114 0

Numerical modeling of 3D turbulent free surface flow in natural waterways

Title
Numerical modeling of 3D turbulent free surface flow in natural waterways
Author
강석구
Keywords
Free surface flow; Level set method; Immersed boundary method; Hydraulic structures; Natural waterways; Turbulence
Issue Date
2012-04
Publisher
Elsevier Science B.V., Amsterdam.
Citation
ADVANCES IN WATER RESOURCES, 2012, 40, P.23-36
Abstract
We develop a numerical model capable of simulating three-dimensional, turbulent free surface flows in natural waterways. Free surface motion is captured by coupling the two-phase level set method and the sharp-interface curvilinear immersed boundary (CURVIB) method of Kang et al. [1]. The model solves the three-dimensional, incompressible, unsteady Reynolds-averaged Navier-Stokes (RANS) and continuity equations in generalized curvilinear coordinates using a fractional step method extended to handle multiphase flows. Turbulence is modeled by a two-equation RANS model implemented in the context of the CURVIB method. The accuracy of the level set method is verified by applying it to simulate two- and three-dimensional sloshing problems, and the potential of the model for simulating real life, turbulent free surface flows is demonstrated by applying it to carry out RANS simulation of flow past rock structures in a laboratory flume and flow in a field scale meandering channel. The simulations show that the method is able to accurately predict water surface elevation over complex hydraulic structures and bathymetry, and capture the transition between subcritical and supercritical flows without any special treatment. (C) 2012 Elsevier Ltd. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S030917081200022X?via%3Dihubhttp://hdl.handle.net/20.500.11754/46995
ISSN
0309-1708
DOI
10.1016/j.advwatres.2012.01.012
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE