Open AccessNumerical simulation model of vertical velocity distribution in a channel with artificial floating bed
Author(s) -
Yu Bai,
Yong Duan,
Wenjun Yue
Publication year - 2020
Publication title -
water science and technology water supply
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.318
H-Index - 39
eISSN - 1607-0798
pISSN - 1606-9749
DOI - 10.2166/ws.2020.101
Subject(s) - mean squared error , drag coefficient , lattice boltzmann methods , drag , mechanics , discretization , large eddy simulation , turbulence , computer simulation , channel (broadcasting) , simulation , mathematics , geology , engineering , physics , mathematical analysis , statistics , electrical engineering
Artificial floating bed (AFB), as a novel type of ecological drainage ditch, is extensively used worldwide. To more effectively design the structure of the project, an accurate velocity model is required. In this study, a two-dimensional Lattice Boltzmann method (LBM) was employed for the simulation of the vertical velocity in a channel with AFB. The large eddy simulation (LES) was conducted to simulate turbulent flows, while the drag force of AFB was discretized with a centered scheme. Two sets of experimental data were used to verify the model, the mean value of root mean square error (RMSE) and coefficient of determination (R) are 0.93 and 1.84, respectively. This proved that the proposed model is more effective to simulate the vertical velocity in a channel with AFB.
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