论文部分内容阅读
格子气自动机和格子Boltzmann方法的迅速发展提供了一类求解流体力学问题的新的方法。本文中,我们介绍了Boltzmann方法,解决了格子气方法中的缺点,通过选择适当平衡分布及其参数,导出了Navier-Stokers方程,并得到了声速和粘性系数。最后在微机上模拟了在无限长平板流动问题及绕单分离板的流动问题,得到了卡门涡街。结果表该模型有格子气方法及其它的数值方法所没有的优点,计算更精确、更直观、更有效。
The rapid development of lattice gas automaton and lattice Boltzmann method provides a new method for solving fluid mechanics problems. In this paper, we introduce the Boltzmann method, which solves the shortcomings of the lattice gas method. By choosing the appropriate equilibrium distribution and its parameters, we derive the Navier-Stokers equation and obtain the acoustic velocity and viscosity coefficient. Finally, the problem of flow in an infinite flat plate and the flow around a single separation plate is simulated on a microcomputer, and a Karman vortex street is obtained. Results Table The model has the lattice gas method and other numerical methods do not have the advantages of more accurate calculation, more intuitive and more effective.