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Title: Experimental investigation of non-uniform heating effect on flow boiling instabilities in a microchannel-based heat sink
Authors: Bogojevic, D
Sefiane, K
Walton, AJ
Lin, H
Cummins, G
Kenning, DBR
Karayiannis, TG
Keywords: Microchannels;Flow boiling;Two-phase flow instabilities;Hotspot;Microsensors
Issue Date: 2011
Publisher: Elsevier Masson SAS
Citation: International Journal of Thermal Sciences, 50(3): 309 - 324, Mar 2011
Abstract: Two-phase flow boiling in microchannels is one of the most promising cooling technologies for coping with high heat fluxes produced by the next generation of central processor units (CPUs). If flow boiling is to be used as a thermal management method for high heat flux electronics it is necessary to understand the behaviour of a non-uniform heat distribution, which is typically the case observed in a real operating CPU. The work presented is an experimental study of two-phase boiling in a multi-channel silicon heat sink with non-uniform heating, using water as the cooling liquid. Thin nickel film sensors, integrated on the back side of the heat sinks were used in order to gain insight related to temperature fluctuations caused by two-phase flow instabilities under non-uniform heating. The effect of various hotspot locations on the temperature profile and pressure drop has been investigated. It was observed that boiling inside microchannels with axially non-uniform heating leads to high temperature non-uniformity in the transverse direction.
Description: Copyright @ 2011 Elsevier
ISSN: 1290-0729
Appears in Collections:Publications
Mechanical and Aerospace Engineering
Dept of Mechanical Aerospace and Civil Engineering Research Papers

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