Numerical investigations of six-fold dendritic icing process in subcooled water subject to natural and forced convective environments

Guo, Qingjie; Cheng, Ping

doi:10.1016/j.ijheatmasstransfer.2019.118658

Cited by 14 publications

(1 citation statement)

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“…To explain why the surface orientation has such a strong impact on the growth of ice dendrites atop a frozen drop, the problem is simplified to the deposition of water vapor on the ice-air interface. Note that we neglect the intrinsic anisotropic dendrite growth due to the molecule structure of ice [38], and instead only focus on mass transfer in the gaseous phase. As shown in Figure 6a, the physics is formulated into a binary (i.e., water vapor in the air) diffusion problem under natural convection conditions.…”

Section: Resultsmentioning

confidence: 99%

Ice Dendrite Growth Atop a Frozen Drop under Natural Convection Conditions

Huang

Zhao

2022

Crystals

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Condensation frosting is a type of icing encountered ubiquitously in our daily lives. Understanding the dynamics of condensation frosting is essential in developing effective technologies to suppress frost accretions that compromise heat transfer and system integrity. Here, we present an experimental study on ice dendrite growth atop a single frozen drop, an important step affecting the subsequent frosting process, and the properties of fully-developed frost layers. We evaluate the effect of natural convection by comparing the growth dynamics of ice dendrites on the surface of a frozen drop with three different orientations with respect to gravity. The results show that both the average deposition rate and its spatial variations are profoundly altered by surface orientations. Such behavior is confirmed by a numerical simulation, showing how gravity-assisted (hindered) vapor diffusion yields the deposition outcomes. These findings benefit the optimization of anti-/de- frosting technologies and the rational design of heat exchangers.

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Section: Resultsmentioning

confidence: 99%