Conference proceeding
On the Anisotropic Characters of Turbulent Free-Surface Wake Flows of Surface Piercing Bluff Body
AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2026
2026
DOI: 10.2514/6.2026-2344
Abstract
Turbulent wake flows of surface-piercing body near unsteady free surfaces critically affect a wide range of engineering applications. This study presents experimental investigations of anisotropic turbulent wake flows within a three-dimensional volume. A two-dimensional slender surface-piercing wedge with a width-to-length ratio of 1:7 was employed to generate wake flows across a range of Reynolds and Froude numbers. In addition to qualitative fluorescent dye visualization, the state-of-the-art flow diagnostic techniques, including time-resolved planar Particle Image Velocimetry (PIV) and volumetric defocusing PIV, were employed to characterize the spatio-temporal an-isotropic dynamics of the wake flows. The presented results depict the strong Froude number dependency of the near-surface wake flow, resulting in reduced coherency and extended re-circulation zone. At high Froude number, the turbulent fluctuations and Reynolds shear stress are suppressed near the free surface, indicating stabilized wake flow. The underlying flow of physics of the presented results is discussed.
Details
- Title: Subtitle
- On the Anisotropic Characters of Turbulent Free-Surface Wake Flows of Surface Piercing Bluff Body
- Creators
- Cong Wang - University of IowaDavid Butler - University of IowaSkinder Ali Dar - University of IowaChukwudum Eluchie - University of IowaMinh Nguyen - University of IowaStella Gerlock - University of IowaDavid Jeon - Autonomous Undersea Systems InstituteMorteza Gharib - Autonomous Undersea Systems Institute
- Resource Type
- Conference proceeding
- Publication Details
- AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2026
- DOI
- 10.2514/6.2026-2344
- Grant note
- Deutsches Zentrum für Luft- und Raumfahrt (http://data.elsevier.com/vocabulary/SciValFunders/501100002946) Office of Naval Research (http://data.elsevier.com/vocabulary/SciValFunders/100000006) Office of Naval Research (100000006) N00014-22-1-2233 / Office of Naval Research (http://data.elsevier.com/vocabulary/SciValFunders/100000006)
- Language
- English
- Date published
- 2026
- Academic Unit
- IIHR--Hydroscience and Engineering; Mechanical Engineering
- Record Identifier
- 9985141902702771
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