Open AccessNumerical simulation of surface flow through the lattice boltzmann method using sub-basin junction
Author(s) -
Vanderlei Galina,
Jocelaine Cargnelutti,
Eloy Kaviski,
Liliana Madalena Gramani,
Adilandri Mércio Lobeiro
Publication year - 2021
Publication title -
revista internacional de métodos numéricos para cálculo y diseño en ingeniería
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.213
H-Index - 9
eISSN - 1886-158X
pISSN - 0213-1315
DOI - 10.23967/j.rimni.2021.09.006
Subject(s) - lattice boltzmann methods , structural basin , computer simulation , surface runoff , baseflow , flow (mathematics) , geology , watershed , mechanics , hydrology (agriculture) , geometry , geomorphology , physics , mathematics , geotechnical engineering , streamflow , drainage basin , computer science , geography , ecology , cartography , machine learning , biology
The watershed surface runoff was investigated through the one-dimensional numerical simulation using the Lattice Boltzmann Method (LBM). A computational model was developed where the watershed is represented by the junction of nine sub-basins. For this, two equilibrium distribution functions were established through the Chapman-Enskog Expansion on a D1Q5 lattice, one suitable for flow on the basin surface and another for the main channel, obtaining the water depth on the basin surface and the channels cross-sectional area. In addition, the boundary condition was established in the flow passage from one sub-basin to another, taking into account the mass conservation and, in order to obtain a simulation closer to reality, it was considered an initial river flow (baseflow) of each channel stretch. The numerical results obtained by the LBM were compared with data measured in field.