Film boiling from a partly submerged sphere

Marschall, E.; Farrar, L.C.

doi:10.1016/0017-9310(75)90178-7

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…We have carried out hundreds of quenching tests with spheres (Hwalek, 1982; Irving and Westwater, 1986;Zinn, 1984) using 5 metals (Cu, Al, Zn, Pb, Bi) of 6 diameters (0.635-10.16 cm), in vessels of 12 diameters (0.76-40.6 cm), with liquid nitrogen, Freon 12, Freon 22, and helium at atmospheric pressure. Boiling and Eggen (1971), Frederking et al (1964), Frederking and Daniels (1966), Grigoryev et al (1982), Hendricks and Baumeister (1970), Shair (1970a, 1970b), Lewis et al (1965), Manson (1966), Marschall and Farrar (1975), Merte and Clark (1964), Orozco and Witte (1984), Paschkis (1956Paschkis ( ,1958, Paschkis and Stolz (1956), Rezakhany and El-Wakil (1984), Nevins (1968,1969), Sankaran and Witte (1985), Schmidt and Witte (1972), Shih and El-Wakil (1981), Stevens and Witte (1971,1973), Stolz et al (159), Toda and Mori (1982), Ungar and Eichhorn (1982), Veres and Florschuetz (1971), Vliet and Leppert (1961), Walford (1969), Witte (1968aWitte ( , 1968b, and Witte et al (1968). Theoretical treatments are reported by 10 others: Ded and Lienhard (1972), Farahat and Nasr (1978), Fodemski and Hall (1982), Frederking and Clark (1962), Gunnerson and Cronenberg (1980),…”

Section: Spheresmentioning

confidence: 99%

Suggested standard method for obtaining boiling curves by quenching

Westwater¹,

Hwalek²,

Irving³

1986

Ind. Eng. Chem. Fund.

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Boiling curves, representing the heat flux vs. the temperature-difference driving force, can be computed from unsteady-state quenching tests. An inverse conduction calculation is used. For spheres and horizontal flat plates, the geometry and test conditions required to achieve boiling curves, which are equivalent to those obtained by steady-state tests and which are not sensitive to modest changes in geometry, are described. Such curves are useful for the design of commercial heat exchangers. A significant parameter for standardization is the Taylor hydrodynamic wavelength, or alternatively the bubble size at break-off.

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Section: Spheresmentioning

confidence: 99%

Suggested standard method for obtaining boiling curves by quenching

Westwater¹,

Hwalek²,

Irving³

1986

Ind. Eng. Chem. Fund.

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Heat transfer—a review of 1975 literature

Eckert

Sparrow

Goldstein

et al. 1976

International Journal of Heat and Mass Transfer

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Modeling the Effect of the Leidenfrost Vapor Coat Behavior on the Vitrification in Micro-Droplets Using the Cryogenic Droplet Levitation Time

Katkov¹,

Bolyukh

Yakhnenko³

2013

Volume 8A: Heat Transfer and Thermal Engineering

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The levitation (“hovering”) of a liquid droplet on the surface of the coolant such as liquid nitrogen (LN2) is a useful model for studying the Leidenfrost effecr (LFE), that is formation of a vapor film of boiling coolant around the surface of a relative,ly hotter sample, at cryogenic temperatures. Several models of the cryogenic droplet levitation (CDL) have been proposed but no experimental verifications had been proposed for this model in earlier papers. Utkan Demirci’s group has recently developed fast ice-free cooling (vitrification) of microdroplets formed by an ink-jet printer. The group proposed a combination of a theoretical model of film boiling on a hot sphere with the zone theory of non-isothermal kinetic ice propagation within an initially liquid levitating droplet, and they gave theoretical predictions and experimental evaluations of the CDL (Leidenfrost) time tLF of droplets hovering on the surface of LN2 [6]. Here, we report our own experiment results of verification of the data and predictions reported in [6] and describe a thermodynamical model that for elucidating the fate of the levitating droplets. This model adequately explains our experimental results on measuring tLF but almost predicts somewhat 4-fold departure from the numbers claimed by Demirci’s group. We also discuss possible flaws of the model and, especially, experimental claims presented in [6].

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Film boiling from a partly submerged sphere

Cited by 3 publications

References 3 publications

Suggested standard method for obtaining boiling curves by quenching

Suggested standard method for obtaining boiling curves by quenching

Heat transfer—a review of 1975 literature

Modeling the Effect of the Leidenfrost Vapor Coat Behavior on the Vitrification in Micro-Droplets Using the Cryogenic Droplet Levitation Time

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