Interpretation and Correlation of Deviations from a Hydrodynamic Channel Boiling Theory of Data on Nitrogen and Hydrogen in Forced and Free Flow Boiling

Abstract

Although the rigorous hydrodynamic theories of channel boiling [¹] and of pool boiling [²] were published in the same year, the latter has subsequently been thoroughly discussed and documented [^3–5] while the former has not: Only three groups [^1,6,7] have compared the channel boiling theory with adequate experiments and two of these are said to be in serious conflict. It is a purpose of this presentation to point out that this disagreement can be resolved if correct values of vapor density are used in the calculations. A second purpose is to add further support for the theory by a comparison with the more recent and extensive hydrogen forced flow film boiling data of Hendricks et al.[⁸]. The fit of data on boiling helium is discussed elsewhere [⁹]. Many studies [^10–12] of boiling of other cryogens lack data on increase in quality or pressure drop or other information needed for a direct comparison with the hydrodynamic theory.