Next Article in Journal
Comparison of Local and Global Optimization Methods for Calibration of a 3D Morphodynamic Model of a Curved Channel
Previous Article in Journal
Wave Glider Observations of Surface Waves During Three Tropical Cyclones in the South China Sea
Previous Article in Special Issue
A Two-Dimensional Depth-Averaged Sediment Transport Mobile-Bed Model with Polygonal Meshes
Open AccessArticle

Numerical Assessment of Shear Boundary Layer Formation in Sewer Systems with Fluid-Sediment Phases

1
Department of Civil and Environmental Engineering, Hanbat National University, Daejeon 34158, Korea
2
Department of Civil and Environmental Engineering, Dongshin University, Naju 58245, Korea
3
School of Civil and Environmental Engineering, The University of Suwon, Gyeonggi-do 18323, Korea
*
Author to whom correspondence should be addressed.
Water 2020, 12(5), 1332; https://doi.org/10.3390/w12051332
Received: 27 March 2020 / Revised: 4 May 2020 / Accepted: 5 May 2020 / Published: 8 May 2020
(This article belongs to the Special Issue Multi-Dimensional Modeling of Flow and Sediment Transport)
Numerical and empirical studies of soil slurry transport and deposition in urban stormwater sewers are few, presumably due to the difficulty of direct observation of soil slurry flow in stormwater pipes. Slurry in a sewer system includes both suspended load and bedload, but few studies have attempted to demarcate these two components. A boundary layer is a crucial determinant of sediment transport capacity. Stormwater runoff enters the sewer in turbulent flow, mostly mixed with soil slurry generated by rainfall. In this paper, we attempt analysis using ANSYS Fluent commercial CFD software. We describe the development of a numerical analytical methodology capable of predicting the flow of soil slurry in stormwater pipes, and propose a method for estimating the sediment–flow boundary layer. Using this model, we simulated stormwater runoff with a large content of soil slurry during a rainfall event. We investigated soil slurry transport and predict the formation of shear boundary layer by varying the inlet conditions (volume of soil slurry entering the stormwater sewer system) and by analyzing the flow velocity field and soil slurry volume fraction in the pipes under various experimental flow conditions. Based on the shear and settling velocity of sediment particles, we propose criteria for the formation of a shear boundary layer in stormwater pipes. View Full-Text
Keywords: slurry; boundary layer; transportation; numerical analysis; shear velocity; settling velocity; sewers slurry; boundary layer; transportation; numerical analysis; shear velocity; settling velocity; sewers
Show Figures

Figure 1

MDPI and ACS Style

Song, Y.H.; Joo, J.G.; Lee, J.H.; Yoo, D.G. Numerical Assessment of Shear Boundary Layer Formation in Sewer Systems with Fluid-Sediment Phases. Water 2020, 12, 1332.

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