Método Lattice-Boltzmann aplicado a escoamentos externos

Abstract

In the context which processing power grows consistently, the search for more efficient numerical methods, able to take advantage of such resources and that leads to more competitive engineering solutions persists. In this sense, the present work explores, in the scope of Computational Fluid Dynamics, the Lattice Boltzmann Method (LBM), currently seen as a promising tool for the analysis of incompressible flows given its ease of implementation and possibility of extensive use of parallelized computing. Firstly, a literature review of pioneer and recent works regarding the solution of flow around a square cylinder through LBM was carried out aiming to better understand the level of agreement with well stablished methods in the academia and industry. Then, the C++ developed algorithm was benchmarked with a lid driven cavity flow, obtaining a satisfactory agreement. Finally, parameters such as pressure coefficient, drag coefficient and the Strouhal number obtained by the simulation of a square cylinder in free flow were compared to published results obtained through finite element method and also via LBM, calculated using the open source software openLB.