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Steady state heat transfer within a nanoscale spatial domain.

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Steady state heat transfer within a nanoscale spatial domain.

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dc.contributor.author Poletkin, Kirill V.
dc.contributor.author Kulish, Vladimir.
dc.date.accessioned 2012-05-29T06:04:53Z
dc.date.available 2012-05-29T06:04:53Z
dc.date.copyright 2012
dc.date.issued 2012-05-29
dc.identifier.citation Poletkin, K. V. & Kulish, V. (2012). Steady State Heat Transfer Within a Nanoscale Spatial Domain. Journal of Heat Transfer, 134(7).
dc.identifier.uri http://hdl.handle.net/10220/8164
dc.description.abstract In this paper, we study the steady state heat transfer process within a spatial domain of the transporting medium whose length is of the same order as the distance, travelled by thermal waves before these waves are dissipated by thermal diffusion. In this study, the thermal conductivity is defined as a function of a spatial variable. This is achieved by analyzing an effective thermal diffusivity that is used to match the transient temperature behavior in the case of heat wave propagation by the result obtained from the Fourier theory. Then, combining the defined sizedependent thermal conductivity with Fourier’s law allows us to study the behavior of the heat flux at nanoscale and predict that a decrease of the size of the transporting medium leads to an increase of the heat transfer coefficient which reaches its finite maximal value, contrary to the infinite value predicted by the classical theory. The upper limit value of the heat transfer coefficient is proportional to the ratio of the bulk value of the thermal conductivity to the characteristic length of thermal waves in the transporting medium.
dc.format.extent 12 p.
dc.language.iso en
dc.relation.ispartofseries Journal of heat transfer
dc.rights © 2012 ASME.
dc.subject DRNTU::Engineering::Mechanical engineering.
dc.title Steady state heat transfer within a nanoscale spatial domain.
dc.type Journal Article
dc.contributor.school School of Mechanical and Aerospace Engineering
dc.identifier.doi http://dx.doi.org/10.1115/1.4006160
dc.identifier.rims 160237

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