Edinburgh Research Explorer

EXPERIMENTAL INVESTIGATION OF NON-UNIFORM HEATING ON FLOW BOILING INSTABILITIES IN A MICROCHANNELS BASED HEAT SINK

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Related Edinburgh Organisations

Original languageEnglish
Title of host publicationICNMM 2009, PTS A-B
Place of PublicationNEW YORK
PublisherAmerican Society for Mechanical Engineers
Pages59-67
Number of pages9
ISBN (Print)978-0-7918-4349-9
Publication statusPublished - 2009
Event7th International Conference on Nanochannels, Microchannels and Minichannels - Pohang
Duration: 22 Jun 200924 Jun 2009

Conference

Conference7th International Conference on Nanochannels, Microchannels and Minichannels
CityPohang
Period22/06/0924/06/09

Abstract

Two-phase flow boiling in microchannels is one of the most promising cooling technologies able to cope with high heat fluxes generated by the next generation of central processor units (CPU). 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 a 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, with hotspots located in different positions along the heat sink. It was observed that boiling inside microchannels with non-uniform heating led to high temperature non-uniformity in transverse direction.

    Research areas

  • PARALLEL MICRO-CHANNELS, PRESSURE-DROP

ID: 1364725