台风,孤立子和螺旋结构——学科融合研究的一条途径  

TYPHOON, SOLITON AND HELICAL STRUCTURE—AN APPROACH TO COMBINE DIFFERENT DISCPLINES

作　　者：赵松年[1] 胡非[1] 朱江[1] 

机构地区：[1]中国科学院大气物理研究所,大气边界层物理和大气化学国家重点实验室,北京100029

出　　处：《力学与实践》2014年第4期422-428,共7页Mechanics in Engineering

基　　金：国家自然科学基金资助项目(61271425)

摘　　要：台风和孤立子都是小尺度不稳定流动受扰动的激励,吸收基本流场的能量而形成的.当它们各自所受的耗散、弥散、平流或对流作用分别达到平衡时,其运动形态在一段较长时间内保持稳定.通过研究螺旋结构,考察它们在局域能量维持方面相似的动力学特性.通过理论分析和大型地球流体模拟转盘的双台风实验、以及拟开展的数值实验,将探索和检验"能否将台风看作是大尺度三维螺旋孤立子",这既是研究台风和孤立子的形成机制及其动力学特性的一种新的思路,也是将二者融合起来研究的方法论的一种新途径.When the small scale unstable flows are excited by disturbance, they absorb energy from the basic flow field, a large scale movement pattern will arise, that is, the typhoon or the soliton will form. The forces include those related with dissipation, dispersion, advection or convection, and when all these forces come to an equilibrium, the corresponding movement pattern will be stable over a long time. With respect to the helical structure, we can investigate its similar dynamics in terms of the local energy. Theoretical analyses and simulation experiments about double typhoons by means of a large-scale geophysical fluid annulus, as well as numerical experiments （which will be carried out） may soNe the following problem： whether the typhoon can be seen as a three-dimensional large scale helical soliton. It is a new idea, which is, therefore, helpful for the understanding of the formation mechanism and the dynamic characteristics of typhoon and soliton, and it is also a new research approach to combine the two aspects of the methodology.

关 键 词：台风 螺旋孤立子 科里奥利力 数值模拟 基本流场 

分 类 号：O415.3[理学—理论物理]