Lattice Boltzmann Simulations of Flow around a Confined Elliptical Cylinder

The ۲D laminar flow past an elliptical cylinder confined in a channel is investigated numerically using the Lattice Boltzmann method (LBM). The present LB method with the used boundary conditions is validated in simulations of the incompressible flow past a circular cylinder. The simulations are carried out for different angles of incidence: ۰ ≤ϴ ≤ ۹۰ in the range of Reynolds numbers ۵ ≤ Re ≤ ۱۰۰ for aspect ratios of AR=۰.۲۵, ۰.۵. The effects of those parameters on the drag and lift coefficients and other flow characteristics of thecylinder are examined in detail. The results demonstrate that the drag and lift coefficients increase with the increase of ϴ . It is seen that vortex shedding is not occurred at high Reynolds numbers at ϴ = ۰ .

کلیدواژه ها:

Elliptical cylinder ، Lattice Boltzmann method ، Strouhal number ، Drag and lift coefficients