Measurements of thermal properties and blood perfusion using the heat flux microsensor

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dc.contributor.authorMichener, Michael Douglasen
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T21:32:01Zen
dc.date.adate2010-03-17en
dc.date.available2014-03-14T21:32:01Zen
dc.date.issued1991en
dc.date.rdate2010-03-17en
dc.date.sdate2010-03-17en
dc.description.abstractA thin-film heat flux sensor was used in two transient conduction applications. First it was used in a device for simultaneously determining the thermal conductivity, κ, and the thermal diffusivity, α, of solid materials. The device was heated and then touched to metal samples at room temperature. The thermal properties were characterized based on the heat flux response of the gage, and the change in temperature of the metal surface at a specified distance away from the gage. A finite difference program was developed and used to model the system response. The effect of α was most evident by the time delay in the temperature response on the metal surface. The effect of κ was most evident in the heat flux response after the first few seconds of contact. In the second application, the gage was used in a probe that was cooled and then touched to biological materials. A numerical model was used to demonstrate the effect of tissue blood perfusion on the surface heat flux. Experimental tests were performed on live dogs. Both the numerical model and the experiments showed that increases in blood perfusion could be detected from the transient heat flux measurements. In both applications, this research forms the basis for instrumentation which will be able to measure κ, α, and blood perfusion.en
dc.description.degreeMaster of Scienceen
dc.format.extentxi, 131 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-03172010-020457en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-03172010-020457/en
dc.identifier.urihttp://hdl.handle.net/10919/41696en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1991.M534.pdfen
dc.relation.isformatofOCLC# 23739350en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1991.M534en
dc.subject.lcshBlooden
dc.subject.lcshFluxmeteren
dc.titleMeasurements of thermal properties and blood perfusion using the heat flux microsensoren
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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