伝熱管内の速度と温度の乱れの生成および散逸

概要

論文の詳細を見る
The balances of velocity and temperature fluctuation energy and of turbulent heat flux have been evaluated in fully developed pipe flow of air. In the wall region, the streamwise component of velocity fluctuations transfers vast amounts of energy to the cross stream components. Except in the near-centerline region, the production and dissipation of temperature fluctuations are very nearly in balance. The production of turbulent heat flux is of the same order of magnitude as the pressure-temperature gradient correlation over most of the pipe section. The production of turbulent quantities pertaining to the turbulent heat transfer is totally dominated by the coherent turbulent structures near the wall. The energy-containing eddies are found to have a scale comparable to that of the coherent structures. The ratio of temperature and velocity dissipation time scales depends significantly on the production mechanism, and thus changes with the distance from the wall.
一般社団法人日本機械学会の論文
1985-02-25