Heat Transfer in Stable Film Boiling
01 Jan 1949-
About: The article was published on 1949-01-01 and is currently open access. It has received 393 citations till now. The article focuses on the topics: Nucleate boiling & Heat transfer coefficient.
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TL;DR: In this paper, a review examines recent advances made in predicting boiling heat fluxes, including some key results from the past, including nucleate boiling, maximum heat flux, transition boiling, and film boiling.
Abstract: ▪ Abstract This review examines recent advances made in predicting boiling heat fluxes, including some key results from the past. The topics covered are nucleate boiling, maximum heat flux, transition boiling, and film boiling. The review focuses on pool boiling of pure liquids, but flow boiling is also discussed briefly.
575 citations
TL;DR: In this paper, heat transfer measurements taken at atmospheric pressure in silica nano-solutions are compared to similar measurements taken in pure water and silica micro-solution, and the data include heat flux vs. superheat of a 0.4 mm diameter NiCr wire submerged in each solution, showing a marked increase in critical heat flux (CHF) for both nano- and micro-Solutions compared to water, but no appreciable differences in heat transfer for powers less than CHF.
519 citations
TL;DR: In this paper, double enhancement was used for pool boiling from heater surfaces simulating microelectronic devices immersed in saturated FC-72 at atmospheric pressure, and the results showed significant increases in nucleate boiling heat transfer coefficients with the application of the microporous coating to the heater surfaces.
Abstract: The present research is an experimental study of double enhancement behavior in pool boiling from heater surfaces simulating microelectronic devices immersed in saturated FC-72 at atmospheric pressure. The term double enhancement refers to the combination of two different enhancement techniques: a large-scale area enhancement (square pin fin array) and a small-scale surface enhancement (microporous coating). Fin lengths were varied from 0 (flat surface) to 8 mm. Effects of this double enhancement technique on critical heat flux (CHF) and nucleate boiling heat transfer in the horizontal orientation (fins are vertical) are investigated. Results showed significant increases in nucleate boiling heat transfer coefficients with the application of the microporous coating to the heater surfaces. CHF was found to be relatively insensitive to surface microstructure for the finned surfaces except in the case of the surface with 8-mm-long fins. The nucleate boiling and CHF behavior has been found to he the result of multiple, counteracting mechanisms: surface area enhancement, fin efficiency, surface microstructure (active nucleation site density), vapor bubble departure resistance, and re-wetting liquid flow resistance
212 citations
TL;DR: In this paper, the authors provide a comprehensive review and analysis of the current knowledge base on nucleate boiling heat transfer and on the critical (maximum) heat flux in impinging jet systems.
Abstract: Publisher Summary Impinging liquid jets have found usage in many industrial applications, in both submerged (liquid-into-liquid) and free-surface (liquid-into-gas) arrangements. Because of the attractiveness of jet impingement cooling for high-heat-flux applications, numerous studies have been performed for both single- and two-phase conditions. This statement is particularly true for jet impingement boiling, that is distinguished by its ability to dissipate heat fluxes at the high end of the cooling spectrum. This chapter addresses liquid jets with continuous cross sections, thereby excluding spray and droplet impingement studies. Throughout this chapter, jet configurations are delineated into five categories of free-surface jets, plunging jets, submerged jets, confined jets, and wall jets. This chapter attempts to provide a comprehensive review and analysis of the current knowledge base on nucleate boiling heat transfer and on the critical (maximum) heat flux in impinging jet systems. This chapter addresses jet impingement literature pertinent to the transition and film boiling regime.
189 citations