Historical Note on Recalescence

Barrett, W. F.

doi:10.1038/085235e0

Cited by 3 publications

(3 citation statements)

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“…2b), the drop temperature immediately increases from 𝑇 𝑓 to the melting point of ice (i.e., 𝑇 𝑚 = 0 ℃, bottom panel in Fig. 2b) due to the occurrence of recalescence 15,17 . Recalescent freezing is a kinetic crystallization process during which a dendritic ice network forms in the supercooled drop 26 , turning it into a mixture of liquid water and ice crystals; additionally, the latent heat released from the phase change causes a sharp temperature rise in the drop and by heat transfer also of its nearby region (bottom panel of Fig.…”

Section: Halo Pattern Formation Growth and Fading In Dropwise Condens...mentioning

confidence: 97%

“…When the surface temperature is lowered to the supercooling regime, the condensed water drops start solidifying; first, ice dendrites nucleate and grow rapidly inside one of them, releasing enough latent heat from solidification to warm the drop to approximately 0 ℃ 5,6 . This sudden spontaneous heating is referred to as recalescence 17 and is followed by a slower freezing process in which the entire drop solidifies from its bottom to its top (B-T freezing) 18 . The frozen drop then becomes the initiating site for ice propagation, which occurs by growing ice bridges towards neighboring drops that are still liquid and feed the ice bridges via their vapor 19,20 .…”

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Condensate Halos in Condensation Frosting

Bonaccurso,

Chen,

Zhen

et al. 2024

Preprint

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The freezing of water drops on cold solid surfaces is ubiquitous in nature and has broad implications for industrial processes and applications, causing serious technological, engineering and economic issues. Understanding the physics of drop freezing is not only fundamental and practical but also a prerequisite and basis for developing ice protection and control strategies. Despite longstanding and numerous research efforts, existing knowledge on drop freezing is still limited, as evidenced by the continuous exploration and discovery of new icing phenomena or effects. One such is that, along with the freezing of a supercooled water drop in a dry or/and low-pressure environment, an explosive vapor is emitted to its surrounding space; this vapor can either generate a condensate halo consisting of small drops that further freeze into frost or directly desublimate into ice crystals, promoting ice propagation among the drop clusters deposited on the surface. Here, we extend previous carefully designed experimental studies on the freezing of supercooled drops on solid surfaces under low humidity and pressure to condensation frosting under standard laboratory conditions. Condensate halos were observed to form, grow and eventually disappear in a well-defined “fence” region around freezing drops during condensation frosting also at ambient humidity and pressure on sufficiently hydrophobic surfaces with low thermal conductivities. The evolution of the halo pattern involved multiphase transitions on timescales from milliseconds to seconds. By combining optical and thermal imaging techniques, we assessed the halo characteristics at each stage and elucidated the main underlying heat and mass transfer mechanisms. Our work further advances the physical understanding of complex dropwise freezing processes, and relevant findings can provide guidance for optimizing deicing and defrosting strategies.

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Section: Halo Pattern Formation Growth and Fading In Dropwise Condens...mentioning

confidence: 97%

mentioning

confidence: 99%

Condensate Halos in Condensation Frosting

Bonaccurso,

Chen,

Zhen

et al. 2024

Preprint

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“…The arrest in the cooling curve of iron has been known in the industry for a very long time, attributed to heat conduction from inside of the object. From 1873 to 1910, Barrett conducted a systematic investigation [1][2][3], and proved that it was actually due to the heat release from transformation. He named this phenomenon as 'recalescence'.…”

Section: Introductionmentioning

confidence: 99%

Modelling of recalescence effect on austenite decomposition

Guo

Roelofs

Lembke³

et al. 2017

Materials Science and Technology

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A model for recalescence has been established by integrating a model for the decomposition of austenite and one dealing with heat transfer with latent heat release taken into account. The e ects of recalescence on each individual austenite transformation product has been studied. It was found that Widmanstätten ferrite and pearlite reactions are most a ected. The calculated cooling curve as a ected by the recalescence has also been verified with a commercial steel subjected to two di erent environment conditions.

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The recalescence rate of cooling curve for undercooled solidification

Yang

Wang

et al. 2020

Sci Rep

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Recalescence rate (R) in cooling curve is well known that affected by undercooling in solidification, but the accurate relationship of them is not clear yet. In this paper, based on the undercooled solidification of Fe-B alloy, the factor affected on recalescence process was investigated. The relationship R = VΔT/D was first found, where V is the growth velocity, ΔT the recalescence degree (approximate the undercooling), D the focus region diameter dependent on the distance of the pyrometer. With this result the solidification interface growth velocity can be predicted from recalescence of cooling curve, vice versa. In addition, an approximate relation between growth velocity and the size of the critical nucleus was shown.

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Historical Note on Recalescence

Cited by 3 publications

References 1 publication

Condensate Halos in Condensation Frosting

Condensate Halos in Condensation Frosting

Modelling of recalescence effect on austenite decomposition

The recalescence rate of cooling curve for undercooled solidification

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