液体金属の水平円管内自然・強制複合対流の数値解析

概要

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Numerical analysis has been conducted for combined free and forced laminar convection of liquid metals in a horizontal pipe which is isothermally heated from a certain axial location. The steady-state solutions have been obtained in consideration of axial conduction for Peclet numbers of 0.3〜7.5 and Rayleigh numbers of 15〜500. The results reveal marked effects of axial conduction on the flow and heat transfer characteristics of liquid metals. At the entrance to the heated section, the secondary flow has already developed and a reverse flow occurs near the pipe top as the buoyancy effect becomes large. Consequently, the circumferential average Nusselt number decreases with increasing secondary flow in comparison with that observed in moderate and large Prandtl-number flows. The regime of reverse flow is clearly identified in the Pe-Ra coordinates.
一般社団法人日本機械学会の論文
1992-11-25