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A critical comparison of several low Reynolds number k-epsilon turbulence models for flow over a backward facing stepTurbulent backward-facing step flow was examined using four low turbulent Reynolds number k-epsilon models and one standard high Reynolds number technique. A tunnel configuration of 1:9 (step height: exit tunnel height) was used. The models tested include: the original Jones and Launder; Chien; Launder and Sharma; and the recent Shih and Lumley formulation. The experimental reference of Driver and Seegmiller was used to make detailed comparisons between reattachment length, velocity, pressure, turbulent kinetic energy, Reynolds shear stress, and skin friction predictions. The results indicated that the use of a wall function for the standard k-epsilon technique did not reduce the calculation accuracy for this separated flow when compared to the low turbulent Reynolds number techniques.
Document ID
19930023011
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Steffen, C. J., Jr. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1993
Subject Category
Numerical Analysis
Report/Patent Number
E-7873
AIAA PAPER 93-1927
NASA-TM-106173
NAS 1.15:106173
CMOTT-93-9
Meeting Information
Meeting: AIAA 29th Joint Propulsion Conference and Exhibit
Location: Monterey, CA
Country: United States
Start Date: June 28, 1993
End Date: June 30, 1993
Sponsors: AIAA, ASEE, SAE, ASME
Accession Number
93N32200
Funding Number(s)
PROJECT: RTOP 505-90-5K
CONTRACT_GRANT: NCC3-233
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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