Vectrino Profiler Spatial Filtering for Shear Flows Based on the Mean Velocity Gradient Equation
Publication: Journal of Hydraulic Engineering
Volume 144, Issue 7
Abstract
A new methodology is proposed to spatially filter acoustic Doppler velocimetry data from a Vectrino profiler based on the differential mean velocity equation. Lower and upper bounds are formulated in terms of physically based flow constraints. Practical implementation is discussed, and its application is tested against data gathered from an open-channel flow over a stepped macroroughness surface. The method has proven to detect outliers occurring all over the distance range sampled by the Vectrino profiler and has shown to remain applicable out of the region of validity of the velocity gradient equation. Finally, a statistical analysis suggests that physically obtained bounds are asymptotically representative.
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Acknowledgments
The presented work was part of the research project waveSTEPS, which is funded by the German Federal Ministry of Education and Research (BMBF, Project No. 03KIS119).
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©2018 American Society of Civil Engineers.
History
Received: Jul 28, 2017
Accepted: Jan 25, 2018
Published online: Apr 30, 2018
Published in print: Jul 1, 2018
Discussion open until: Sep 30, 2018
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