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Heat transfer enhancement by recirculating flow within liquid plugs in microchannels

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Heat transfer enhancement by recirculating flow within liquid plugs in microchannels

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dc.contributor.author Che, Zhizhao
dc.contributor.author Wong, Teck Neng
dc.contributor.author Nguyen, Nam-Trung
dc.date.accessioned 2012-05-11T01:21:13Z
dc.date.available 2012-05-11T01:21:13Z
dc.date.copyright 2011
dc.date.issued 2012-05-11
dc.identifier.citation Che, Z. Z., Wong, T. N., & Nguyen, N. T. (2011). Heat transfer enhancement by recirculating flow within liquid plugs in microchannels. International Journal of Heat and Mass Transfer, 55(7-8), 1947-1956.
dc.identifier.uri http://hdl.handle.net/10220/7847
dc.description.abstract Plug flow can significantly enhance heat transfer in microchannels as compared to single phase flow. Using an analytical model of flow field, heat transfer in plug flow is investigated. The constant-surface-temperature boundary condition is considered. Three stages of the heat transfer in plugs are identified: (i) development of thermal boundary layer; (ii) advection of heated/fresh fluid in the plug; and (iii) thermally fully developed flow. Due to the transport of heated fluid and fresh fluid within the plug by the recirculating flow, oscillations of the Nusselt number at high Peclet numbers are observed and explained. The effects of the Peclet number and the plug length on the heat transfer process are evaluated. The results show that short plugs are preferable to long plugs since short plugs result in high Nusselt numbers and high heat transfer indices.
dc.format.extent 53 p.
dc.language.iso en
dc.relation.ispartofseries International journal of heat and mass transfer
dc.rights © 2011 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by International Journal of Heat and Mass Transfer, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1016/j.ijheatmasstransfer.2011.11.050].
dc.subject DRNTU::Engineering::Mechanical engineering.
dc.title Heat transfer enhancement by recirculating flow within liquid plugs in microchannels
dc.type Journal Article
dc.contributor.school School of Mechanical and Aerospace Engineering
dc.identifier.doi http://dx.doi.org.ezlibproxy1.ntu.edu.sg/10.1016/j.ijheatmasstransfer.2011.11.050
dc.identifier.rims 163236

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