A New Irreducible Dynamic Nonlinear Tensor-Diffusivity SGS Heat-Flux Model for LES of Convective Flows

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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
In this paper, a new irreducible dynamic nonlinear tensor diffusivity model based on Noll’s formulation is proposed for representing the subgrid-scale (SGS) heat flux. In contrast to the conventional eddy diffusivity type models, the proposed model does not require the alignment between the SGS heat flux and the resolved scalar gradient, and therefore allows for a more realistic geometrical representation of the SGS heat flux. Due to the inclusion of nonlinearity, the new SGS heat flux model improves the numerical stability of the simulations and can be applied locally in the flow without resorting to plane averaging for stable computation of the model coefficients.
Report Number
DRDC-SUFFIELD-SL-2006-053 — Scientific Literature
Date of publication
01 May 2006
Number of Pages
4
Reprinted from
Turbulence Heat and Mass Transfer 5, 2006, p 315-318
DSTKIM No
CA029309
CANDIS No
527601
Format(s):
Hardcopy;Document Image stored on Optical Disk

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