Preventing snow accumulating upon inclined substrates using falling water film

B. Song, H. Inaba, Akihiko Horibe

Research output: Contribution to journalArticle

Abstract

This paper has concerned preventing snow accumulating upon inclined substrates using falling water film. A cluster of physical models for a gas-water-snow system was developed and solved with a control-volume finite-difference procedure. The effects of various parameters on heat transfer and water film temperature decrease were investigated. The results revealed that it is feasible to use falling water film to prevent snow accumulation upon inclined substrates as long as the suitable initial film flow rate and temperature are adopted. It was clarified that among the influential factors of water film temperature decrease, the snowfall intensity, initial water film thickness and the substrate inclination play an important role. The intensity of the film temperature decrease mainly depends on the snowfall intensity and the initial heat capacity of the water film flow, which is a function of temperature and mass flow rate. An intensive heat transfer occurs in a very thin layer near the free surface of the water film. The numerical results were correlated in terms of effective Nusselt number, and Reynolds, Prandtl and Gukhman numbers. The maximum deviation of the numerical data from the correlation is approximately 15.6%, which only causes an uncertainty less than 3% in the simple prediction.

Original languageEnglish
Pages (from-to)179-185
Number of pages7
JournalWärme- und Stoffübertragung
Volume36
Issue number3
Publication statusPublished - May 2000

Fingerprint

snow
Snow
falling
Water
Substrates
water
Temperature
heat transfer
temperature
Flow rate
Heat transfer
mass flow rate
Prandtl number
Nusselt number
Specific heat
inclination
Film thickness
film thickness
flow velocity
Gases

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Preventing snow accumulating upon inclined substrates using falling water film. / Song, B.; Inaba, H.; Horibe, Akihiko.

In: Wärme- und Stoffübertragung, Vol. 36, No. 3, 05.2000, p. 179-185.

Research output: Contribution to journalArticle

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