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Title: Dynamic pressure fields in a local scour hole formed by a submerged wall jet
Authors: Si, Jin-Hua
Lim, Siow Yong
Zhang, Jianmin
Wang, Xikun
Keywords: Engineering::Environmental engineering
Issue Date: 2022
Source: 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.
Journal: Journal of Hydraulic Research
Abstract: 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.
ISSN: 0022-1686
DOI: 10.1080/00221686.2022.2041501
Schools: School of Civil and Environmental Engineering 
Rights: © 2022 International Association for Hydro-Environment Engineering and Research. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:CEE Journal Articles

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