Quantifying the Pathways of Latent Heat Dissipation during Droplet Freezing on Cooled Substrates

Castillo, Julian E.; Huang, Yueting; Zhang, Pan; Weibel, Justin A.

doi:10.1016/j.ijheatmasstransfer.2020.120608

Cited by 29 publications

(18 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These ratios were approximately 0.68 and 0.30, respectively, for the 10.1 µl droplet studied by Castillo et al . [44]. In the present work, these same ratios were nearly 0.60 and 0.36, respectively, for a 2 µl droplet.…”

Section: Resultssupporting

confidence: 74%

“…Looking just at the droplet/air interface, the chosen parameters were the ratio between the convective heat flux and total heat flux, and the ratio between the heat flux related to convective mass transfer and total heat flux, both ratios calculated at the droplet/air interface and at the beginning of the freezing stage. These ratios were approximately 0.68 and 0.30, respectively, for the 10.1 µl droplet studied by Castillo et al [44]. In the present work, these same ratios were nearly 0.60 and 0.36, respectively, for a 2 µl droplet.…”

Section: (C) Parametric Analysissupporting

confidence: 77%

“…Castillo et al . [44] performed a similar theoretical evaluation for heat dissipation rates for the freezing of a droplet resting on a cooled substrate. They estimated the fraction of heat that is lost through the substrate and through the droplet/air interface, either by natural convection or by convective mass transfer, and their analysis has motivated the present comparison.…”

Section: Resultsmentioning

confidence: 99%

“…Quantifying the pathways of heat dissipation, as in figures 4 and 5, is important in assessing the role of each transport mechanism in the freezing process and its influence on the freezing time. Castillo et al [44] performed a similar theoretical evaluation for heat dissipation rates for the freezing of a droplet resting on a cooled substrate. They estimated the fraction of heat that is lost through the substrate and through the droplet/air interface, either by natural convection or by convective mass transfer, and their analysis has motivated the present comparison.…”

Section: (C) Parametric Analysismentioning

confidence: 99%

See 3 more Smart Citations

Hybrid integral transform analysis of supercooled droplets solidification

et al. 2021

View full text Add to dashboard Cite

The freezing phenomena in supercooled liquid droplets are important for many engineering applications. For instance, a theoretical model of this phenomenon can offer insights for tailoring surface coatings and for achieving icephobicity to reduce ice adhesion and accretion. In this work, a mathematical model and hybrid numerical–analytical solutions are developed for the freezing of a supercooled droplet immersed in a cold air stream, subjected to the three main transport phenomena at the interface between the droplet and the surroundings: convective heat transfer, convective mass transfer and thermal radiation. Error-controlled hybrid solutions are obtained through the extension of the generalized integral transform technique to the transient partial differential formulation of this moving boundary heat transfer problem. The nonlinear boundary condition for the interface temperature is directly accounted for by the choice of a nonlinear eigenfunction expansion base. Also, the nonlinear equation of motion for the freezing front is solved together with the ordinary differential system for the integral transformed temperatures. After comparisons of the solution with previously reported numerical and experimental results, the influence of the related physical parameters on the droplet temperatures and freezing time is critically analysed.

show abstract

Section: Resultssupporting

confidence: 74%

Section: (C) Parametric Analysissupporting

confidence: 77%

Section: Resultsmentioning

confidence: 99%

Section: (C) Parametric Analysismentioning

confidence: 99%

See 2 more Smart Citations

Hybrid integral transform analysis of supercooled droplets solidification

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Different from conventional module gears, small module gears have smaller specific surface area and smaller convection and radiation heat dissipation resistance during cooling. The heat transfer at the interface [ 20 , 21 , 22 , 23 ] during melt molding is complex and changeable, so the uneven heat transfer at various parts of the gear is more obvious. The premise of shrinkage control is to understand the shrinkage characteristics of small module plastic gears.…”

Section: Introductionmentioning

confidence: 99%

A Practical Numerical Approach to Characterizing Non-Linear Shrinkage and Optimizing Dimensional Deviation of Injection-Molded Small Module Plastic Gears

2021

Polymers

View full text Add to dashboard Cite

This paper was aimed at finding out the solution to the problem of insufficient dimensional accuracy caused by non-linear shrinkage deformation during injection molding of small module plastic gears. A practical numerical approach was proposed to characterize the non-linear shrinkage and optimize the dimensional deviation of the small module plastic gears. Specifically, Moldflow analysis was applied to visually simulate the shrinkage process of small module plastic gears during injection molding. A 3D shrinkage gear model was obtained and exported to compare with the designed gear model. After analyzing the non-linear shrinkage characteristics, the dimensional deviation of the addendum circle diameter and root circle diameter was investigated by orthogonal experiments. In the end, a high-speed cooling concept for the mold plate and the gear cavity was proposed to optimize the dimensional deviation. It was confirmed that the cooling rate is the most influential factor on the non-linear shrinkage of the injection-molded small module plastic gears. The dimensional deviation of the addendum circle diameter and the root circle diameter can be reduced by 22.79% and 22.99% with the proposed high-speed cooling concept, respectively.

show abstract

Direct Inkjet 3D Printing Microwires with Small Feature Size by Freezing, Sublimation, and Evaporation Induced Colloidal Nanoparticles Self‐Assembly Mechanism

Guo

Zhao

Qian

et al. 2022

Adv Materials Technologies

View full text Add to dashboard Cite

The feature size (FS) of inkjet printing is limited by nozzle size and drop spreading, which limits the realization of small optoelectronics devices and 3D microstructures. Some methods can realize small FS, but sacrifice advantages of inkjet technology. For instance, dewetting can reduce FS with all the advantages of inkjet technology kept, but is hard to print wires due to Rayleigh–Plateau instability. To solve these problems, in this paper, freezing and sublimation are introduced to direct inkjet printing wire processes. After optimizing the glycerol amount and adding tert‐butyl alcohol (TBA) in water‐based nanoparticle inks, condensed microwires of PS colloidal nanoparticles, graphene oxide (GO) nanosheets, and silver nanowires (AgNws) with small FS can be printed, respectively, by freezing, sublimation, and evaporation induced nanoparticle self‐assembly (FSE‐INS) mechanism. Using printhead with the nozzle size of 21 µm, the minimum feature size is only ≈2 µm for GO nanosheet samples. The FSE‐INS mechanism shows particle‐dimension dependent structure properties, introduces an additional particle manipulation freedom perpendicular to the substrate with sacrificial vertical solid surfaces, and exhibits great potential to realize small and novel devices and 3D structures, without sacrificing the advantages of inkjet technology.

show abstract

Quantifying the Pathways of Latent Heat Dissipation during Droplet Freezing on Cooled Substrates

Cited by 29 publications

References 48 publications

Hybrid integral transform analysis of supercooled droplets solidification

Hybrid integral transform analysis of supercooled droplets solidification

A Practical Numerical Approach to Characterizing Non-Linear Shrinkage and Optimizing Dimensional Deviation of Injection-Molded Small Module Plastic Gears

Direct Inkjet 3D Printing Microwires with Small Feature Size by Freezing, Sublimation, and Evaporation Induced Colloidal Nanoparticles Self‐Assembly Mechanism

Contact Info

Product

Resources

About