Numerical simulations of cellular secondary currents and suspended sediment transport in open-channel flows over smooth-rough bed strips

Sung-Uk Choi, Moonhyeong Park, Hyeongsik Kang

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The flow and transport of suspended sediment in open-channel flows over smooth-rough bed strips were simulated numerically. The flow equations were solved with the aid of the Reynolds stress model. Simulated flow structures are provided and compared with measured data available in the literature. The comparisons indicate that the numerical model successfully predicts the mean flow and turbulence statistics. The sediment distribution of suspended particles in such flows was also simulated. The transport equation for suspended sediment was solved using the eddy diffusivity concept. The computed results show that flows with higher concentration occur over the smooth strips as observed in a river flow during the floods. The eddy diffusivity profile was also obtained and compared with that from an analytical expression reported by Wang and Cheng [Advances in Water Resources. 28(2005) 441-450].

Original languageEnglish
Pages (from-to)829-840
Number of pages12
JournalJournal of Hydraulic Research
Volume45
Issue number6
DOIs
Publication statusPublished - 2007 Jan 1

Fingerprint

Open channel flow
Suspended sediments
open channel flow
Sediment transport
suspended sediment
sediment transport
Computer simulation
Flow structure
Water resources
simulation
Numerical models
Sediments
Turbulence
Rivers
diffusivity
Statistics
eddy
flow structure
river flow
turbulence

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Water Science and Technology

Cite this

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title = "Numerical simulations of cellular secondary currents and suspended sediment transport in open-channel flows over smooth-rough bed strips",
abstract = "The flow and transport of suspended sediment in open-channel flows over smooth-rough bed strips were simulated numerically. The flow equations were solved with the aid of the Reynolds stress model. Simulated flow structures are provided and compared with measured data available in the literature. The comparisons indicate that the numerical model successfully predicts the mean flow and turbulence statistics. The sediment distribution of suspended particles in such flows was also simulated. The transport equation for suspended sediment was solved using the eddy diffusivity concept. The computed results show that flows with higher concentration occur over the smooth strips as observed in a river flow during the floods. The eddy diffusivity profile was also obtained and compared with that from an analytical expression reported by Wang and Cheng [Advances in Water Resources. 28(2005) 441-450].",
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Numerical simulations of cellular secondary currents and suspended sediment transport in open-channel flows over smooth-rough bed strips. / Choi, Sung-Uk; Park, Moonhyeong; Kang, Hyeongsik.

In: Journal of Hydraulic Research, Vol. 45, No. 6, 01.01.2007, p. 829-840.

Research output: Contribution to journalArticle

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AB - The flow and transport of suspended sediment in open-channel flows over smooth-rough bed strips were simulated numerically. The flow equations were solved with the aid of the Reynolds stress model. Simulated flow structures are provided and compared with measured data available in the literature. The comparisons indicate that the numerical model successfully predicts the mean flow and turbulence statistics. The sediment distribution of suspended particles in such flows was also simulated. The transport equation for suspended sediment was solved using the eddy diffusivity concept. The computed results show that flows with higher concentration occur over the smooth strips as observed in a river flow during the floods. The eddy diffusivity profile was also obtained and compared with that from an analytical expression reported by Wang and Cheng [Advances in Water Resources. 28(2005) 441-450].

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