1990
DOI: 10.1016/0029-5493(90)90017-r
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Two-phase flow characteristic of inverted bubbly, slug and annular flow in post-critical heat flux region

Abstract: Inverted annular flow can be visualized as a liquid jet-like core surrounded by a vapor annulus. While many analytical and experimental studies of heat transfer in this regime have been performed, there is very little understanding of the basic hydrodynamics of the post-CHF flow field. However, a recent experimental study was done that was able to successfully investigate the effects of various steady-state inlet flow parameters on the post-CHF hydrodynamics of the film boiling of a single phase liquid jet. Th… Show more

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Cited by 18 publications
(4 citation statements)
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“…A visualization study of film boiling during transient quenching, by introducing Freon 113 into the bottom of a heated quartz test section, was carded out. It has been established that the axial flow pattern in this study consists basically of three regions, namely, rough wavy, agitated, and dispersed droplet/ligament, in agreement with the flow field observed in the steady-state, two-phase core injection experiment [31].…”
Section: Discussionsupporting
confidence: 84%
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“…A visualization study of film boiling during transient quenching, by introducing Freon 113 into the bottom of a heated quartz test section, was carded out. It has been established that the axial flow pattern in this study consists basically of three regions, namely, rough wavy, agitated, and dispersed droplet/ligament, in agreement with the flow field observed in the steady-state, two-phase core injection experiment [31].…”
Section: Discussionsupporting
confidence: 84%
“…In the present film boiling experimental study, the post-CHF flow regimes were similar to the flow patterns established previously by Ishii and Denten [31 ]. For single-phase liquid core injection, in the steady-state experiment, the post-CHF flow field contained four basic f_w regimes: the smooth regime (stable inverted annular flow), the rough wavy regime, the agitated regime (transition flow between inverted annular and dispersed droplet flow), and the dispersed ligament/droplet regime [25].…”
Section: Hydrodynamic Behavior Of the Post-chf Flow Field Isupporting
confidence: 84%
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“…An essential aspect of this is the accurate prediction of quenching time, as once the fuel rods are quenched, they cool to natural convection levels, averting potential fuel meltdown and ensuring safety. Among the complex phenomena during reflooding, saturated film boiling (SFB) [8][9][10], dispersed flow film boiling (DFFB) [11,12], and inverted annular film boiling (IAFB) [13,14] play a pivotal role. Understanding these heat transfer processes is crucial for refining predictions and improving reactor safety analysis [15][16][17].…”
Section: Introductionmentioning
confidence: 99%