Validation of large-eddy simulation of strongly curved stationary and rotating U-duct flows

GÜLEREN K. M., Turan A.

INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, cilt.28, sa.5, ss.909-921, 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 28 Sayı: 5
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1016/j.ijheatfluidflow.2006.11.010
  • Dergi Adı: INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.909-921
  • Anahtar Kelimeler: large-eddy simulation, strong curvature, U-duct, rotation, non-conforming mesh, TURBULENT-FLOW, HEAT-TRANSFER, CHANNEL, SQUARE
  • Eskişehir Osmangazi Üniversitesi Adresli: Hayır

Özet

Numerical predictions of the developing turbulent flow through stationary and rotating U-ducts with strong curvature are presented using large-eddy simulation (LES). The primary aim is to validate LES in a strongly curved U-duct for three different cases: stationary (non-rotating), positive and negative rotational cases. Selected flow models have provided a challenging test for the methodology adopted in terms of boundary conditions, wall functions and subgrid-scale (SGS) models, which are still regarded as crucial research topics within the context of LES. The agreement between the predictions and experimental data is quite satisfactory considering the coarse grid adopted. Discrepancies are observed to diminish near the lateral walls due to the relatively fine grid resolution. It is seen that LES performs better than the two-component-limit (TCL) RANS model in predicting the quantitative features of the turbulent flow through a U-duct with a non-conforming mesh adaptation. (c) 2007 Elsevier Inc. All rights reserved.