Abstract
The two-dimensional, steady, pool film boiling heat transfer from a horizontal circular plate facing downward to a stagnant saturated liquid is studied theoretically on the basis of the assumption that the liquid-vapor interface is smooth and radiation can be disregarded. The relevant governing equations for the vapor film are solved for water at atmospheric pressure using two-equation boundary-layer integral method. It is shown that the dimensionless temperature profile is affected by the wall superheat ΔTsat and that a ratio of Nu to X0.2 an increasing function of ΔTsat. Here, Nu represents the mean Nusselt number and X the film-boiling Rayleigh number. In addition, it is revealed that one-equation boundary-layer integral method developed by Nishio et al. is fairly accurate in predicting the film thickness, the representative radial velocity and the mean Nusselt number.
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