departure from nucleate boiling
Analysis of departure from nucleate boiling in bundle using a subchannel analysis code
... the departure from nucleate boiling has a particular importance in reactor core of a nuclear power plant system since the phenomenon itself can indicate the soundness of the nuclear fuel ...
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Response of heating rod in water pool for predicting critical heat flux (CHF)
... paramount from consideration of reactor core thermal hydraulics and ensuring fuel pin cladding ...of departure from nucleate boiling (DNB) and in determination of ...Pool boiling ...
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Austempering processes via cold liquids
... its boiling point as shown in Fig. 1. By elevating boiling point of a salt solution, it is possible to delay completely martensite transformation if martensite start temperature Ms and boiling point ...
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Nucleate boiling performance on nano/microstructures with different wetting surfaces
... to nucleate a bubble is less for a hydrophobic surface than for a hydrophilic sur- face ...the departure of bubbles from the sur- face) since it has a larger contact area with the bubble base than ...
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A REVIEW OF RECENT PROGRESS ON NANO/MICRO SCALE NUCLEATE BOILING FUNDAMENTALS
... transfer from the thin unsteady thermal boundary layer near the rapidly growing bubble can be larger than that from the ...of nucleate boiling in three-dimensions using the Level Contour ...
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WRL 90 9 pdf
... pool boiling of water at low pressure are much different from pool boil- ing at atmospheric ...liquids boiling at subatmospheric pressures ...saturated nucleate pool boiling of water at ...
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ONSET OF NUCLEATE BOILING IN MINI AND MICROCHANNELS: A BRIEF REVIEW
... bubble departure diameters were within 19 to 47 μm and correlated by the modified Levy's model (1967) fairly well, suggesting that the bubble departure was governed by the balance of drag and surface ...
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Electric field effects during nucleate boiling from an artificial nucleation site
... mechanisms which has been discounted as inertial influences. Subsequent to bubble departure the free bubble rises in the bulk liquid in a straight path until a peak velocity is reached. After this point the bubble ...
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A Mechanistic Model of Vapour Bubble Departure in Forced Convection Boiling
... Nucleate boiling and two-phase flow behaviour have been studied for ...two-phase boiling flow behaviour is of significant interest for the safe operation of boiling water reactors (BWRs), and ...
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EXPERIMENTAL STUDY OF ENHANCED NUCLEATE BOILING HEAT TRANSFER ON UNIFORM AND MODULATED POROUS STRUCTURES
... sintered from the copper microparticles with a ...observed from the photographic images and experimental data shown in ...vapor departure velocity and a very short retention ...
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Large Eddy & Interface Simulation (LEIS) of disturbance waves and heat transfer in annular flows
... wave characteristics (peak amplitude, substrate thickness and wave length) were comparable to those for the typical disturbance waves [2], in which the maximum film thickness is about five times the substrate thickness ...
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Bubble growth dynamics in nucleate pool boiling with liquid subcooling effects
... f nucleate pool boiling w ith constant wall tem peratures to investigate single bubbles growing in saturated ...obtained from those ...derived from the ratio of the corresponding latent heat ...
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A study of nucleate boiling heat transfer over a horizontal rotating cylinder.
... face combinations during boiling for a stationary cylinder oriented at different positions. Generally the heat trans fer coefficient for the bottom of the cylinder was slightly better than that at the top. The ...
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The effect of quenchant characteristics on the generation of thermal stress and strain in steel plates
... The residual strains suggested by Figs. 117 - 125 refer to the values obtained as a consequence of a quench from 850°C. However, the experimental values with which they are to be compared in the discussion, were ...
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Fundamental issues, technology development and challenges of boiling heat transfer, critical heat flux and two phase flow phenomena with nanofluids
... the nucleate boiling heat transfer and CHF phenomena in pool boiling are summarized and analyzed ...instance, nucleate pool boiling data are often measured with about 20-30% errors and ...
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Pool boiling of ethanol and FC-72 on open microchannel surfaces
... the boiling liquid, under the specimen and in the ...and boiling heat transfer coefficient were related to the level of the micro-fins ...determined from the temperature gradient in the upper part of ...
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First testing experiments with measurement of pool boiling heat transfer coefficient on a new apparatus
... There are a lot of heat transfer correlations, which can be used to estimate heat-transfer coe ffi cient α during sat- urated nucleate pool boiling. They are based on di ff er- ent (often contradictory) ...
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Enhancement of critical heat flux in nucleate boiling of nanofluids: a state of art review
... during nucleate boiling of nanofluids? Kim et ...during nucleate boiling in nanofluids, but was not caused by gravitational sedimentation or single-phase natural ...a boiling surface, ...
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Velocity-Field Measurements Around an Isolated Vapour Bubble Over an Artificially Produced Nucleation Site Using the Particle Image Velocimetry Technique
... the boiling surface (spatio-temporal distribution, wettability, size and shape of potential nucleation sites) and it is additionally unknown in the process of bubble ...removal from an upward-facing ...
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Concerning The Effect of Surface Material on Nucleate Boiling Heat Transfer of R 113
... pool boiling regimes, much research have been carried ...the boiling proc- ess depends on thermophysical properties of the sur- face, interactions between the solid surface, liquid and vapor, and surface ...
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