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Extension of an algebraic intermittency model for better prediction of transition in separated layers under strong free-stream turbulence

S. Kubacki, D. Simoni, D. Lengani, M. Dellacasagrande and Erik Dick (UGent)
(2021) INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW. 92.
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Abstract
A constitutive law describing the Reynolds stresses in boundary layers undergoing laminar-to-turbulent transition, constructed in previous work by elastic-net regression on an experimental data base, is used to improve an algebraic transition model for cases with transition in a separated layer influenced by a high level of free-stream turbulence. The basic transition model is extended by an additional production term in the transport equation for turbulent kinetic energy. A sensor detects the front part of a separated layer and activates the production term, which expresses the faster breakdown by the effect of the Klebanoff streaks generated upstream of separation on the Kelvin-Helmholtz instability rolls in the separated part of the layer.
Keywords
laminar-to-turbulent boundary layer transition, transition modelling, algebraic intermittency model, separation-induced transition, BOUNDARY-LAYER, BYPASS TRANSITION, BUBBLES, VERSION

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MLA
Kubacki, S., et al. “Extension of an Algebraic Intermittency Model for Better Prediction of Transition in Separated Layers under Strong Free-Stream Turbulence.” INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, vol. 92, 2021, doi:10.1016/j.ijheatfluidflow.2021.108860.
APA
Kubacki, S., Simoni, D., Lengani, D., Dellacasagrande, M., & Dick, E. (2021). Extension of an algebraic intermittency model for better prediction of transition in separated layers under strong free-stream turbulence. INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, 92. https://doi.org/10.1016/j.ijheatfluidflow.2021.108860
Chicago author-date
Kubacki, S., D. Simoni, D. Lengani, M. Dellacasagrande, and Erik Dick. 2021. “Extension of an Algebraic Intermittency Model for Better Prediction of Transition in Separated Layers under Strong Free-Stream Turbulence.” INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW 92. https://doi.org/10.1016/j.ijheatfluidflow.2021.108860.
Chicago author-date (all authors)
Kubacki, S., D. Simoni, D. Lengani, M. Dellacasagrande, and Erik Dick. 2021. “Extension of an Algebraic Intermittency Model for Better Prediction of Transition in Separated Layers under Strong Free-Stream Turbulence.” INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW 92. doi:10.1016/j.ijheatfluidflow.2021.108860.
Vancouver
1.
Kubacki S, Simoni D, Lengani D, Dellacasagrande M, Dick E. Extension of an algebraic intermittency model for better prediction of transition in separated layers under strong free-stream turbulence. INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW. 2021;92.
IEEE
[1]
S. Kubacki, D. Simoni, D. Lengani, M. Dellacasagrande, and E. Dick, “Extension of an algebraic intermittency model for better prediction of transition in separated layers under strong free-stream turbulence,” INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, vol. 92, 2021.
@article{8727933,
  abstract     = {{A constitutive law describing the Reynolds stresses in boundary layers undergoing laminar-to-turbulent transition, constructed in previous work by elastic-net regression on an experimental data base, is used to improve an algebraic transition model for cases with transition in a separated layer influenced by a high level of free-stream turbulence. The basic transition model is extended by an additional production term in the transport equation for turbulent kinetic energy. A sensor detects the front part of a separated layer and activates the production term, which expresses the faster breakdown by the effect of the Klebanoff streaks generated upstream of separation on the Kelvin-Helmholtz instability rolls in the separated part of the layer.}},
  articleno    = {{108860}},
  author       = {{Kubacki, S. and Simoni, D. and Lengani, D. and Dellacasagrande, M. and Dick, Erik}},
  issn         = {{0142-727X}},
  journal      = {{INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW}},
  keywords     = {{laminar-to-turbulent boundary layer transition,transition modelling,algebraic intermittency model,separation-induced transition,BOUNDARY-LAYER,BYPASS TRANSITION,BUBBLES,VERSION}},
  language     = {{eng}},
  pages        = {{16}},
  title        = {{Extension of an algebraic intermittency model for better prediction of transition in separated layers under strong free-stream turbulence}},
  url          = {{http://doi.org/10.1016/j.ijheatfluidflow.2021.108860}},
  volume       = {{92}},
  year         = {{2021}},
}
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