TY - JOUR
T1 - Performance of a hybrid les/rans model combined with a wall function for predicting quite high reynolds-number turbulent channel flows up to reτ = 6 × 107
AU - Abe, Ken Ichi
N1 - Funding Information:
The present computation was primarily carried out using the computer facilities at the Research Institute for Information Technology, Kyushu University, Japan. This research was supported by JSPS KAKENHI Grant Number JP19K12005. The present images were partially created using Field View as provided by Intelligent Light through its University Partners Program.
Funding Information:
The present computation was primarily carried out using the computer facilities at the Research Institute for Information Technology, Kyushu University, Japan. This research was supported by JSPS KAKENHI Grant Number JP19K12005. The present images were partially created using FieldView as provided by Intelligent Light through its University Partners Program.
Publisher Copyright:
© 2020 The Japan Society of Mechanical Engineers.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020
Y1 - 2020
N2 - Performance of an anisotropy-resolving hybrid LES/RANS (HLR) model was investigated. An important feature of this HLR model is the introduction of an extra anisotropic term in a sub-grid scale (SGS) model for large eddy simulation (LES) to represent the SGS stress anisotropy more correctly. Although the basic performance of this model was validated in some previous studies, it is still unclear how the model works for very high Reynolds-number (Re) turbulent flows, in which no-slip wall conditions are no more applicable. Thus, to investigate the predictive performance of this HLR model, it was applied to very high Re turbulent channel flows up to Reτ = 6 × 107, together with a conventional wall function as the wall-boundary condition. The computational results obtained by the present anisotropic HLR model were carefully compared with those by an isotropic HLR model.
AB - Performance of an anisotropy-resolving hybrid LES/RANS (HLR) model was investigated. An important feature of this HLR model is the introduction of an extra anisotropic term in a sub-grid scale (SGS) model for large eddy simulation (LES) to represent the SGS stress anisotropy more correctly. Although the basic performance of this model was validated in some previous studies, it is still unclear how the model works for very high Reynolds-number (Re) turbulent flows, in which no-slip wall conditions are no more applicable. Thus, to investigate the predictive performance of this HLR model, it was applied to very high Re turbulent channel flows up to Reτ = 6 × 107, together with a conventional wall function as the wall-boundary condition. The computational results obtained by the present anisotropic HLR model were carefully compared with those by an isotropic HLR model.
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U2 - 10.1299/jtst.2020jtst0014
DO - 10.1299/jtst.2020jtst0014
M3 - Article
AN - SCOPUS:85088964058
SN - 1880-5566
VL - 15
SP - 1
EP - 10
JO - Journal of Thermal Science and Technology
JF - Journal of Thermal Science and Technology
IS - 2
M1 - JTST0014
ER -