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Water 2018, 10(5), 615; https://doi.org/10.3390/w10050615

Application of a Steady Meandering River with Piers Using a Lattice Boltzmann Sub-Grid Model in Curvilinear Coordinate Grid

1
Department of Environmental Science, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
2
South China Institute of Environmental Sciences, The Ministry of Environmental Protection of PRC, Guangzhou 510655, China
*
Author to whom correspondence should be addressed.
Received: 4 April 2018 / Revised: 28 April 2018 / Accepted: 3 May 2018 / Published: 9 May 2018
(This article belongs to the Section Hydraulics)
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Abstract

A sub-grid multiple relaxation time (MRT) lattice Boltzmann model with curvilinear coordinates is applied to simulate an artificial meandering river. The method is based on the D2Q9 model and standard Smagorinsky sub-grid scale (SGS) model is introduced to simulate meandering flows. The interpolation supplemented lattice Boltzmann method (ISLBM) and the non-equilibrium extrapolation method are used for second-order accuracy and boundary conditions. The proposed model was validated by a meandering channel with a 180° bend and applied to a steady curved river with piers. Excellent agreement between the simulated results and previous computational and experimental data was found, showing that MRT-LBM (MRT lattice Boltzmann method) coupled with a Smagorinsky sub-grid scale (SGS) model in a curvilinear coordinates grid is capable of simulating practical meandering flows. View Full-Text
Keywords: multiple relaxation time lattice Boltzmann model (MRT-LBM); meandering river; standard Smagorinsky sub-grid scale (SGS) model; curvilinear coordinate multiple relaxation time lattice Boltzmann model (MRT-LBM); meandering river; standard Smagorinsky sub-grid scale (SGS) model; curvilinear coordinate
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Chen, L.; Zhao, Z.; Huang, P. Application of a Steady Meandering River with Piers Using a Lattice Boltzmann Sub-Grid Model in Curvilinear Coordinate Grid. Water 2018, 10, 615.

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