Frequency Analysis of Chaotic Flow in Transition to Turbulence in Taylor-Couette System with Small Aspect Ratio

International Conference on Computing and Applied Informatics 2016

物理学;计算机科学

Fujii, Tatsuya^1 ; Oishi, Yoshihiko^1 ; Kawai, Hideki^1 ; Kikura, Hiroshige^2 ; Stepanus Situmorang, Riky^1 ; Ambarita, Himsar^3

Muroran Institute of Technology, Mizumoto-cho 27-1, Muroran, Hokkaido

050-8585, Japan^1

Tokyo Institute of Technology, Ookayama 2-12-1, Meguro-ku, Tokyo

152-8550, Japan^2

University of Sumatera Utara, Jl. Almamater Kampus USU, Medan

20155, Indonesia^3

关键词: Frequency Analysis;    Small aspect ratio;    Taylor Couette flow;    Taylor-Couette systems;    Transition to turbulence;    Transition-to-turbulent flows;    Ultrasound measurement;    Vortex structures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/801/1/012063/pdf
DOI  :  10.1088/1742-6596/801/1/012063

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Taylor-Couette flow with small aspect ratio has characteristics such as the different vortex structure, because of a boundary layer of the upper and lower wall and the acceleration of the inner cylinder. In this study, the mechanism of Taylor-Couette system with the small aspect ratio is measured and analyzed by using an ultrasound measurement and a numerical simulation. The process of transition to turbulent flow is observed by using a spectra analysis in a radial and an axial direction. The experimental and numerical results confirmed the characteristics of the broadband component in Taylor-Couette system.