Next Article in Journal
Occurrence, Distribution, and Risk Assessment of Antibiotics in a Subtropical River-Reservoir System
Previous Article in Journal
Submerged Fixed Floating Structure under the Action of Surface Current
Open AccessArticle

Numerical and Physical Investigation of the Performance of Turbulence Modeling Schemes around a Scour Hole Downstream of a Fixed Bed Protection

Department of Civil and Environmental Engineering, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Korea
*
Author to whom correspondence should be addressed.
Water 2018, 10(2), 103; https://doi.org/10.3390/w10020103
Received: 17 November 2017 / Revised: 19 January 2018 / Accepted: 22 January 2018 / Published: 26 January 2018
Local scour occurs around hydraulic structures such as piers, bed protections, and dikes. In this study, the turbulent flow around a scour hole downstream of a fixed bed protection was investigated. Numerical modeling with OpenFOAM was applied to compute the flow velocity and turbulent kinetic energy with respect to flow conditions by changing water depth. A proper computational grid size and time step for simulations are suggested. Three typical turbulent models, k ε , k ω , and k ω S S T , were considered for simulating the flow around a scour hole. The performances of the three models were evaluated by comparing them with numerical and laboratory experimental results. Mean flow velocity profiles computed by the three turbulent schemes are generally in good agreement with laboratory measurements. However, k ω has a limitation in simulating reversal flow in the scour hole, and the k ε model does not predict turbulent kinetic energy well near the bottom. Thus, this study found that the most suitable turbulent model for simulating flow around a scour hole downstream of a fixed bed protection is the k ω S S T model. View Full-Text
Keywords: local scour; turbulent model; kε; kω; kωSST; OpenFOAM local scour; turbulent model; kε; kω; kωSST; OpenFOAM
Show Figures

Figure 1

MDPI and ACS Style

Nguyen, T.H.T.; Ahn, J.; Park, S.W. Numerical and Physical Investigation of the Performance of Turbulence Modeling Schemes around a Scour Hole Downstream of a Fixed Bed Protection. Water 2018, 10, 103.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop