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A quasi-local measure of inter-scale transfer: An approach to understanding turbulence | | M.K. Rivera
; W.B. Daniel
; S.Y. Chen
; R.E. Ecke
; | | Date: |
3 Dec 2003 | | Subject: | Soft Condensed Matter | cond-mat.soft | | Affiliation: | 1 and 2), W.B. Daniel (1 and 2), S.Y. Chen (2 and 3) and R.E. Ecke (1 and 2) ( Condensed Matter and Thermal Physics Group, Los Alamos National Laboratory, The Center for Nonlinear Studies, Los Alamos National Laboratory, Department of Mechanical Engi | | Abstract: | Many questions remain in turbulence research---and related fields---about the underlying physical processes that transfer scalar quantities, such as the kinetic energy, between different length scales. Measurement of an ensemble-averaged flux between scales has long been possible using a variety of techniques, but instantaneous, spatially-local realizations of the transfer have not. The ability to visualize scale-to-scale transfer as a field quantity is crucial for developing a clear picture of the physics underlying the transfer processes and the role played by flow structure. A general technique for obtaining these scale-to-scale transfer fields, called the filter approach, is described. The effects of different filters, finite system size, and limited resolution are explored for experimental and numerical data of two-dimensional turbulence. | | Source: | arXiv, cond-mat/0312105 | | Services: | Forum | Review | PDF | Favorites | |
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