LES of complex compressible turbulent flows

Air Force Office of Scientific Research           Postdoctoral fellow: Noma Park  
Hypersonics Center, ONR

                  

The objective of this project is to develop the simulation capability for DNS/LES of compressible turbulent flows in complex geometries. Our incompressible unstructured grid solver (Mahesh et al., 2004, Journal of Computational Physics) is being extended to compressible flows. Research focuses on discretely energy conserving discretization approaches (a least squares based approach is under development), shock-capturing (a localized shock-capturing scheme that is applied as a corrector step to a non-dissipative predictor solution is under development), and theoretically predicting numerical errors in LES (an EDQNM based theory has been developed). The unstructured solver is being developed with shock wave/boundary layer interaction, and jets in supersonic crossflow in mind as initial applications. Also research is being conducted to develop novel subgrid models and error analysis of LES.

 

Publications

  • N. Park & K. Mahesh, 2008
    Reduction of the Germano identity error in the dynamic subgrid model
    Accepted for publication in Physics of Fluids.

 

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