Print Email Facebook Twitter Scanning stereo-PLIF method for free surface measurements in large 3D domains Title Scanning stereo-PLIF method for free surface measurements in large 3D domains Author van Meerkerk, M. (TU Delft Multi Phase Systems) Poelma, C. (TU Delft Multi Phase Systems) Westerweel, J. (TU Delft Fluid Mechanics) Date 2020 Abstract In this work, we extend a planar laser-induced fluorescence method for free surface measurements to a three-dimensional domain using a stereo-camera system, a scanning light sheet, and a modified self-calibration procedure. The stereo-camera set-up enables a versatile measurement domain with self-calibration, improved accuracy, and redundancy (e.g., possibility to overcome occlusions). Fluid properties are not significantly altered by the fluorescent dye, which results in a non-intrusive measurement technique. The technique is validated by determining the free surface of a hydraulic flow over an obstacle and circular waves generated after droplet impact. Free surface waves can be accurately determined over a height of L= 100 mm in a large two-dimensional domain (y(x, z) = 120 × 62 mm2), with sufficient accuracy to determine small amplitude variations (η≈ 0.2 mm). The temporal resolution (Δt= 19 ms) is only limited by the available scanning equipment (f= 1 kHz rate). For other applications, this domain can be scaled as needed. Graphic abstract: [Figure not available: see fulltext.]. To reference this document use: http://resolver.tudelft.nl/uuid:d03a72b6-9c2b-40b0-83a5-1f35e20d4ea7 DOI https://doi.org/10.1007/s00348-019-2846-7 ISSN 0723-4864 Source Experiments in Fluids: experimental methods and their applications to fluid flow, 61 (1) Part of collection Institutional Repository Document type journal article Rights © 2020 M. van Meerkerk, C. Poelma, J. Westerweel Files PDF Meerkerk2020_Article_Scan ... dForFr.pdf 6.28 MB Close viewer /islandora/object/uuid:d03a72b6-9c2b-40b0-83a5-1f35e20d4ea7/datastream/OBJ/view