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Experimental and numerical investigation of evaporative heat transfer in the vicinity of the 3-phase contact line

Ibrahem, K. and Abd Rabbo, M. F. and Gambaryan-Roisman, Tatiana and Stephan, Peter (2010):
Experimental and numerical investigation of evaporative heat transfer in the vicinity of the 3-phase contact line.
In: Proceedings Third International Conference on Thermal Issues in Emerging Technologies: Theory and Applications, IEEE, pp. 207-215, DOI: 10.1109/THETA.2010.5766400,
[Online-Edition: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=576...],
[Article]

Abstract

An experimental study is conducted to investigate the local heat flow at a solid--liquid--vapor contact line. A vertical channel of 600 \textgreekmm width is built using two parallel flat plates; a 10 \textgreekmm thick stainless steel heating foil forms a part of one of the flat plates. A liquid--vapor meniscus is formed between the plates due to capillary forces. In this study the fluid HFE7100 is evaporated inside the channel under steady state conditions. Two-dimensional microscale temperature fields at the back side of the heating foil are observed with a infrared camera with a spatial resolution of 14.8 \textgreekmm × 14.8 \textgreekmm. An in situ calibration procedure is applied. The measured local wall temperature difference between the contact line area and the bulk liquid is up to 12 K. The liquid front undergoes a slow oscillatory motion which can be attributed to the instability of evaporating 3-phase contact line. The local heat fluxes from the heater to the evaporating meniscus are calculated from the measured wall temperatures using an energy balance for each pixel element. The local heat fluxes at the contact line area are found to be about 5.4--6.5 times higher than the mean input heat fluxes at the foil.

Item Type: Article
Erschienen: 2010
Creators: Ibrahem, K. and Abd Rabbo, M. F. and Gambaryan-Roisman, Tatiana and Stephan, Peter
Title: Experimental and numerical investigation of evaporative heat transfer in the vicinity of the 3-phase contact line
Language: English
Abstract:

An experimental study is conducted to investigate the local heat flow at a solid--liquid--vapor contact line. A vertical channel of 600 \textgreekmm width is built using two parallel flat plates; a 10 \textgreekmm thick stainless steel heating foil forms a part of one of the flat plates. A liquid--vapor meniscus is formed between the plates due to capillary forces. In this study the fluid HFE7100 is evaporated inside the channel under steady state conditions. Two-dimensional microscale temperature fields at the back side of the heating foil are observed with a infrared camera with a spatial resolution of 14.8 \textgreekmm × 14.8 \textgreekmm. An in situ calibration procedure is applied. The measured local wall temperature difference between the contact line area and the bulk liquid is up to 12 K. The liquid front undergoes a slow oscillatory motion which can be attributed to the instability of evaporating 3-phase contact line. The local heat fluxes from the heater to the evaporating meniscus are calculated from the measured wall temperatures using an energy balance for each pixel element. The local heat fluxes at the contact line area are found to be about 5.4--6.5 times higher than the mean input heat fluxes at the foil.

Journal or Publication Title: Proceedings Third International Conference on Thermal Issues in Emerging Technologies: Theory and Applications
Place of Publication: Cairo, Egypt
Publisher: IEEE
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute for Technical Thermodynamics (TTD)
Exzellenzinitiative
Exzellenzinitiative > Clusters of Excellence
Zentrale Einrichtungen
Exzellenzinitiative > Clusters of Excellence > Center of Smart Interfaces (CSI)
Event Title: Proceedings Third International Conference on Thermal Issues in Emerging Technologies: Theory and Applications
Event Location: Cairo, Egypt
Event Dates: 19.-22.12.2010
Date Deposited: 17 Dec 2014 13:51
DOI: 10.1109/THETA.2010.5766400
Official URL: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=576...
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