Hybrid RANS/LES simulations of turbulent channel and diffuser flows

A. Gross, Hermann F Fasel

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

Abstract

The turbulent flow in a square-duct at a bulk Reynolds number of 10,000 was simulated using the flow simulation methodology and filter-based Reynolds-averaged Navier-Stokes hybrid turbulence models. Simulations were carried out for 3 different grid resolutions to determine how well the hybrid models adapt to changes in the grid resolution. A comparison of instantaneous flow fields, bulk velocities, and profiles of resolved, unresolved, and total turbulence kinetic energy is provided. The hybrid turbulence model that delivered the best results for the square-duct flow was then employed for simulations of the Stanford asymmetric diffuser. The diffuser flow is physically more complex and features a turbulent separation bubble.

Original languageEnglish (US)
Title of host publication48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
StatePublished - 2010
Event48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition - Orlando, FL, United States
Duration: Jan 4 2010Jan 7 2010

Other

Other48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
CountryUnited States
CityOrlando, FL
Period1/4/101/7/10

Fingerprint

Diffusers (fluid)
Turbulence models
Ducts
Flow simulation
Kinetic energy
Turbulent flow
Flow fields
Reynolds number
Turbulence

ASJC Scopus subject areas

  • Aerospace Engineering

Cite this

Gross, A., & Fasel, H. F. (2010). Hybrid RANS/LES simulations of turbulent channel and diffuser flows. In 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition [2010-0919]

Hybrid RANS/LES simulations of turbulent channel and diffuser flows. / Gross, A.; Fasel, Hermann F.

48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. 2010. 2010-0919.

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

Gross, A & Fasel, HF 2010, Hybrid RANS/LES simulations of turbulent channel and diffuser flows. in 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition., 2010-0919, 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Orlando, FL, United States, 1/4/10.
Gross A, Fasel HF. Hybrid RANS/LES simulations of turbulent channel and diffuser flows. In 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. 2010. 2010-0919
Gross, A. ; Fasel, Hermann F. / Hybrid RANS/LES simulations of turbulent channel and diffuser flows. 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. 2010.
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