壁面せん断流中の物質拡散の研究 : 第2報,円管内壁面点源プルームの変動濃度場の統計的特性

概要

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A wall point source plume, that is emitted to a wall turbulent shear flow, will be mixed and convected by the turbulent flow which scale varies with distance from the wall. This feature makes the wall point source plume show the bimodal feature in its concentration fluctuation held. In this paper, the statistical properties of the concentration fluctuation of the wall point source plume in a turbulent pipe flow will be mainly reported. Vertical profiles of the integral scale in several cross sections downstream from a wall point source show self-similarity and bimodal distributions like as in a point source plume in a turbulent boundary layer on a flat plate. In addition, vertical profiles of the dissipation of the concentration fluctuation show also self-similarity. Kullback-Leibler divergence of PDFs of the concentration will also be discussed.
社団法人日本機械学会の論文
1996-08-25