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A nonlinear stress–strain model for wall-bounded turbulent flows

✍ Scribed by Jens Knoell; Dale B. Taulbee

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
192 KB
Volume
22
Category
Article
ISSN
0142-727X

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✦ Synopsis

A nonlinear stress±strain model, derived from the modeled Reynolds stress transport equation, is modi®ed to account for the near wall eects in wall-bounded turbulent ¯ows. Since it is known that wall re¯ection of the turbulent pressure ®eld modi®es the pressure±strain correlation, the approach taken is to introduce a correction to the coecients in the closure for the pressure±strain correlation purely based on ideas for full Reynolds stress closures. The stress±strain relation is implemented in the context of the k± model with a variable C l . Results are presented for plane channel ¯ow and both zero and adverse pressure gradient boundary layers. Favorable results for the anisotropies in the Reynolds stresses are obtained by the new model as validated by comparisons against direct numerical simulation (DNS) and experimental data.

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