固体粗粒子を含む円管内上昇液流の伝熱

概要

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Heat transfer characteristics of solid-liquid mixtures in vertical upward flow were investigated experimentally. The water with suspending spherical glass beads (0.06-1.0mm in diameter) and ion exchange resin (0.5 mm in diameter) passed through copper tubes (12.8 and 19.0 mm in diameter), and were heated by hot water flowing through the jacket around the pipe wall. In these experiments, Re number ranged from 1000 to 20000 and delivered volumetric solid concentrations were up to 0.1. As the results, the following conclusions can be obtained; (1) Temperature profiles of solid-liquid mixtures at the outlet of test section were almost the same as those of water at large Re. but were entirely different from those of water alone at small Re. (2) The relationships between Nu number and Re number were illustrated by an S-curve on logarithmic graph paper.
1981-01-20