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101
Development of a One-Equation Transition/Turbulence Model
This paper reports on the development of a unified one-equation model for the prediction of transitional and turbulent flows. An eddy viscosity - transport equation for non-turbulent fluctuation growth based on that proposed by Warren and Hassan (Journal of Aircraft, Vol. 35, No. 5) is combined with the Spalart-Allmaras one-equation model for turbulent fluctuation growth. Blending of the two equations is accomplished through a multidimensional intermittence function based on the work of Dhawan and Narasimha (Journal of Fluid Mechanics, Vol. 3, No. 4). The model predicts both the onset and extent of transition. Low-speed test cases include transitional flow over a flat plate, a single element airfoil, and a multi-element airfoil in landing configuration. High-speed test cases include transitional Mach 3.5 flow over a 5{degree} cone and Mach 6 flow over a flared-cone configuration. Results are compared with experimental data, and the spatial accuracy of selected predictions is analyzed.
Date:
September 26, 2000
Creator:
EDWARDS,JACK R.; ROY,CHRISTOPHER J.; BLOTTNER,FREDERICK G. & HASSAN,HASSAN A.
System:
The UNT Digital Library
Examination of the Mesoscopic Scale Response of Shock Compressed Heterogeneous Materials Using a Line-Imaging Velocity Interferometer
None
Date:
September 26, 2000
Creator:
Trott, Wayne M.; Castañeda, Jaime N.; O'Hare, John J.; Knudson, Marcus D.; Chhabildas, Lalit C.; Baer, M. R. et al.
System:
The UNT Digital Library
Innovative Approaches to Resolving Orphan Materials Problems in the DOE Complex
None
Date:
September 26, 2000
Creator:
Polansky, Gary F. & Parks, David L.
System:
The UNT Digital Library
Proceedings of the eighteenth symposium on energy engineering sciences.
None
Date:
September 26, 2000
Creator:
unknown
System:
The UNT Digital Library
Functional analysis of members of the isoflavone and isoflavanone O-methyltransferase enzyme families from the model legume Medicago truncatula
Article on a functional analysis of members of the isoflavone and isoflavanone O-methyltransferase enzyme families from the model legume Medicago truncatula.
Date:
September 26, 2006
Creator:
Deavours, Bettina E.; Liu, Chang-Jun; Naoumkina, Marina A.; Tang, Yuhong; Farag, Mohamed A.; Sumner, Lloyd W. et al.
System:
The UNT Digital Library