Dynamic pressure fields in a local scour hole formed by a submerged wall jet

Previous studies investigated the flow in a local scour hole mainly from two perspectives, i.e. mean velocity and turbulence, but there is no literature exploring it from the perspective of pressure. This study investigates the dynamic pressure fields in a local scour hole formed by a wall jet using...

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Main Authors: Si, Jin-Hua, Lim, Siow Yong, Zhang, Jianmin, Wang, Xikun
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2023
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Online Access:https://hdl.handle.net/10356/164017
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1640172023-01-03T01:16:19Z Dynamic pressure fields in a local scour hole formed by a submerged wall jet Si, Jin-Hua Lim, Siow Yong Zhang, Jianmin Wang, Xikun School of Civil and Environmental Engineering Engineering::Environmental engineering Flow Field Local Scour Previous studies investigated the flow in a local scour hole mainly from two perspectives, i.e. mean velocity and turbulence, but there is no literature exploring it from the perspective of pressure. This study investigates the dynamic pressure fields in a local scour hole formed by a wall jet using PIV (particle image velocimetry) data to solve the Navier–Stokes (N-S) and Reynolds-averaged Navier–Stokes (RANS) equations, respectively. A comparison between the two cases with the effect of turbulence (solved by RANS equations) and without the effect (by N-S equations) reveals that turbulence reinforces pressure in the local sour hole. The wall jet experiences cyclical energy transitions in the forms between kinetic energy and pressure energy over its interactions with the sediment bed and the water surface. It is revealed that pressure energy is predominant by examining the ratios of the pressure energy to the average kinetic energy in the scour hole. Funding support from National Natural Science Foundation of China [grant numbers 52079057 and 52109095] is acknowledged. 2023-01-03T01:16:18Z 2023-01-03T01:16:18Z 2022 Journal Article Si, J., Lim, S. Y., Zhang, J. & Wang, X. (2022). Dynamic pressure fields in a local scour hole formed by a submerged wall jet. Journal of Hydraulic Research, 60(5), 701-711. https://dx.doi.org/10.1080/00221686.2022.2041501 0022-1686 https://hdl.handle.net/10356/164017 10.1080/00221686.2022.2041501 2-s2.0-85132129424 5 60 701 711 en Journal of Hydraulic Research © 2022 International Association for Hydro-Environment Engineering and Research. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Environmental engineering
Flow Field
Local Scour
spellingShingle Engineering::Environmental engineering
Flow Field
Local Scour
Si, Jin-Hua
Lim, Siow Yong
Zhang, Jianmin
Wang, Xikun
Dynamic pressure fields in a local scour hole formed by a submerged wall jet
description Previous studies investigated the flow in a local scour hole mainly from two perspectives, i.e. mean velocity and turbulence, but there is no literature exploring it from the perspective of pressure. This study investigates the dynamic pressure fields in a local scour hole formed by a wall jet using PIV (particle image velocimetry) data to solve the Navier–Stokes (N-S) and Reynolds-averaged Navier–Stokes (RANS) equations, respectively. A comparison between the two cases with the effect of turbulence (solved by RANS equations) and without the effect (by N-S equations) reveals that turbulence reinforces pressure in the local sour hole. The wall jet experiences cyclical energy transitions in the forms between kinetic energy and pressure energy over its interactions with the sediment bed and the water surface. It is revealed that pressure energy is predominant by examining the ratios of the pressure energy to the average kinetic energy in the scour hole.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Si, Jin-Hua
Lim, Siow Yong
Zhang, Jianmin
Wang, Xikun
format Article
author Si, Jin-Hua
Lim, Siow Yong
Zhang, Jianmin
Wang, Xikun
author_sort Si, Jin-Hua
title Dynamic pressure fields in a local scour hole formed by a submerged wall jet
title_short Dynamic pressure fields in a local scour hole formed by a submerged wall jet
title_full Dynamic pressure fields in a local scour hole formed by a submerged wall jet
title_fullStr Dynamic pressure fields in a local scour hole formed by a submerged wall jet
title_full_unstemmed Dynamic pressure fields in a local scour hole formed by a submerged wall jet
title_sort dynamic pressure fields in a local scour hole formed by a submerged wall jet
publishDate 2023
url https://hdl.handle.net/10356/164017
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