Article detail · 2008
The Role of Impulse on the Initiation of Particle Movement Under Turbulent Flow Conditions
- Year
- 2008
- Type
- article
Data source split
- YÖKSİS YÖKSİS article record
- YÖKSİS venue Science
- Catalog match (ISSN) Science
- OpenAlex OpenAlex enrichment (abstract, citations, topics)
Abstract
OpenAlex · English
Fundamental to our understanding of erosional and transport phenomena in earth-surface dynamics and engineering is knowledge of the conditions under which sediment motion will begin when subjected to turbulent flow. The onset criterion currently in use emphasizes the time-averaged boundary shear stress and therefore is incapable of accounting for the fluctuating forces encountered in turbulent flows. We have validated through laboratory experiments and analytical formulation of the problem a criterion based upon the impulse imparted to a sediment grain. We demonstrate that in addition to the magnitude of the instantaneous turbulent forces applied on a sediment grain, the duration of these turbulent forces is also important in determining the sediment grain's threshold of motion, and that their product, or impulse, is better suited for specifying such conditions.
Topics
Citations
OpenAlex cited_by_count. Not a WoS or Scopus citation count; those sources have no separate column here.
352 citations
OpenAlex cited_by_count (cache / database)
15 publications in the local catalog that cite this work (OpenAlex reference match; not the full global list).
- Role of instantaneous force magnitude and duration on particle entrainment 2010
- Impulse and particle dislodgement under turbulent flow conditions 2010
- Instantaneous turbulent forces and impulse on a rough bed Implications for initiation of bed material movement 2013
- Accounting for the role of turbulent flow on particle dislodgement via a coupled quadrant analysis of velocity and pressure sequences 2017
- The role of increasing riverbank vegetation density on flow dynamics across an asymmetrical channel 2021
- Instantaneous pressure measurements on a spherical grain under threshold flow conditions 2014
- Nonintrusive Method for Detecting Particle Movement Characteristics near Threshold Flow Conditions 2010
- Assessing Riverbed Surface Destabilization Risk Downstream Isolated Vegetation Elements 2022
- Fluid flow lifting a body from a solid surface 2018
- Investigating the Effects of Bed Roughness on Incipient Motion in Rigid Boundary Channels with Developed Hybrid Geno-Fuzzy versus Neuro-Fuzzy Models 2021