Filtered velocity based LES of mixing in high speed recirculating shear flow

G. S. Sidharth, Anand Kartha, Graham V. Candler

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Scopus citations


Development of efficient hypersonic air-breathing propulsion system requires under-standing the mixing of fuel in a supersonic flow. Experiments1-3 at the S3L facility in Caltech investigate fundamental mixing of fuel with supersonic gas stream in an expansion-ramp configuration. The flow is turbulent and exhibits spatio-temporal pressure and density variations due to compressibility and heat release. The present work aims to develop and study subgrid-scale models for simulating the flow in the experiment. In particular, we focus on incorporating the baroclinic (pertaining to pressure-gradient and density) and dilatational effects at subgrid-scales. These subgrid-scale effects cannot be directly represented in conventional density-filtered LES formulation using algebraic models available in the literature. We develop and a new concise filtered-velocity based LES formulation and simulate a specific flow-case studied in the experiments. A posteriori observations of the proposed formulation are reported on two-dimensional and three-dimensional simulations. The effect on key flow statistics is discussed.

Original languageEnglish (US)
Title of host publication46th AIAA Fluid Dynamics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624104367
StatePublished - 2016
Event46th AIAA Fluid Dynamics Conference, 2016 - Washington, United States
Duration: Jun 13 2016Jun 17 2016

Publication series

Name46th AIAA Fluid Dynamics Conference


Other46th AIAA Fluid Dynamics Conference, 2016
Country/TerritoryUnited States

Bibliographical note

Publisher Copyright:
© 2016, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.


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