INVESTIGATION OF INLET EFFECTS ON BACKWARD-FACING STEP FLOW PREDICTION
Küçük Resim Yok
Tarih
2016
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Csme Trans
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The turbulent flow over backward-facing step (BFS) is numerically investigated by using FLUENT (R) code. Both uniform and non-uniform velocity profiles are used as inlet boundary condition. Five different Reynolds averaged Navier-Stokes (RANS) turbulence models are employed. The Std. k-omega model shows the best agreement with the experimental data among the models used under the conditions considered in this study. The results show that using a uniform velocity profile has a negative effect on predictions if the domain is not sufficiently extended upstream from the inlet. To eliminate this effect, the domain should be extended upstream by about 10D(h) from the inlet. However, results show that this extension causes absorption effects of inlet parameters such as inlet turbulence intensity.
Açıklama
Anahtar Kelimeler
backward-facing step flow, turbulence models, inlet effects, velocity profile
Kaynak
Transactions Of The Canadian Society For Mechanical Engineering
WoS Q Değeri
Q4
Scopus Q Değeri
Q3
Cilt
40
Sayı
3
