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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
Lattice Boltzmann Simulation Past a Circular Cylinder: Comparison Between Models and Boundary Conditions
Submission Author:
Jorge Lucas Krenchiglova , PR
Co-Authors:
Jorge Lucas Krenchiglova, Paulo Philippi, Luís Orlando Emerich dos Santos
Presenter: Jorge Lucas Krenchiglova
doi://10.26678/ABCM.ENCIT2020.CIT20-0203
Abstract
This paper presents the numerical simulation of an incompressible two-dimensional flow around a circular cylindrical obstacle for a variety of Reynolds numbers. Three different models of the Lattice Boltzmann (LB) equation are discussed: the classic kinetic model BGK, a regularized model and a model with two relaxation times, for the latter two approaches are presented and compared. Also, a large number of different boundary conditions are compared. To validate the results, the drag coefficients and the flow representation were compared with several authors in the literature. It was possible to conclude that the models presented here are very well suitable both for the estimation of the aerodynamics coefficients and for the representation of the flow.
Keywords
Lattice Boltzmann method, Regularized Model, Two Relaxation Times, Lift and Drag Force
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