A general one-equation turbulence model for free shear and wall-bounded flows |
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Authors: | Ehab Fares Wolfgang Schröder |
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Institution: | (1) Aerodynamisches Institut, RWTH Aachen Wüllnerstrasse 5-7, Aachen, Germany |
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Abstract: | The purpose of thiswork is to introduce a complete and general one-equation model capable of correctly predicting a wide class
of fundamental turbulent flows like boundary layer, wake, jet, and vortical flows. The starting point is the mature and validated
two-equation k−ω turbulence model of Wilcox. The newly derived one-equation model has several advantages and yields better predictions than
the Spalart-Allmaras model for jet and vortical flows while retaining the same efficiency and quality of the results for near-wall
turbulent flows without using a wall distance. The derivation and validation of the new model using findings computed by the
Spalart-Allmaras and the k−ω models are presented and discussed for several free shear and wall-bounded flows. |
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Keywords: | one-equation turbulence model |
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