A local correlation-based algebraic transition model in k-ω SST formulation

Date

2026-01-01

Author

Okumu, Bilal
Baran, Özgür Uğraş
Baş, Onur

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A new correlation-based algebraic transition model using local variables is proposed. Instead of solving an additional transport equation for intermittency, the model employs an intermittency function that controls the source terms of the turbulence model used. Thus, the model reduces the number of constants and functions needed, and achieves to solve problems by using less computational power compared to one-or two-equation transition models. The intermittency function of the present model is a more sophisticated modified version of that in the SA-BCM transition model, and it is coupled with the k-w SST turbulence model to eliminate the shortcomings in the SA-BCM model. The present model involves only four calibration constant, which are calibrated against the cases other than validation cases. The model is validated against a series of common flat plate experiments and four airfoil test cases. The results show a good agreement with the experiments and that the new model provides comparable success with more complicated transition models. Therefore, the present model provides an alternative means to include boundary layer transition effects in CFD simulations by reducing the number of constants and functions needed compared to that in other transition models.

URI

https://hdl.handle.net/11511/115908

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Department of Mechanical Engineering, Article