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titleLESのダイナミック壁面モデル: 高レイノルズ数流れの壁面摩擦と乱流統計量の正確な予測
Other TitleA dynamic wall-modeling in large-eddy simulation: accurate predition of skin friction and turbulence at high Reynolds numbers
Author(jpn)河合, 宗司
Author(eng)Kawai, Soshi
Author Affiliation(jpn)宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS)
Author Affiliation(eng)Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)
Issue Date2012-03-30
Japan Aerospace Exploration Agency (JAXA)
Publication title宇宙航空研究開発機構特別資料: 第43回流体力学講演会: 航空宇宙数値シミュレーション技術シンポジウム2011論文集
JAXA special publication: Proceedings of 43rd Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2011
Start page55
End page61
Publication date2012-03-30
AbstractWe propose a simple yet effient wall-modeling in large-eddy simulation at very high Reynolds numbers. The proposed wall models wall shear stress directly and thus is sifferent from popular hybrid LES/RANS and DES approaces. The model stems directly from considerations of how turbulence lenghth scales behave in the logarithmic layer, and thus in other words the method is based solidly on physical reasoning. Surpersonic turbulent boundary layers on a flat plate at very high and moderately high Reynolds numbers. Mach 1.69 and Re(sub theta)=50,000, are simulated. The resulting method is shown to accurately predict equilibrium boundary layer, with both realistic instantaneous fields and accurate turbulent statistics. The wall-model and the arguments leading to the proposed method are presented for compressible flows, but everything exends trivially to incompressible flows.
DescriptionPhysical characteristics: Original contains color illustrations
Meeting Information: 43rd Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2011 (July 7-8, 2011. Waseda University, International Conference Center), Tokyo Japan
形態: カラー図版あり
会議情報: 第43回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2011 (2011年7月7日-8日. 早稲田大学国際会議場) 東京
Document TypeConference Paper
JAXA Category特別資料
Report NoJAXA-SP-11-015

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