摘要
计算流体力学主要研究如何通过数值方法来求解流体力学的控制方程。本文以不可压缩库埃特流为例,在有理论解析解的基础上建立显式、隐式方法的有限差分法控制方程,并提出了基于压力修正法的第三种方法,采用Matlab编程求解流场分布,并研究推进步数、等分数、时间间隔与雷诺数对计算误差的影响。通过对经典流动现象力学特性的学习,可加深学生对计算流体力学求解基本方法和思路的理解,培养理论联系实践的能力。
Computational fluid mechanics mainly studies how to solve the governing equations of fluid mechanics through numerical methods.In this paper,taking the incompressible Couette flow as an example,based on the theoretical analytical solution,the finite difference control equations of explicit method and implicit method are established,and the third method based on pressure correction method is proposed.The flow field distribution is solved by Matlab programming,and the effects of propulsion steps,equal fraction,time interval,and Reynolds number on the calculation error are studied.By studying the mechanical characteristics of classical flow phenomena,students can deepen their understanding of the basic methods and ideas of computational fluid mechanics,and cultivate the ability to integrate theory with practice.
作者
刘益
付小莉
LIU Yi;FU Xiaoli(School of Civil Engineering,Tongji University,Shanghai 200092,China)
出处
《力学与实践》
北大核心
2022年第4期969-973,共5页
Mechanics in Engineering
基金
国家自然科学基金(51879191)
同济大学2021—2022年度课程思政教改课题(KCSZ-B-20210209)资助项目。
关键词
计算流体力学
库埃特流
教学改革
computational fluid mechanics
Couette flow
educational reform
