Ultrafast Optics presents an incredible opportunity to enhance diagnostic techniques when it comes to multiphase flows. Despite their prevalence, two-phase flows, especially with high-void fractions, are challenging to characterize. Current measurement methods fall short, limiting understanding of fundamental phenomena.
With precise synchronization of two ultrashort laser pulses, the Optical Kerr Effect overcomes conventional electronic limitations, creating exposures close to a trillionth of a second. Using this we can image the first few photons traveling through bubbles, removing the influence of scattering and occlusion. Combining this with our BST and FST facilities, we aim to give new insight into air entrainment dynamics.
Main publications
DA HUNTER, and PM BARDET. Ultra-Fast Optical Imaging of Bubbly Flows, 76th Annual Meeting of the APS Division of Fluid Dynamics, Washington, DC, Nov. 19-21 2023 https://meetings.aps.org/Meeting/DFD23/Session/ZC21.4
G CHAUSSONNET, L MEES, M SORMAZ, P JENNY, and PM BARDET. Modeling multiple scattering transient of an ultrashort laser pulse by spherical particles. arXiv preprint arXiv:2105.05466, https://arxiv.org/abs/2105.05466 (2021).
G CHAUSSONNET and PM BARDET. Scattering of an utlrashort laser pulse by a spherical air bubble. Optics Express. 28(19):27358-27371, https://doi.org/10.1364/OE.401010 (2020).