Diffusive-to-ballistic transition of the modulated heat transport in a rarefied air chamber | Zendy

C. L. Gómez-Heredia | Zendy; J. D. Macías | Zendy; José Ordoñez-Miranda | Zendy; O. Arés | Zendy; J. J. AlvaradoGil | Zendy

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Diffusive-to-ballistic transition of the modulated heat transport in a rarefied air chamber

Author(s) -

C. L. Gómez-Heredia,

J. D. Macías,

José Ordoñez-Miranda,

O. Arés,

J. J. AlvaradoGil

Publication year - 2017

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4972123

Subject(s) - torr , knudsen number , amplitude , atomic physics , chemistry , heat transfer , ballistic conduction , mechanics , thermodynamics , materials science , optics , physics , nuclear physics , electron

Modulated heat transfer in air subject to pressures from 760 Torr to 10-4 Torr is experimentally studied by means of a thermal-wave resonant cavity placed in a vacuum chamber. This is done through the analysis of the amplitude and phase delay of the photothermal signal as a function of the cavity length and pressure through of the Knudsen’s number. The viscous, transitional, and free molecular regimes of heat transport are observed for pressures P>1.5 Torr, 25 mTorr

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