A study with sensitivty analysis of the k-epsilon turbulence model applied to jet flows
Abstract
Sensitivity analysis has been applied to the k-epsilon turbulence model for the flow of a round jet. The results of the investigation show that the modifications of the k-epsilon model have been mainly successful due to the conservation of momentum property of the round jet. For this particular flow, almost all of the k-epsilon model constants could have been used to achieve the experimental spreading rate. The results of investigations also show some very large sensitivities at the jet boundaries to the empirical coefficients in the epsilon equation. These large sensitivities do not seem to agree completely with what is known about jet turbulent structure, and there is a need to improve the k-epsilon model in this area. A general conclusion of the research is that sensitivity analysis is and can be a valuable tool in understanding complex turbulent transport.
- Publication:
-
AIAA, Aerospace Sciences Meeting
- Pub Date:
- January 1983
- Bibcode:
- 1983aiaa.meetT....R
- Keywords:
-
- Computational Fluid Dynamics;
- Flow Equations;
- Jet Flow;
- K-Epsilon Turbulence Model;
- Sensitivity;
- Turbulent Flow;
- Aerodynamic Coefficients;
- Momentum;
- Fluid Mechanics and Heat Transfer