied using a detached-eddy simulation with a single-phase level set method. Quantitative verification and validation show good agreement with experimental data. Instantaneous and mean flows show an owl-type separation with the same instability frequencies identified by unsteady Reynolds-averaged Navier-Stokes. Anisotropy invariant maps show that turbulence is anisotropic in the middle of the separation region and is at a two-component state near the foil surface. The turbulent kinetic energy and its budget have similarities to that of a separated turbulent boundary layer near the toe and a backward-facing step flow in the recirculation region, but with large three-dimensional and free-surface effects. The free-surface damps velocity and pressure fluctuations and moves the peaks of turbulence quantities from the high-speed to the low-speed side of the free shear layer.
Details
- Title: Subtitle
- Unsteady free-surface wave-induced separation: analysis of turbulent structures using detached eddy simulation and single-phase level set
- Creators
- Tao Xing - IIHR-Hydroscience & Engineering, C Maxwell Stanley Hydraulics Laboratory , The University of IowaMani Kandasamy - IIHR-Hydroscience & Engineering, C Maxwell Stanley Hydraulics Laboratory , The University of IowaFrederick Stern - IIHR-Hydroscience & Engineering, C Maxwell Stanley Hydraulics Laboratory , The University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of turbulence, Vol.8, N44
- Publisher
- Taylor & Francis Group
- DOI
- 10.1080/14685240701537891
- ISSN
- 1468-5248
- eISSN
- 1468-5248
- Language
- English
- Date published
- 01/01/2007
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984064584102771
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