Computations of the flows over the weir changing from the submerged to surface flows

Seongwook Choi, Sung Uk Choi

Research output: Contribution to conferencePaperpeer-review

Abstract

Flow over the embankment-type weir shows a transition from the submerged hydraulic jump to the surface flow as the tailwater depth increases. The submerged hydraulic jump induces so called “hydraulic or drowning machine” downstream of the weir and severe scour in the vicinities of the free surface and bed, respectively. The increase of the tailwater depth makes the transition to the surface flow, resulting in the dramatic change of the flow structure. This study attempted numerical simulations of the two flow regimes for the flow over the embankment-type weir using the k-ω SST model. Both submerged hydraulic jump and surface flow are simulated and computed results are compared not only with measured data but also with results by the k-ε model. Hydraulic characteristics of the two flow regimes are presented and discussed.

Original languageEnglish
Publication statusPublished - 2020
Event22nd Congress of the International Association for Hydro-Environment Engineering and Research-Asia Pacific Division: Creating Resilience to Water-Related Challenges, IAHR-APD 2020 - Sapporo, Virtual, Japan
Duration: 2020 Sep 142020 Sep 17

Conference

Conference22nd Congress of the International Association for Hydro-Environment Engineering and Research-Asia Pacific Division: Creating Resilience to Water-Related Challenges, IAHR-APD 2020
Country/TerritoryJapan
CitySapporo, Virtual
Period20/9/1420/9/17

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (NRF2017R1A2A2A05069836).

Publisher Copyright:
© 2020 22nd Congress of the International Association for Hydro-Environment Engineering and Research-Asia Pacific Division, IAHR-APD 2020: "Creating Resilience to Water-Related Challenges". All rights reserved.

All Science Journal Classification (ASJC) codes

  • Ecology
  • Environmental Engineering

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