Analysis of impinging and countercurrent stagnating flows by Reynolds stress model
SCIE
SCOPUS
- Title
- Analysis of impinging and countercurrent stagnating flows by Reynolds stress model
- Authors
- Im, YH; Huh, KY; Kim, KY
- Date Issued
- 2002-09
- Publisher
- ASME-AMER SOC MECHANICAL ENG
- Abstract
- Numerical simulation is performed for stagnating turbulent flows of impinging and countercurrent jets by the Reynolds stress model (RSM). Results are compared with those of the k-epsilon model and available data to assess the flow characteristics and turbulence models. Three variants of the RSM tested are those of Gibson and Launder (GL), Craft and Launder (GL-CL) and Speziale, Sarkar and Gatski (SSG). As is well known, the k-epsilon model significantly overestimates turbulent kinetic energy near the wall. Although the RSM is superior to the k-epsilon model, it shows considerable difference according to how the redistributive pressure-strain term is modeled. Results of the RSM for countercurrent jets are improved with the modified coefficients for the dissipation rate, C-epsilon1 and C-epsilon2, suggested by Champion and Libby. Anisotropic states of the stress near the stagnation region are assessed in terms of an anisotropy invariant map (AIM).
- Keywords
- PREMIXED TURBULENT COMBUSTION; PRESSURE-STRAIN MODEL; OPPOSED STREAMS; HEAT-TRANSFER; JETS; FIELD; PREDICTIONS; EXTINCTION; STATISTICS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/18903
- DOI
- 10.1115/1.1493815
- ISSN
- 0098-2202
- Article Type
- Article
- Citation
- JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME, vol. 124, no. 3, page. 706 - 718, 2002-09
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