The dependence of boiling heat transfer on the properties and geometric parameters of heat-transfer wall

Gogonin, I. I.

doi:10.1007/s10740-006-0110-3

Cited by 27 publications

(8 citation statements)

References 10 publications

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“…The heat transfer coefficients were calculated for the zone of nucleate boiling of the single-component and non-azeotropic mixtures by dependences of Kutateladze (1961) [7], Cooper (1984) [8], and Gogonin (2006) [9]. The heat transfer coefficient, calculated by the Gogonin's dependence, which takes into account the effect of thermal-physical properties of the wall and its roughness on heat transfer, coincides well with the experimental data (Fig.1 + 25% -25% Figure 1.…”

Section: Determination Of Heat Transfer Coefficient At Nucleate Boilisupporting

confidence: 73%

Nucleate boiling at the forced flow of binary non-azeotropic mixtures in horizontal tubes

Mezentseva

Mezentsev

Meleshkin

2015

MATEC Web of Conferences

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Section: Determination Of Heat Transfer Coefficient At Nucleate Boilisupporting

confidence: 73%

Nucleate boiling at the forced flow of binary non-azeotropic mixtures in horizontal tubes

Mezentseva

Mezentsev

Meleshkin

2015

MATEC Web of Conferences

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“…It is interesting to note that the presented dependences ( 7) and ( 8) are close in their form to the criterion dependences used to describe heat transfer during nucleate pool boiling (without taking into account the effect of the properties of heat exchange surface) [51]. In particular, in [52], based on the large dataset generalization, the following dependence was obtained:…”

Section: Heat Transfer Ratesupporting

confidence: 58%

“…For analysis, the models of Mudawar, Valentine [49], and Rybicki and Mudawar [50] were selected, which have the corresponding forms: Nu = 2.512Re 0.76 s Pr 0.56 f , It is interesting to note that the presented dependences ( 7) and ( 8) are close in their form to the criterion dependences used to describe heat transfer during nucleate pool boiling (without taking into account the effect of the properties of heat exchange surface) [51]. In particular, in [52], based on the large dataset generalization, the following dependence was obtained: In these models, mean volumetric flux on a surface (Q") and Sauter mean diameter (d 32 ) are used as characteristic scales of velocity and length, respectively:…”

Section: Heat Transfer Ratementioning

confidence: 99%

The Simultaneous Analysis of Droplets’ Impacts and Heat Transfer during Water Spray Cooling Using a Transparent Heater

Serdyukov

Miskiv

Surtaev

2021

Water

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This paper demonstrates the advantages and prospects of transparent design of the heating surface for the simultaneous study of the hydrodynamic and thermal characteristics of spray cooling. It was shown that the high-speed recording from the reverse side of such heater allows to identify individual droplets before their impact on the forming liquid film, which makes it possible to measure their sizes with high spatial resolution. In addition, such format enables one to estimate the number of droplets falling onto the impact surface and to study the features of the interface evolution during the droplets’ impacts. In particular, the experiments showed various possible scenarios for this interaction, such as the formation of small-scale capillary waves during impacts of small droplets, as well as the appearance of “craters” and splashing crowns in the case of large ones. Moreover, the unsteady temperature field during spray cooling in regimes without boiling was investigated using high-speed infrared thermography. Based on the obtained data, the intensity of heat transfer during spray cooling for various liquid flow rates and heat fluxes was analyzed. It was shown that, for the studied regimes, the heat transfer coefficient weakly depends on the heat flux density and is primarily determined by the flow rate. In addition, the comparison of the processes of spray cooling and nucleate boiling was made, and an analogy was shown in the mechanisms that determine their intensity of heat transfer.

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“…There are many factors that influence the nucleate boiling. The nucleate boiling behavior is determined by RMS 10 , 11 and wall surface topology (fractal dimension) 12 . The structured surface may both increase and decrease the wettability and the heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Evaporation of a sessile water drop and a drop of aqueous salt solution

Misyura

2017

Sci Rep

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The influence of various factors on the evaporation of drops of water and aqueous salt solution has been experimentally studied. Typically, in the studies of drop evaporation, only the diffusive vapor transfer, radiation and the molecular heat conduction are taken into account. However, vapor-gas convection plays an important role at droplet evaporation. In the absence of droplet boiling, the influence of gas convection turns out to be the prevailing factor. At nucleate boiling, a prevailing role is played by bubbles generation and vapor jet discharge at a bubble collapse. The gas convection behavior for water and aqueous salt solution is substantially different. With a growth of salt concentration over time, the influence of the convective component first increases, reaches an extremum and then significantly decreases. At nucleate boiling in a salt solution it is incorrect to simulate the droplet evaporation and the heat transfer in quasi-stationary approximation. The evaporation at nucleate boiling in a liquid drop is divided into several characteristic time intervals. Each of these intervals is characterized by a noticeable change in both the evaporation rate and the convection role.

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The dependence of boiling heat transfer on the properties and geometric parameters of heat-transfer wall

Cited by 27 publications

References 10 publications

Nucleate boiling at the forced flow of binary non-azeotropic mixtures in horizontal tubes

Nucleate boiling at the forced flow of binary non-azeotropic mixtures in horizontal tubes

The Simultaneous Analysis of Droplets’ Impacts and Heat Transfer during Water Spray Cooling Using a Transparent Heater

Evaporation of a sessile water drop and a drop of aqueous salt solution

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