Abstract:
The families of K-E and K-W turbulence models are performed for axisymmetric confined jets with back pressure and the results are compared with the experimental data. The physical model which is used as a source to evaluate the numerical results consists of a sudden pipe expansion, with an Expansion Ratio (ER) of 3.675. The results show that the realizable K-E model and RNG K-E model give a better prediction of the confined jet spreading rate, while the standard K-E and the family of K-W models end in overestimate approximations. However, some models have local superiority to the others, in special zones of the flow or give a better prediction of a class of flow parameters or flow characteristics. So, the authors ignore setting forth a special turbulence model for general implementation in numerical calculations for confined jets, but point out the efficiencies and deficiencies of each model.
Page(s):
121-126
DOI:
DOI not available
Published:
Journal: Journal of Applied Sciences, Volume: 7, Issue: 1, Year: 2007