@Article{CiCP-24-104,
author = {Miao Guo, Xuelin Tang, Yanwen Su, Xiaoqin Li and Fujun Wang},
title = {Applications of Three-Dimensional LBM-LES Combined Model for Pump Intakes},
journal = {Communications in Computational Physics},
year = {2018},
volume = {24},
number = {1},
pages = {104--122},
abstract = {<p style="text-align: justify;">Lattice Boltzmann model (LBM) in conjunction with an accurate Large Eddy
Simulation (LES) technology was proposed to simulate various vortical structures and
their evolutions in open pump intakes. The strain rate tensor in the LES model is locally
calculated by means of non-equilibrium moments based on Chapman-Enskog
expansion, and bounce-back scheme was used for non-slip condition on solid walls
and reflection scheme for free surface. The presented model was applied to investigate
free-surface and wall-attached vortices for different water levels and flow rate. The
vortex position, shapes and vorticities were predicted successfully under three flowing
cases (i.e. critical water level (CWL), lower water level, lower flow rate), and the
numerical velocity and streamline distribution were analyzed systematically. For CWL
based on Froude number considering open channel flows, the shape and the location
of various dynamic vortices were captured. Compare to the experimental results of
CWL, more vortices were predicted for lower water level, and less vortices were observed
for lower flow rate. The predicted velocities and vortex locations are in good
agreement with the experimental of a small physical model. The comparisons demonstrated
the feasibility and stability of above-mentioned model and numerical method
in predicting vortex flows inside open pump intakes.</p>},
issn = {1991-7120},
doi = {https://doi.org/10.4208/cicp.OA-2017-0092},
url = {http://global-sci.org/intro/article_detail/cicp/10930.html}
}