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A Theoretical Analysis of Microchannel Flow Boiling Enhancement via Cross-Sectional Expansion


Abstract Microchannel heat sinks can possess heat transfer characteristics unavailable in conventional heat exchangers; such sinks offer compact solutions to otherwise intractable thermal management problems, notably in small-scale electronics cooling. Flow boiling in microchannels allows a very high heat transfer rate, but is bounded by the critical heat flux (CHF). This thesis presents a theoretical-numerical study of a method to improve the heat rejection capability of a microchannel heat sink via expansion of the channel cross-section along the flow direction. The thermodynamic quality of the refrigerant increases during flow boiling, decreasing the density of the bulk coolant as it flows. This may effect pressure fluctuations in the channels, l... (more)
Created Date 2011
Contributor Miner, Mark Jeffrey (Author) / Phelan, Patrick E (Advisor) / Herrmann, Marcus (Committee member) / Chen, Kangping (Committee member) / Arizona State University (Publisher)
Subject Mechanical Engineering / critical heat flux / cross-section / divergent channel / flow boiling / heat transfer / microchannel
Type Masters Thesis
Extent 64 pages
Language English
Copyright
Reuse Permissions All Rights Reserved
Note M.S. Mechanical Engineering 2011
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS


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Description Dissertation/Thesis