TY - JOUR
T1 - Scanning stereo-PLIF method for free surface measurements in large 3D domains
AU - van Meerkerk, Mike
AU - Poelma, C.
AU - Westerweel, J.
PY - 2020
Y1 - 2020
N2 - 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.].
AB - 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.].
UR - http://www.scopus.com/inward/record.url?scp=85077499580&partnerID=8YFLogxK
U2 - 10.1007/s00348-019-2846-7
DO - 10.1007/s00348-019-2846-7
M3 - Article
AN - SCOPUS:85077499580
VL - 61
JO - Experiments in Fluids: experimental methods and their applications to fluid flow
JF - Experiments in Fluids: experimental methods and their applications to fluid flow
SN - 0723-4864
IS - 1
M1 - 19
ER -