Abstract
The video-capabilities of smartphones are rapidly improving both in pixel resolution and frame-rates. Herein we use four smartphones in the “slow-mo” option to perform time-resolved Tomographic Particle Shadow Velocimetry of a vortex ring, using 960 fps. We use background LED-illuminated diffusers, facing each camera, for shadow particle imaging. We discuss in-depth the challenges present in synchronizing the high-speed video capture on the smartphones and steps to overcome these challenges. The resulting 3-D velocity field is compared to an instantaneous, concurrent, high-resolution snapshot with four 4k-video cameras using dual-color to encode two time-steps on a single frame. This proof-of-concept demonstration, supports realistic low-cost alternatives to conventional 3-D experimental systems.
Original language | English (US) |
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Pages (from-to) | 1-18 |
Number of pages | 18 |
Journal | Applied Sciences (Switzerland) |
Volume | 10 |
Issue number | 20 |
DOIs | |
State | Published - Oct 13 2020 |
Bibliographical note
KAUST Repository Item: Exported on 2020-10-29Acknowledged KAUST grant number(s): URF/1/2981-01-01
Acknowledgements: This study was supported by King Abdullah University of Science and Technology (KAUST) under Grant No. URF/1/2981-01-01.