水平円管内層流強制対流熱伝達に及ぼす浮力の影響

概要

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An analysis of the effect of buoyancy on a laminar forced convection heat transfer in a horizontal tube is presented. The heating condition is a uniform heat flux at the tube wall along the tube and around the circumference. The fluid flow is assumed to be hydrodynamically and thermally fully developed and the resulting partial differential equations are solved by the perturbation method. The velocity, temperature and average Nusselt numbers obtained from the perturbation method are compared with available experimental data. The comparison shows that the analytical perturbation solution, where the terms are taken up to a second order approximation, should be modified to satisfactorily represent the behaviors of velocity and temperature data. The modified solutions for the velocity, temperature and average Nusselt numbers are also presented.
長崎大学工学部,Faculty of Engineering, Nagasaki Universityの論文