Turbulent Events around an Intermediately Submerged Boulder under Wake Interference Flow Regime
- 1 July 2021
- journal article
- research article
- Published by American Society of Civil Engineers (ASCE) in Journal of Hydraulic Engineering
- Vol. 147 (7), 06021005
- https://doi.org/10.1061/(asce)hy.1943-7900.0001892
Abstract
In-stream boulders significantly affect local flow hydrodynamics, sediment transport, and aquatic habitats. This study experimentally investigates the Reynolds shear stress (RSS) profiles and turbulent events around an intermediately submerged boulder under a wake interference flow regime. The frequency of turbulent events and their contribution to the RSS are quantified at two specific submergence ratios of 1.56 and 1.90 around the boulder in the near-bed and top-boulder regions. Ejection and sweep events were generally dominant in the near-bed and top-boulder regions. The dominance of turbulent events around the boulder varied as the submergence level changed. Relationships are proposed to predict the contribution of the near-bed turbulent events to the RSS around the boulder.Keywords
This publication has 18 references indexed in Scilit:
- Turbulence Characteristics in a Rock-Ramp-Type Fish PassJournal of Hydraulic Engineering, 2015
- Flow characteristics around a wall-mounted spherical obstacle in a thin boundary layerExperiments in Fluids, 2014
- Effects of a fully submerged boulder within a boulder array on the mean and turbulent flow fields: Implications to bedload transportActa Geophysica, 2012
- Laboratory Investigation of Turbulent Flow Structure around a Bed-Mounted Cube at Multiple Flow StagesJournal of Hydraulic Engineering, 2012
- Turbulent Flow Hydrodynamics and Sediment Transport: Laboratory Research with LDA and PIVPublished by Springer Science and Business Media LLC ,2011
- Nature of flow and turbulence structure around an in‐stream vertical plate in a shallow channel and the implications for sediment erosionWater Resources Research, 2009
- Surface Roughness Effects in Near-Bed Turbulence: Implications to Sediment EntrainmentJournal of Engineering Mechanics, 2001
- Effects of a pebble cluster on the turbulent structure of a depth-limited flow in a gravel-bed riverGeomorphology, 1998
- Robust Locally Weighted Regression and Smoothing ScatterplotsJournal of the American Statistical Association, 1979
- Prediction of the contributions to the Reynolds stress from bursting events in open-channel flowsJournal of Fluid Mechanics, 1977