Abstract
The behavior of four turbulent flow models is examined under conditions of uniform shear and stable stratification. The models are the standard k-ɛ model, the realizable k-ɛ model, the RNG k-ɛ model and the Reynolds stress model. It is shown that this behavior is very much dependent on the gravitational production term in the turbulent dissipation equation, about which there is insufficient understanding in the literature. It is recommended that setting this term equal to zero for stable stratification may be the optimal solution, given the uncertainty of the data against which all models should be calibrated.
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Received: 2 July 2001 / Accepted: 12 August 2002
Acknowledgements Assistance of the Technion Vice-President Fund for the Promotion of Research is gratefully acknowledged. The author also wishes to thank the reviewers of the manuscript for their comments, which resulted in an improvement of the quality of the paper.
Responsible Editor: Hans Burchard
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Hassid, S. On the gravitational terms of the k-ɛ and other turbulence models. Ocean Dynamics 52, 169–178 (2002). https://doi.org/10.1007/s10236-002-0016-5
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DOI: https://doi.org/10.1007/s10236-002-0016-5