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Stability Criterion of a Rotating Fluid Film in the Post-Dryout Region of Swirling Flow Boiling
The paper considers the fragmentation of fluid films and, in particular, the used similarity numbers that characterize the process of fragmentation....
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Flow Boiling Crisis and Post Dryout Heat Transfer
In the previous chapter, we have discussed various modes of flow boiling such as subcooled, saturated or convective boiling. We also indicated that...
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Pressure dependence of dryout in a heat-generating porous debris bed
The primary objective of this work is to numerically study the effect of system pressure on the occurrence of dryout phenomena in heap-shaped,...
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Critical Heat Flux and Dryout
The critical heat flux (CHF) was briefly introduced in Chap. 5 , and in the present chapter, the analyses...
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Crisis Phenomena and Heat-Transfer Enhancement during Boling and Evaporation in Horizontal Liquid Films (Review)
AbstractA brief review is presented of studies in the field of heat-transfer enhancement and for increasing the critical heat fluxes (CHFs) during...
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Effects of tube shape on the distribution of film thickness and heat transfer performance in falling film evaporation
The evaporative condenser has broad application prospects because of its high heat transfer efficiency. In order to explore the effect of tube shape...
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Pool Boiling Crisis, Critical Heat Flux and Film Boiling
In Chap. 6, we have seen that during nucleate boiling the heat flux increases with wall superheat. However, the Nukiyama curve (Fig. 6.9) clearly...
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Experimental investigation of the heat transfer characteristics, operating limits, and temperature distribution of a prototypically 3 m long two-phase closed thermosyphon for spent fuel pool passive cooling
The current study investigated the heat transfer performance, operation limits, and temperature distribution of a 3 m prototype model for a...
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Examination of two-phase behaviors in porous media during pool boiling
The enhancement of pool boiling heat transfer using porous media has been extensively studied. Although the two-phase distribution and evolution in...
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Boiling in Forced Convection of Subcooled Liquid as a Method for Removing High Heat Fluxes (Review): Part 2. Critical Heat Fluxes and Heat-Transfer Enhancement
AbstractThe article is the second part of the review devoted to the boiling of a liquid subcooled to the saturation temperature, the process which...
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Heat and mass transfer of countercurrent air-water flow in a vertical tube
The paper deals with the classification and the design features of direct contact heat exchangers used in various technological processes. It...
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Boiling in Forced Convection of Subcooled Liquid as a Method for Removing High Heat Fluxes (Review): Part 1. Characteristics, Mechanism, and Model of the Process, Heat Transfer, and Hydraulic Resistance
AbstractA review of the data on boiling of a liquid at a temperature below the saturation temperature (subcooled liquid) and on the process enabling...
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Parametric analysis on flooding limit and critical film thickness of a vertical two-phase closed thermosyphon
Flooding limit is the most severe limitation in the operation of a two-phase closed thermosyphon (TPCT). However, the effect of condenser length to...
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Flow boiling heat transfer in copper foam fin microchannels with different fin widths using R134a
Heat sinks of copper foam fin microchannels are developed to deal with cooling challenges. The heat sinks consist of fins made of copper foam and...
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CFD Modeling of Critical Heat Flux in Nuclear Fuel Pins
Critical heat flux (CHF) is one of the major safety limits in the nuclear power plant operation. Determining CHF for rod bundles at all operating...
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Condensation: Nusselt Theory and External Condensation
Condensation is the process of changing vapour into liquid. If the temperature of a surface in contact with the vapour is below saturation...
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Entrainment
This chapter briefly presents the entrainment mechanisms and the different correlations used to predict liquid entrainment fraction in gas−liquid...
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Flooding Phenomenon of Cryogenic Liquids
Flooding is a phenomenon encountered in exchange flows in pipes. Liquid normally flows down the tube and there is countercurrent gas flowing up, but...
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Heat Loss Analysis of Flow Boiling Experiments Onboard International Space Station with Unclear Thermal Environmental Conditions (2nd Report: Liquid-vapor Two-phase Flow Conditions at Test Section Inlet)
This is the second report on the development of heat loss model for flow boiling experiments conducted onboard International Space Station (ISS). In...
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Boiling in Mini and Microchannels
In this chapter, we look at some special topics which are important during liquid–vapour phase change. These topics are not essential for basic...