A novel experimental technique and its application to study the effects of particle density and flow submergence on bed particle saltation

Mohammad Amir, Vladimir I. Nikora, Matthew Witz

Research output: Contribution to journalArticle

2 Citations (Scopus)
7 Downloads (Pure)

Abstract

A novel technique has been developed to measure bed particle flight durations and amplitudes using the impact data from the records of instantaneous pressure acting on multiple bed particles. It has the potential to measure many more particle jumps compared to other methods, thus generating records long enough for well-converged statistics of the variables of interest. The proposed technique has been validated with independent measurements by a tracking method using a four camera particle image velocimetry system. The application of this technique in a laboratory study revealed that probability distributions and statistical moments of flight durations and heights are strongly dependent on flow submergence and particle density.
Original languageEnglish
Pages (from-to)101-113
Number of pages13
JournalJournal of Hydraulic Research
Volume55
Issue number1
Early online date24 Oct 2016
DOIs
Publication statusPublished - 2017

Fingerprint

saltation
submergence
Velocity measurement
Probability distributions
Cameras
Statistics
flight
effect
particle
method

Keywords

  • open-channel flow
  • particle entrainment
  • particle flight durations
  • particle flight heights
  • pressure sensors
  • saltation
  • sediment particles

Cite this

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title = "A novel experimental technique and its application to study the effects of particle density and flow submergence on bed particle saltation",
abstract = "A novel technique has been developed to measure bed particle flight durations and amplitudes using the impact data from the records of instantaneous pressure acting on multiple bed particles. It has the potential to measure many more particle jumps compared to other methods, thus generating records long enough for well-converged statistics of the variables of interest. The proposed technique has been validated with independent measurements by a tracking method using a four camera particle image velocimetry system. The application of this technique in a laboratory study revealed that probability distributions and statistical moments of flight durations and heights are strongly dependent on flow submergence and particle density.",
keywords = "open-channel flow, particle entrainment, particle flight durations, particle flight heights, pressure sensors, saltation, sediment particles",
author = "Mohammad Amir and Nikora, {Vladimir I.} and Matthew Witz",
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year = "2017",
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T1 - A novel experimental technique and its application to study the effects of particle density and flow submergence on bed particle saltation

AU - Amir, Mohammad

AU - Nikora, Vladimir I.

AU - Witz, Matthew

N1 - This research was sponsored by EPSRC grant EP/G056404/1 which is greatly appreciated.

PY - 2017

Y1 - 2017

N2 - A novel technique has been developed to measure bed particle flight durations and amplitudes using the impact data from the records of instantaneous pressure acting on multiple bed particles. It has the potential to measure many more particle jumps compared to other methods, thus generating records long enough for well-converged statistics of the variables of interest. The proposed technique has been validated with independent measurements by a tracking method using a four camera particle image velocimetry system. The application of this technique in a laboratory study revealed that probability distributions and statistical moments of flight durations and heights are strongly dependent on flow submergence and particle density.

AB - A novel technique has been developed to measure bed particle flight durations and amplitudes using the impact data from the records of instantaneous pressure acting on multiple bed particles. It has the potential to measure many more particle jumps compared to other methods, thus generating records long enough for well-converged statistics of the variables of interest. The proposed technique has been validated with independent measurements by a tracking method using a four camera particle image velocimetry system. The application of this technique in a laboratory study revealed that probability distributions and statistical moments of flight durations and heights are strongly dependent on flow submergence and particle density.

KW - open-channel flow

KW - particle entrainment

KW - particle flight durations

KW - particle flight heights

KW - pressure sensors

KW - saltation

KW - sediment particles

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DO - 10.1080/00221686.2016.1233583

M3 - Article

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EP - 113

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JF - Journal of Hydraulic Research

SN - 0022-1686

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ER -