Heat Transfer Mechanism of the Anti-Gravity Flow on the Surface of Microscale Fluted Horizontal Tubes

摘要

This study focuses on the theories and experiments of the anti-gravity flow on the surface of microscale fluted horizontal tubes. Under the orthogonal curvilinear coordinate system, the heat formula of evaporation of the rising liquid film has been acquired based on numerical simulation of the velocity distribution and film thickness. A convectional test bed was established for investigating the behavior of a rising liquid film on the surface of a fluted horizontal tube; the circumferential distribution of the heat transfer coefficient has been obtained; experimental results about the convective heat transfer coefficient with different heating rates or reinforcement measures were also analyzed. The results indicate that the anti-gravity rising liquid film has good heat transfer performance.