Application of Lattice Boltzmann Method in Fluid Flow and Heat Transfer

Introduction 1.1 Computational Fluid Dynamics (CFD) methods In fluid dynamics, there are three levels to describe the motion of a fluid: microscopic level, mesoscopic level and macroscopic level [1].On different levels, there exist the corresponding models to represent the fluid flow.No matter what kind of model used, eventually each of these models should satisfy the general conservation laws, i.e., conservation of mass, conservation of momentum and conservation of energy in the macroscopic world, in which the corresponding macroscopic variables (velocity, pressure and temperature) could be measured by using various kinds of sensor.Fig. 1.Various approaches to describe fluid flow at different level www.intechopen.com