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http://dx.doi.org/10.12652/Ksce.2014.34.3.0833

Large Eddy Simulation of Rectangular Open-Channel Flow using OpenFOAM  

Ban, Chaewoong (Yonsei University)
Choi, Sung-Uk (Yonsei University)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.34, no.3, 2014 , pp. 833-840 More about this Journal
Abstract
This study presents numerical simulation of turbulent flows in a rectangular open-channel that has a width-to-depth ratio of 2 using the source code provided by OpenFOAM. Large eddy simulations are carried out by solving the filtered continuity and momentum equations numerically. For the non-isotropic residual stress term, Smagorinsky's (1963) model is used. The flow in the open-channel whose width-to-depth ratio is 2, from experiment of Tominaga et al. (1989), is simulated numerically. Simulation results are compared with measured data by Tominga et al. (1989) and Nezu and Rodi (1985) and with LES data by Shi et al. (1999). Comparisons revealed that the model simulates the mean flow and turbulence statistics well. Specifically, the model reproduced the inner secondary currents located at the corner of sidewall and free surface successfully. In addition, the vortical component of turbulence intensity shows bulged contours towards the bottom edge.
Keywords
Large eddy simulation; Turbulence; OpenFOAM; Inner secondary currents; Reynolds stress; Turbulence intensity;
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