E341 粗面境界上乱流のフィルタ平均とサブフィルタモデル(E-34 乱流渦構造(4),一般講演)

概要

論文の詳細を見る
Formal explicit filtering defined by the convolution integral over a flow region has been applied to derive fundamental equations of Large Eddy Simulation (LES) for turbulent flows over rough surfaces in which the boundary geometry cannot be resolved in full. Formal filtering allows smoothing of the boundary geometry as well as the flow and give precise expressions for extra terms that correspond to the commutation error terms and may also be interpreted as roughness resistance. DNS data obtained in a flow over an idealized rough wavy surface are analyzed to examine the distributions of these terms. It is found that the surface pressure integral terms are the more important term and a possible method of modeling them is shown.
日本流体力学会の論文
2004-08-09