Turbulence Topologies Predicted using a Dynamic Non-Linear Subgrid-Scale Model Based on Speziale’s Quadratic Constitutive Relation

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Authors
  1. Wang, B-.C.
  2. Yin, J.
  3. Yee, E.
  4. Bergstrom, D.J.
Corporate Authors
Defence R&D Canada - Suffield, Ralston ALTA (CAN);Saskatchewan Univ, Saskatoon SASK (CAN) Dept of Mechanical Engineering
Abstract
Turbulence topologies related to the invariants of the resolved velocity gradient and strain rate tensors are studied. The a posteriori large-eddy simulation (LES) approach adopted in this research is based on a dynamic non-linear subgrid-scale model, In contrast to most of the previous research which focused on only isotropic turbulence, the present study examines the influence of near-wall anisotropy on flow topologies. Some interesting phenomenological results have been obtained including a wing-shaped contour pattern for the marginal expectation of the resolved enstrophy generation and the negative shift of the peak location (mode) in the joint probability density function (JPDF) of invariants of the resolved rate of strain tensor. The newly observed turbulence phenomenologies are believed to be important and efforts have been made to explain them on an analytical basis.
Report Number
DRDC-SUFFIELD-SL-2005-057 — Scientific Literature
Date of publication
01 Jun 2005
Number of Pages
6
Reprinted from
Turbulence and Shear Flow Phenomena, 27-29 June 2005, p. 1055-1060
DSTKIM No
CA029310
CANDIS No
527602
Format(s):
Hardcopy;Document Image stored on Optical Disk

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