Character istics of How past a Square Cylinder- using th e Lat tice Boltzmann Method

The Lattice Boltzmann Method (LBM) has heen seen a, an alternative tool for the computational simulation of fluid dynamics In This study, we use the LBM with Single-Relaxaltion-Time (SRT) collision model to ,simulate two-dimensional (2D) laminar flow past a square cylinder. The main aim of the study is to systematically investigate the influence of the location, of the inflow. outflow and side wall boundaries.where Reynolds number is kept at 100 for all calculations. The side wall boundary locations will be analyzed using the periodic and symmetric boundary conditions, Analyses of the relaxation time parameter also have been investigated. Some physical quantities such as the drag coefficient, mean drag coefficient root mean square values of lift coefficient and the Strouhal number are examined for the purpose. We also examined the vortex shedding formation which provides an excellent mean, of visualizing the von Karman vortex street. We found that there is a certain range for inflow, outflow and side wall boundaries where physical quantities such as drag and mean drag coefficients. [root mean square value of lift codficient and the Strouhal number show somee changes, Results also show that. there is a change for physical quantities when the relaxation time parameter is changed from certain range and also effecl the computational time, The physical quantities are obtained and compared with other exsiting experimental and numerical results keys:Lattice Boltzmann method. single relaxation time, square cylinder, vortex shedding, mean drag coefficient. Strouhal number