Turbulence Model Comparisons for Shear Layers and Axisymmetric Jets.
Abstract
Comparisons were made between experiment and theory to assess the capability of turbulent mixing models to predict the fluid flow-properties in the mixing region of both shear layers and jets. Jets exiting into both moving and quiescent streams were investigated. Attention was centered on two turbulence models: (i) k epsilon two and (ii) k omega prime. The same numerical flow field code was utilized with both turbulence models thus allowing a direct comparison of the turbulence models without fear of difference in the numerics masking the results. Results showed significant errors can be made when utilizing these models for prediction of shear flows of interest. The flow structure for these shear flows is in no way accounted for by the models and hence poor predictions result. It is felt the basic vortex structure will have to be modeled before significant improvement in the modeling will occur. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1979
- Accession Number
- ADA094438
Entities
People
- B. J. Walker
Organizations
- United States Army Aviation and Missile Command