自适应原理在尺度分离技术中的应用  

THE APPLICATION OF SELF-ADAPTIVE PRINCIPLE TO THE SCALE SEPARATION

作　　者：刘金良[1] 汪钟兴[1] 

机构地区：[1]中国科技大学地球和空间科学系,合肥230026

出　　处：《热带气象学报》1993年第1期85-89,共5页Journal of Tropical Meteorology

摘　　要：把计算流体中网格生成过程的自适应原理引入尺度分离研究中,即由各中尺度系统相对于所分离尺度系统的变化程度来决定其恢复系数,而不是采用通常的只有一个恢复系数的办法(即各种尺度相同程度地被恢复),从而使所需要的分离尺度系统集中于最大响应波长附近,这样就排除相同程度恢复所造成的对分离尺度系统的虚假增长.最后以实例作了比较说明.In this artical, the self-adaptive principle, first issued in the Computational Fluid Mechanics, is applied to the study of scale separation. The recovering coefficient of each scalesystem is not a constant (i. e. each to be recovered to the same extent) like that used in the conventional method, but is determined according to its magnitude of variation relative to the scale system to be separated, which may then be more efficiently concentrated near the maximum responding wavelength, avoiding the false growth caused by the same extent recovery.

关 键 词：尺度分离 滤波技术 天气 动力学 

分 类 号：P432.1[天文地球—大气科学及气象学]