RELATION BETWEEN COHERENT STRUCTURE AND SCALING LAW IN RAYLEIGH-BENARD CONVECTION BASED ON WAVELET TRANSFORMATION  

作　　者：FUQiang JIANGMin XIAKe-qing 

机构地区：[1]SchoolofScience,P.L.A.UniversityofScienceandTechnology,Nanjing211101,China Departmentofphysics,TheChineseUniversityofHongKong,HongKong,China, [2]SchoolofScience,P.L.A.UniversityofScienceandTechnology,Nanjing211101,China [3]Departmentofphysics,TheChineseUniversityofHongKong,HongKong,China

出　　处：《Journal of Hydrodynamics》2004年第4期436-441,共6页水动力学研究与进展B辑（英文版）

基　　金：ThisWorkwassupportedbytheResearchGrantsCounciloftheHongKongSpecialAdministrativeRegion (GrantNo :CUHK319/ 96p)

摘　　要：In this paper, the Extended Self Similarity (ESS) was used to study thescaling exponent ξ(q) of temperature data in the Reyleigh-Benard convection and its variation withexperimental measuring locations. The results show that ξ(q) varies with locations and agrees wellwith experimental data. And then the wavelet transformation is used to extract the coherentstructure, by means of the definition of a called non-coherent signal. we can understand theinfluence of coherent structure on ξ(q) and the relations between large scale vortex motions andsmall ones.In this paper, the Extended Self Similarity (ESS) was used to study thescaling exponent ξ(q) of temperature data in the Reyleigh-Benard convection and its variation withexperimental measuring locations. The results show that ξ(q) varies with locations and agrees wellwith experimental data. And then the wavelet transformation is used to extract the coherentstructure, by means of the definition of a called non-coherent signal. we can understand theinfluence of coherent structure on ξ(q) and the relations between large scale vortex motions andsmall ones.

关 键 词：scaling law coherent structure wavelet transformation rayleigh-benardconvection 

分 类 号：TV131.2[水利工程—水力学及河流动力学]