用时间相关法求解定常粘性流场的加速收敛法  

Accelerating-convergence Approach for Solving a Steady Viscous Flow Field through the Use of a Time-marching Method

作　　者：张艳英[1] 吴猛[1] 苏杰先[1] 崔明根[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《热能动力工程》2001年第5期540-542,共3页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金资助项目 ( 5 96 36 180 )

摘　　要：作者详细分析了显、隐格式的CFL数后 ,指出影响CFL数大小的关键原因在于离散方式。要提高用时间相关法求解定常流场的收敛速度 ,就必须加大CFL数。而加大CFL数的最直接、最有效的方法是选用隐式方法。作者在兼顾CFL数和精度的情况下 。After a detailed analysis of the CFL number of explicit and implicit scheme it is noted that the key factor influencing the magnitude of CFL lies in a discrete form. To enhance the speed of convergence in solving a steady flow field when a time-marching method is used, it is essential to enlarge the CFL number. Meanwhile, the most direct and effective approach for enlarging CFL number is to select an implicit scheme. Under the condition of meeting both a required CFL number and precision a combination of Taylor expansion method and TVD scheme can produce a kind of implicit method featuring an accelerating convergence.

关 键 词：TVD格式 隐式方法 加速收敛 粘性流场 求解 时间相关法 定常问题 流体力学 

分 类 号：O357[理学—流体力学]