CEE 595W
“Geometry
relations between resolved and subgrid scales as
derived from analysis of multi-dimensional velocity measurements”
Bo Tao
Abstract
In the context of large-eddy simulation, the scale and geometry relationships between the parameters of the resolved and subgrid scales are characterized. The tensorial alignment of the deviatoric SGS stress relative to the filtered strain-rate is shown to have a bi-modal behavior (Tao, et al. 2002). To gain further insight into the geometric statistics of the SGS stress, Germano decomposition (Leonard 1974; Germano 1986) is used and the alignments of the individual stress components are investigated. To examine these statistical geometry trends, several analysis tools for realizing the tensorial structures and orientations have been developed. They can be readily applied to study the characteristics of other flows obtained either experimentally or from numerical simulations.
Room 1518 Hydrosystems Lab
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