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Title: Kolmogorov spectrum consistent optimization for multi-scale flow decomposition
Authors: Mishra, M.
Liu, X.
Skote, M.
Fu, C.-W.
Keywords: DRNTU::Engineering::Mechanical engineering
Issue Date: 2014
Source: Mishra, M., Liu, X., Skote, M., & Fu, C.-W. (2014). Kolmogorov spectrum consistent optimization for multi-scale flow decomposition. Physics of Fluids, 26(5), 055106-.
Series/Report no.: Physics of fluids
Abstract: Multi-scale analysis is widely adopted in turbulence research for studying flow structures corresponding to specific length scales in the Kolmogorov spectrum. In the present work, a new methodology based on novel optimization techniques for scale decomposition is introduced, which leads to a bandpass filter with prescribed properties. With this filter, we can efficiently perform scale decomposition using Fourier transform directly while adequately suppressing Gibbs ringing artifacts. Both 2D and 3D scale decomposition results are presented, together with qualitative and quantitative analysis. The comparison with existing multi-scale analysis technique is conducted to verify the effectiveness of our method. Validation of this decomposition technique is demonstrated both qualitatively and quantitatively. The advantage of the proposed methodology enables a precise specification of continuous length scales while preserving the original structures. These unique features of the proposed methodology may provide future insights into the evolution of turbulent flow structures.
DOI: 10.1063/1.4871106
Schools: School of Computer Engineering 
School of Mechanical and Aerospace Engineering 
Rights: © 2014 AIP Publishing LLC. This paper was published in Physics of Fluids and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The paper can be found at the following official DOI: [].  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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