Author(s): Da LIU; Khaldoon ALOBAIDI; Manousos VALYRAKIS

Linked Author(s): Da Liu

Keywords: acoustic Doppler velocimetry profilers; flow velocity; shear stress; turbulent kinetic energy; turbulence

Abstract:

Acoustic Doppler velocimetry profilers (ADVPs) are widely used in both experimental and field studies because of their robustness in velocity measurements. The acquired measurements offer estimates of the instantaneous flow velocity at the interrogated measurement volume and can also be further processed for the estimation of the bed surface shear stresses and turbulent kinetic energy, thus finding a wide range of applications ranging from water engineering to geomorphology and eco-hydraulics. This study aims to evaluate the performance of an ADVP in obtaining hydrodynamics measurements under fixed flow conditions, with various probe configurations. Different assessment criteria are used for the evaluation including qualitative observations as well as quantitative error metrics to assess the uncertainties in the estimation of shear stresses using log Law of the Wall and turbulent kinetic energy due to the probe configuration settings. The methodology implemented herein, for a given flow, and the suggestions presented represent a generalized hierarchical framework which can find use from practitioners and researchers alike.

DOI: https://doi.org/10.25171/InstGeoph_PAS_Publs-2021-026

Year: 2021