DocumentCode :
2414427
Title :
A Comparative Assessment of Variant k-epsilon Models for Engine Flow Applications
Author :
Amini, Behnaz ; Zoka, Hamid Motamedi ; Khaleghi, Hasan
fYear :
2011
fDate :
21-23 Oct. 2011
Firstpage :
1091
Lastpage :
1094
Abstract :
In this research, the performance of non-linear k-epsilon turbulence model in resolving the time delay between mean flow changes and its proportionate turbulent dissipation rate adjustment was investigated. For this purpose, the ability of Launder-Spalding linear, Sug a non-linear, Yak hot RNG, Rietz modified RNG k-epsilon models were compared in estimation of axial mean velocity profile and turbulent integral length scale evolution during engine compression stroke. Computed results showed that all the models can predict the acceptable results for velocity profile but for turbulent integral length scale curve Suga non-linear model is in a good agreement with Rietz modified RNG model prediction, while other models showed a different unrealistic behavior. It is concluded that, although in some features all the models have proper results, for integral length scale just modified RNG and non-linear models depict correspondence with experimental reported data.
Keywords :
Atmospheric modeling; Computational modeling; Data models; Engines; Equations; Fuels; Mathematical model; engine flow; turbulent integral length scale; variant k-epsilon turbulence models;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Computational and Information Sciences (ICCIS), 2011 International Conference on
Conference_Location :
Chengdu, China
Print_ISBN :
978-1-4577-1540-2
Type :
conf
DOI :
10.1109/ICCIS.2011.23
Filename :
6086395
Link To Document :
بازگشت