Modeling of laminar-to-turbulent transition using a hybrid multi-scale simulation strategy

Laminar-to-turbulent transition is a phenomenon observed in practical applications. Robust computational models are needed to predict the onset of transition and the associated flow dynamics. Direct numerical simulation (DNS), although suitable for fundamental studies, tends to be computationally expensive, thus making large-eddy simulations (LES) a viable strategy. In LES, large scales of the flow field are computed, and the effects of small scales are modeled. In this study, the hybrid two-level large-eddy simulation strategy (TLS-LES) is being assessed for its ability to predict features of transition. The TLS-LES strategy blends the two-level simulation (TLS) and LES models. TLS is a multi-scale model, in which both large and small scales are computed. The present work compares the TLS-LES approach with the other models by simulating temporal transition within two canonical flows: the Taylor-Green Vortex and plane Poiseuille flow. The assessment is performed by comparing the results against corresponding DNS.

Grantor dc:publisher

University of Tennessee at Chattanooga

Author dc:creator

• Young, Mickael

Contributors dc:contributor

• Ranjan, Reetesh
• Sreenivas, Kidambi; Margraves, Charles
• College of Engineering and Computer Science

• Computational fluid dynamics
• Turbulence--Mathematical models

Licence

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language

English, eng

Repository record dc:identifier

https://scholar.utc.edu/theses/772

OAI identifier oai:identifier

oai:scholar.utc.edu:theses-1946