壁乱流の準秩序運動と熱伝達

概要

論文の詳細を見る
In wall turbulence, the well-ordered motions determine the essential features of turbulent transport phenomena. In the present study, we have refined a previously developed detection algorithm for well-ordered motions (i.e., trajectory analysis method based on the (u, v)-quadrant splitting technique) and have investigated the relationship between well-ordered motions and heat transfer from structural points of view, i.e., trajectory analysis of the VITA heat transfer events, extraction of basic flow modules and the relevant heat transport, and the simulation of temperature fluctuations by means of an autoregressive (AR) model. As a result, it is shown that phase relationship of fluctuating velocity components dominates the essential characteristics of the transport processes of heat and momentum in wall turbulence and there exist the distinct differences in individual correspondence between well-ordered motions and heat transport processes which cannot be revealed by the widely used VITA technique.
一般社団法人日本機械学会の論文
1992-09-25