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Advances in Heat Transfer Engineering

ISSN:
1-56700-198-1 (Print)

CONVECTIVE BOILING IN PARALLEL MICRO-CHANNELS

Gad Hetsroni
Department of Mechanical Engineering, Technion- Israel Institute of Technology, Technion City, 32000 Haifa, Israel

Daniel Klein
Department of Mechanical Engineering, Technion- Israel Institute of Technology, Technion City, 32000 Haifa, Israel

Albert Mosyak
Department of Mechanical Engineering, Technion - Israel Institute of Technology, 32000 Haifa, Israel

Zelik Segal
Department of Mechanical Engineering, Technion - Israel Institute of Technology, 32000 Haifa, Israel

Elena Pogrebnyak
Department of Mechanical Engineering, Technion - Israel Institute of Technology, 32000 Haifa, Israel

Abstract

Experiments were condacted with water and surfactant flow in parallel triangular micro-channels. The study was based on systematic measurements of temperature and flow pattern by infrared radiometry and high-speed digital video imaging. Different flow patterns were observed simultaneously in various micro-channels al a fixed value of water or surfactant flow rates. Depending on flow and heat flux, pressure and temperature instabilities in the heated micro-channels were studied. This work develops a practical modeling approach for two-phase micro-channel heat sinks and considers also the effect of surfactants on convective boiling in micro-channels.