Experimental Study on Frost Structure on Surfaces With Different Hydrophilicity: Density and Thermal Conductivity
Abstract
An experimental study has been conducted to investigate the effects of surface energy on frost formation. Test samples with three different surfaces of which dynamic contact angles (DCA) were 23, 55, and 88 deg were installed in a wind tunnel and exposed to a humid airflow. The airflow Reynolds number, humidity, the air and the cold plate temperatures were maintained at 9000, 0.0042 kg/kg′, +12 and −22°C, respectively. The thickness and the mass of frost layer were measured and used to calculate frost density while heat flux and temperature profile were measured to obtain thermal conductivity. Exact positions of thermocouple junctions were verified by means of visualization system in order to increase accuracy. Results showed that frost density and thermal conductivity increase with time. The surface with a lower DCA showed a higher frost density and thermal conductivity during a two-hour test, but minor differences have been found after two hours of frost generation. Empirical correlations for thickness, mass deposition, density and thermal conductivity were proposed as the functions of test time and surface energy.
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Shin et al. [33] considered that the dynamic contact angle of a cold surface significantly impacted frost density; based on their own experimental data, they presented a simple correlation of average frost density that was only a function of dynamic contact angle and frosting time duration.
“Shin et al. [33] considered that the dy namic contact angle of a cold surface significantly impacted frost den sity. Based on their own experimental data, a simple correlation of average frost density, which was only a function of dynamic contact angle and frosting time duration was presented.”
From Frosting mechanism and behaviors on surfaces with simple geometries: A state-of-the-art literature review (2022) · cites this paper as Shin et al. [33]
Except Shin et al. [33] and Hermes et al. [34], all others ignored cold surface contact angle when developing frost thickness correlations on flat plates.
“except Shin et al. [33] and Hermes et al. [34] who considered cold surface contact angle when developing frost thickness correlations on flat plates, all others ignored cold surface contact angle.”
From Frosting mechanism and behaviors on surfaces with simple geometries: A state-of-the-art literature review (2022) · cites this paper as Shin et al. [33]
Shin et al. [33] indicated that the dynamic contact angle of a cold surface also influenced effective frost thermal conductivity, and presented an empirical correlation that was a function of frost density and the dynamic contact angle of a cold surface.
“Shin et al. ' s [33] indicated that the dynamic contact angle of a cold surface also influenced effective frost thermal conductivity, and pre sented an empirical correlation which was a function of frost density and the dynamic contact angle of a cold surface.”
From Frosting mechanism and behaviors on surfaces with simple geometries: A state-of-the-art literature review (2022) · cites this paper as Shin et al. [33]
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- Authors
- Shin, J., Tikhonov, A. V., & Kim, C.
- Affiliations
- LG (South Korea) (KR)
- DA Research Laboratory, LG Electronics Company, 391-2, Ga Eum Jeong Dong, Changwon, Kyoung Nam, 641-711 Republic of Korea
- ORCID
- Shin, Jongmin
- Venue
- Journal of Heat Transfer
- Publisher
- Wiley
- Published
- 2003-01-29
- Volume
- 125
- Issue
- 1
- Pages
- 84-94
- ISSN
- 0022-1481 (ISSN-L)
- 1528-8943
- OpenAlex
- W2013655609
- Cited by
- 123
- References
- 7
- Citations by year
- 2026: 2 · 2025: 6 · 2024: 7 · 2023: 8 · 2022: 7 · 2021: 3 · 2020: 6 · 2019: 4 · 2018: 14 · 2017: 12 · 2016: 9 · 2015: 4 · 2014: 5 · 2013: 8 · 2012: 6
- FWCI
- 6.76
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- ASME Journal of Heat and Mass Transfer (publishedVersion)
- Topics
- Physical Sciences › Engineering › Aerospace Engineering › Icing and De-icing Technologies
- Physical Sciences › Engineering › Mechanical Engineering › Refrigeration and Air Conditioning Technologies
- Physical Sciences › Engineering › Mechanical Engineering › Heat Transfer and Optimization
- Keywords
- frost formation, frost density, surface hydrophilicity, dynamic contact angle, surface energy, frost thickness, empirical correlations, wind tunnel
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