Investigation of variable thermophysical property problem concerning pool film boiling from vertical plate with prescribed uniform temperature

Abstract

By the development of laminar two-phase boundary-layer analysis on pool film boiling heat transfer, system parameters and their fundamental effect on heat transfer have been disclosed. However theoretically obtained characteristics of heat transfer do not fairly compare with the experimental data, because the relevant thermophysical properties vary significantly across the vapor film, and the nature of flow process is often turbulent and of non-boundary layer. In this investigation an analysis was made on pool film boiling heat transfer from vertical plate of uniform temperature to saturated or subcooled liquid, taking into account temperature variation of all properties, and the significance of variable properties in pool film boiling was examined. By getting solutions for water at the pressure of 1,50,100 and 200 {bar}, effect of variable properties on heat transfer and distribution of velocity and temperature were clarified. The heat-transfer results were compared with the available data of pool film boiling from horizontal cylinder.