加热探头圆柱上的液体微层厚度

LIQUID MICROLAYER THICKNESS ALONG A CYLINDRICAL PROBE

1前言核态沸腾气泡形成时表面存在液体微层。虽然微层很薄，但对加热过程中的传热和气泡的产生具有重要影响。Lay和Dhirl‘］通过更细致的分析微层内的压力分布预言了微层的形状和热流，但考虑的仅是平板上气泡的液体微层。本文考虑了小的加热圆柱探针上气泡层的生长。当?..

Tile thickness of a liquid microlayer underneath a vapor bubble on a heated, cylindrical probe was determined by simultaneously solving the fourth-order differential equation for the microlayer thickness that incorporates the momentum and energy equations in the microlayer in conjunction with the pressure distribution in the mircrolayer and the evaporative heat flux at the interface. The analysis also considers the temperature gradient along the probe due to heat transfer in the probe.The results show that the microlayer on a cylindrical surface is very thin and shork except for very low probe surface temperatures, superheated less than 1 K. The microlayer size and the evaporative heat flux both decrease rapidly as the surface temperature increases.The results show that most of the evaporation occurs along the curved portion of the interface.