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Modeling and Simulation of Transitional Taylor-Green Vortex Flow with PANS by Pereira, Filipe S.; Grinstein, Fernando; Israel, Daniel M.; Rauenzahn, Rick; Girimaji, Sharath S. is a scholarly article available to read on EtoBox.

What is Modeling and Simulation of Transitional Taylor-Green Vortex Flow with PANS about?

The PANS equations model is used to predict the transitional Taylor-Green vortex (TGV) flow at Re=3000. A new form of the closure is proposed, in which the PANS procedure is applied to a variant of the BHR turbulence model. The TGV is a benchmark case for transitional flows in which the onset of turbulence is driven by vortex-stretching and reconnection mechanisms. Since these physical phenomena are observed in numerous flows of variable-density, this study constitutes the first step toward extending the PANS method to such a class of problems. We start by deriving the governing equations of the model and analyze the selection of the parameters controlling its physical resolution, fe and fk, through a-priori testing. Afterward, we conduct PANS computations at different constant physical resolutions to evaluate the model's accuracy and cost predicting the TGV flow. This is performed through simple verification and validation exercises, and the physical and modeling interpretation of the numerical predictions. The results confirm that PANS can efficiently (accuracy vs. cost) predict the present flow problem. Yet, this is closely dependent on the physical resolution of the model. Wher

Author

Pereira, Filipe S.; Grinstein, Fernando; Israel, Daniel M.; Rauenzahn, Rick; Girimaji, Sharath S.

Published

2020

Language

EN