【摘要】 简要介绍了格子Boltzm ann方法以及耦合温度的格子Boltzm ann方法,就LBM采用不同边界处理分别对二维方腔自然对流进行了模拟以及对比。同时,推导出LBM中更为完整的体力项的表达式,并采用简化的体力项与较完整体力项分别进行数值模拟,将结果进行了对比分析。模拟的结果与前人的结果吻合良好。更多还原

【Abstract】 Lattice Boltzmann method together with thermal lattice Boltzmann method are briefly introduced.Thermal lattice Boltzmann method is applied to simulate two-dimensional cavity natural convection flow,using different boundary treatments.Also,a more accurate body force term expression is deduced,and comparison is made between approximate expression and more accurate expression.The present results are in good agreement with the solutions of previous studies.更多还原