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Baroclinic Torque and Implications for Subgrid-Scale Modeling

GS, Sidharth and Candler, Graham V. and Dimotakis, Paul E. (2014) Baroclinic Torque and Implications for Subgrid-Scale Modeling. In: 7th AIAA Theoretical Fluid Mechanics Conference. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2014-3214. ISBN 9781624102936. https://resolver.caltech.edu/CaltechAUTHORS:20190816-144342348

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Abstract

Baroclinic torque plays an important role in the dynamics of variable-density flows. Large eddy simulations using Favre-filtered resolved-scale velocities mask the explicit dependence of resolved-scale dynamics on subgrid-scale pressure-gradient-density interactions. The effect of subgrid-scale baroclinic torque on resolved scales is implicitly included in the subgrid-scale stress and subgrid-scale scalar fluxes through the resolved-scale vorticity it generates. LES closure models must therefore incorporate this effect in the computations. We explore the physics of subgrid-scale baroclinic torque within the structural framework of the Stretched-Vortex model. Fine-scale simulations of supersonic flows and direct numerical simulations of variable-density turbulence are investigated. Such flows have regions of active baroclinic torque and serve to set up flow configurations to assess the model.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.2514/6.2014-3214DOIArticle
Additional Information:© 2014 American Institute of Aeronautics and Astronautics.
Group:GALCIT
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AIAA Paper2014-3214
Record Number:CaltechAUTHORS:20190816-144342348
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190816-144342348
Official Citation:Baroclinic Torque and Implications for Subgrid-Scale Modeling Sidharth GS, Graham V. Candler, and Paul Dimotakis 7th AIAA Theoretical Fluid Mechanics Conference. https://doi.org/10.2514/6.2014-3214
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97986
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:19 Aug 2019 21:31
Last Modified:03 Oct 2019 21:36

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