Move With The Flow To Track The Evolving Turbulent/Non-Turbulent Interface
Ali Rahimi Khojasteh (TU Delft - Fluid Mechanics)
Coen Been (Student TU Delft)
Lyke Van Dalen (TU Delft - Fluid Mechanics)
Willem van De Water (TU Delft - Fluid Mechanics)
Jerry Westerweel (TU Delft - Fluid Mechanics)
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Abstract
This study investigates the turbulent/non-turbulent interface (TNTI) in self-similar turbulent axisymmetric jet flows, focusing on a novel approach named ’move with the flow’ where the image acquisition is space-based rather than time-based. Experiments were conducted at three different Reynolds numbers (9000, 12000, and 31000), utilizing particle image velocimetry (PIV) and laser-induced fluorescence (LIF) techniques. The core of this research was developing a traverse system specifically designed to follow the evolving flow structures at the TNTI synchronously. We succeeded in tracking large-scale events in TNTI from creation to dissolution.