NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Calculations of Diffuser Flows with an Anisotropic K-Epsilon ModelA newly developed anisotropic K-epsilon model is applied to calculate three axisymmetric diffuser flows with or without separation. The new model uses a quadratic stress-strain relation and satisfies the realizability conditions, i.e., it ensures both the positivity of the turbulent normal stresses and the Schwarz' inequality between any fluctuating velocities. Calculations are carried out with a finite-element method. A second-order accurate, bounded convection scheme and sufficiently fine grids are used to ensure numerical credibility of the solutions. The standard K-epsilon model is also used in order to highlight the performance of the new model. Comparison with the experimental data shows that the anisotropic K-epsilon model performs consistently better than does the standard K-epsilon model in all of the three test cases.
Document ID
19960011371
Acquisition Source
Headquarters
Document Type
Conference Paper
Authors
Zhu, J. (NASA Lewis Research Center Cleveland, OH, United States)
Shih, T.-H. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 6, 2013
Publication Date
October 1, 1995
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
E-9988
NASA-CR-198418
NIPS-96-07528
CMOTT-95-4
ICOMP-95-21
NAS 1.26:198418
Meeting Information
Meeting: International Symposium on Engineering Turbulence Modeling and Measurements
Location: Crete
Country: Greece
Start Date: May 27, 1996
End Date: May 29, 1996
Accession Number
96N17807
Funding Number(s)
PROJECT: RTOP 505-90-5K
CONTRACT_GRANT: NCC3-370
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available