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19 April 2024

» pubmed » pmid15447149

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Anisotropic thermal conduction in a polymer liquid subjected to shear flow
David C Venerus ; Jay D Schieber ; Venkat Balasubramanian ; Kendall Bush ; Stoyan Smoukov ;
Date:	27 Aug 2004
Journal:	Phys Rev Lett, 93 (9), 098301
Abstract:	Flow-induced anisotropic thermal conduction in a polymer liquid is studied using force Rayleigh scattering. Time-dependent measurements of the complete thermal diffusivity tensor, which includes one off-diagonal and three diagonal components, are reported on an entangled polymer melt subjected to a uniform shear deformation. These data, in conjunction with mechanical measurements of the stress, provide the first direct evidence that the thermal conductivity tensor and the stress tensor are linearly related in a deformed polymer liquid.
Source:	PubMed, pmid15447149
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