Application of a Reynolds stress/heat flux model to the turbulent thermal dispersion behind a line heat source in a uniformly sheared flow
- Korea Atomic Energy Research Inst., Taejon (Korea, Republic of). Hanaro Center
- Korea Advanced Inst. of Science and Technology, Taejon (Korea, Republic of). Dept. of Mechanical Engineering
A second-order Reynolds stress/heat flux closure model is applied to predict the turbulent thermal dispersion behind a line heat source in a uniformly sheared flow. The exact governing equations for Reynolds stress, heat flux, and other scalar fluctuating quantities are formulated and modeled. The concept of effective buoyancy Reynolds stress is introduced to incorporate the buoyancy effect in the turbulent thermal diffusion. The model predictions are compared with the relevant experiments. The simple gradient transport model predictions are also included for comparison. The model performance is shown to be generally satisfactory. Dispersion of passive scalar contaminant in turbulent flows is of prime importance, as it is closely related to many engineering problems, such as atmospheric pollutant dispersion and thermal pollution in rivers.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 596782
- Journal Information:
- Numerical Heat Transfer. Part A, Applications, Journal Name: Numerical Heat Transfer. Part A, Applications Journal Issue: 7 Vol. 32; ISSN NHAAES; ISSN 1040-7782
- Country of Publication:
- United States
- Language:
- English
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