浮力の影響を考慮した乱流熱拡散に関する基礎的研究

概要

論文の詳細を見る
The thermal environment in an enclosed space such as the reefer holds of a refrigerated cargo ship is controlled by cold air circulations with adequate temperatures. An analysis of the thermal distribution in an enclosed space having the tendency to form thermal layers is necessary to investigate the anisotropic turbulent flow subjected to gravitational effects. For this purpose, Reynolds stresses and turbulent heat flux in the momentum and heat transport equations should be estimated including the buoyant effects of the gravitational field. In this paper, the approximate expressions of Reynolds stresses and turbulent heat flux based on the Launder's formula are proposed. These expressions are so explict that the diffusion terms are differentiable and the gravitational influence becomes directly visible in the momentum and heat transport equations. In order to investigate the justification of these approximate expressions, calculations on the free shear flows, a two-dimensional jet and a channel flow are carried out and the proposed expressions are proved to be effective for the analysis of non-isothermal turbulent flow.
社団法人日本船舶海洋工学会の論文
1989-08-25