418 加速する壁乱流におけるLESの適用性について(J12-3 乱流,反応流,混相流などの解析モデルと数値手法(3),J12 乱流,反応流,混相流などの解析モデルと数値手法,2005年度年次大会)

概要

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LES and DNS of accelerating plane channel flows were conducted to investigate the validity of LES to such a flow. From the DNS results, it was observed that a rather rapid acceleration process consists of two parts: the former is the increase of the streamwise turbulent intensity, or corresponding elongation of the sublayer streaks, and the latter is the re-distribution of the turbulence to the other two directions. It was found that LES with a simple eddy viscosity model could not reproduce the latter re-distribution process at both coarser and finer grid resolutions tested here, despite the better prediction of the former process regardless of the adopted grid resolution.
社団法人日本機械学会の論文
2005-09-18