Abstract
An experimental method is proposed to study dispersed two-phase flows at an airwater interface, a family of flows of practical significance in environmental and industrial seĴings. The applicability of this technique is demonstrated through the study of a lightly-deformed turbulent free-surface laden with floating particles (`floaters'). A low-mean turbulent flow is generated in a turbulence box actuated by a 10×10 synthetic jet array. Using LEDs and a single camera, free-surface flow measurements are carried out by Particle Image Velocimetry (PIV) simultaneously with Lagrangian tracking of the floaters, allowing the potential to characterise the coupling between the floater dynamics and the (sub)surface flow. Discrimination of the dispersed and continuous phases is carried out based on size. Individual floaters and clusters of floaters are successfully tracked throughout the field of view while they navigate through elongated and circular regions of high and low vorticity, characteristic features typically observed when a subsurface turbulent flow interacts with a free surface. Preliminary results of the floater-fluid interactions are presented to highlight the potential of this technique to beĴer our understanding of floaterladen turbulent free surfaces.
Original language | English |
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Title of host publication | Proceedings of the 21st International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics |
Publisher | LISBON Simposia |
Number of pages | 14 |
ISBN (Print) | 978-989-53637-1-1 |
DOIs | |
Publication status | Published - 2024 |
Event | 21st International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics - Lisbon, Portugal Duration: 8 Jul 2024 → 11 Jul 2024 |
Conference
Conference | 21st International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics |
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Country/Territory | Portugal |
City | Lisbon |
Period | 8/07/24 → 11/07/24 |
Keywords
- Turbulence
- Multiphase flows
- Free-surface
- PIV
- PTV