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Hydrodynamic characterization of a passive shape memory alloy valve

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dc.contributor.author Waddell, Alistair Martin
dc.contributor.author Punch, Jeff
dc.contributor.author Stafford, Jason
dc.contributor.author Jeffers, Nicholas
dc.date.accessioned 2018-01-29T11:58:13Z
dc.date.available 2018-01-29T11:58:13Z
dc.date.issued 2014
dc.identifier.uri http://hdl.handle.net/10344/6501
dc.description peer-reviewed en_US
dc.description.abstract Next generation high-performance electronics will have large heat fluxes (>10(2) W/cm(2)) and an alternative approach to traditional air cooling is required. An attractive solution is micro-channel cooling and micro-valves will be required for refined flow control in the supporting micro-fluidic systems. A NiTi Shape Memory Alloy (SMA) micro-valve design was hydrodynamically characterized in this work to obtain the valve loss coefficient (K) from pressure measurements. The hydrodynamic characterization was important as in the flow regime of the micro-fluidic system K is sensitive to Reynolds number (Re) and geometry. Static replicas of the SMA valve geometry were studied for low Reynolds numbers (110 - 220) in a 1x1 mm CSA miniature channel. The loss coefficients were found to be sensitive to flow rate and decreased rapidly with an increase in Re. The SMA valve was compared to a similar gate micro-valve and loss across both valves was of the same order of magnitude. The valve loss coefficients obtained in this work are important parameters in the modeling and design of micro-fluidic cooling systems. en_US
dc.language.iso eng en_US
dc.publisher IOP Publishing en_US
dc.relation.ispartofseries Journal of Physics: Conference Series;525, 012010
dc.relation.uri http://dx.doi.org/10.1088/1742-6596/525/1/012010
dc.subject hydrodynamic characterization en_US
dc.subject micro-channel cooling en_US
dc.subject micro-valves en_US
dc.title Hydrodynamic characterization of a passive shape memory alloy valve en_US
dc.type info:eu-repo/semantics/conferenceObject en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.date.updated 2018-01-29T08:54:11Z
dc.description.version PUBLISHED
dc.identifier.doi 10.1088/1742-6596/525/1/012010
dc.contributor.sponsor SFI en_US
dc.contributor.sponsor IDA en_US
dc.relation.projectid 10/CE/I1853 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 1621876
dc.internal.copyrightchecked Yes
dc.description.status peer-reviewed


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