Assessment of modulated hot wire method for thermophysical characterization of fluid and solid matrices charged with (nano)particle inclusions

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creativework.publisherInstitute of Physics Publishinghelen.craven@iop.orgen
dc.contributor.authorChirtoc M.
dc.contributor.authorHenry J.
dc.contributor.authorTurgut A.
dc.contributor.authorTavman I.
dc.contributor.authorHadjov K.
dc.contributor.authorSchuchmann H.
dc.contributor.authorSauter C.
dc.contributor.authorAntoniow J.
dc.contributor.authorFudym O.
dc.contributor.authorTavman S.
dc.date.accessioned2024-07-10T14:27:03Z
dc.date.accessioned2024-07-10T14:47:27Z
dc.date.available2024-07-10T14:27:03Z
dc.date.available2024-07-10T14:47:27Z
dc.date.issued2010-01-01
dc.description.abstractRecently we reported on simultaneous thermal conductivity k and thermal diffusivity a measurement of liquids and in particular of nanofluids in a configuration using an ac excited hot wire combined with lock-in detection of the third harmonic (3ω method) [1]. The conductive wire is used as both heater and sensor. The requirements for the asymptotic validity of the line heat source model are fulfilled at low modulation frequencies below a few Hz. The study of the relative sensitivity of signal amplitude and phase to changes in k and a indicates that there is an optimum frequency range for accurate and stable results. We extend by up to two decades the feasible frequency range for 3ω measurements by considering various more elaborate models for the heat transfer between the wire and the fluid. Finally we show that the same ac hot wire method can be applied to soft solid, composite materials. We measured the k enhancement of a poly(ethylene vinyl acetate) EVA polymer matrix charged with various fractions of graphite. © 2010 IOP Publishing Ltd.
dc.identifier.doi10.1088/1742-6596/214/1/012135
dc.identifier.issn1742-6596
dc.identifier.issn1742-6588
dc.identifier.scopusSCOPUS_ID:77950688425en
dc.identifier.urihttps://rlib.uctm.edu/handle/123456789/179
dc.language.isoen
dc.source.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=77950688425&origin=inward
dc.titleAssessment of modulated hot wire method for thermophysical characterization of fluid and solid matrices charged with (nano)particle inclusions
dc.typeConference Paper
oaire.citation.volume214
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