Rupture of a subcooled liquid film falling down a heated grooved surface

Abstract

This paper presents an experimental study of rupture of a subcooled water film falling down an 1 m long heated copper plate with longitudinal grooves of 0.5×0.15 mm² cross sectional area and 2 mm spacing. It was found that the threshold heat flux at which an initial stable dry patch forms on the grooved surface is about two times higher than that on a smooth surface. Furthermore, the grooves prevent dry patches from spreading over the total heated surface thus essentially delaying the onset of the heat transfer crisis. The main governing parameters of the experiment and their respective values are: initial film temperature (20-95°C), heat flux (0-1.26 W/cm²) and volumetric flow rate (11.1-38.2 l/h) (Re=56.2-653.2).

Original language	English
Pages (from-to)	71-74
Number of pages	4
Journal	Microgravity Science and Technology
Volume	19
Issue number	3-4
DOIs	https://doi.org/10.1007/BF02915756
Publication status	Published - 1 Jan 2007

ASJC Scopus subject areas

Modelling and Simulation
Engineering(all)
Physics and Astronomy(all)
Applied Mathematics

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10.1007/BF02915756

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title = "Rupture of a subcooled liquid film falling down a heated grooved surface",

abstract = "This paper presents an experimental study of rupture of a subcooled water film falling down an 1 m long heated copper plate with longitudinal grooves of 0.5×0.15 mm2 cross sectional area and 2 mm spacing. It was found that the threshold heat flux at which an initial stable dry patch forms on the grooved surface is about two times higher than that on a smooth surface. Furthermore, the grooves prevent dry patches from spreading over the total heated surface thus essentially delaying the onset of the heat transfer crisis. The main governing parameters of the experiment and their respective values are: initial film temperature (20-95°C), heat flux (0-1.26 W/cm2) and volumetric flow rate (11.1-38.2 l/h) (Re=56.2-653.2).",

author = "Zaitsev, {D. V.} and Aviles, {M. Lozano} and H. Auracher and Kabov, {O. A.}",

year = "2007",

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doi = "10.1007/BF02915756",

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journal = "Microgravity Science and Technology",

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T1 - Rupture of a subcooled liquid film falling down a heated grooved surface

AU - Zaitsev, D. V.

AU - Aviles, M. Lozano

AU - Auracher, H.

AU - Kabov, O. A.

PY - 2007/1/1

Y1 - 2007/1/1

N2 - This paper presents an experimental study of rupture of a subcooled water film falling down an 1 m long heated copper plate with longitudinal grooves of 0.5×0.15 mm2 cross sectional area and 2 mm spacing. It was found that the threshold heat flux at which an initial stable dry patch forms on the grooved surface is about two times higher than that on a smooth surface. Furthermore, the grooves prevent dry patches from spreading over the total heated surface thus essentially delaying the onset of the heat transfer crisis. The main governing parameters of the experiment and their respective values are: initial film temperature (20-95°C), heat flux (0-1.26 W/cm2) and volumetric flow rate (11.1-38.2 l/h) (Re=56.2-653.2).

AB - This paper presents an experimental study of rupture of a subcooled water film falling down an 1 m long heated copper plate with longitudinal grooves of 0.5×0.15 mm2 cross sectional area and 2 mm spacing. It was found that the threshold heat flux at which an initial stable dry patch forms on the grooved surface is about two times higher than that on a smooth surface. Furthermore, the grooves prevent dry patches from spreading over the total heated surface thus essentially delaying the onset of the heat transfer crisis. The main governing parameters of the experiment and their respective values are: initial film temperature (20-95°C), heat flux (0-1.26 W/cm2) and volumetric flow rate (11.1-38.2 l/h) (Re=56.2-653.2).

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