Please use this identifier to cite or link to this item: http://hdl.handle.net/11422/8734
Type: Artigo
Title: An Analysis of Heat Conduction Models for Nanofluids
Author(s)/Inventor(s): Quaresma, João Nazareno Nonato
Macêdo, Emanuel Negrão
Fonseca, Henrique Massard da
Orlande, Helcio Rangel Barreto
Cotta, Renato Machado
Abstract: Indisponível.
Abstract: The mechanism of heat transfer intensification recently brought about by nanofluids is analyzed in this article, in the light of the non-Fourier dual-phase-lagging heat conduction model. The physical problem involves an annular geometry filled with a nanofluid, such as typically used for measurements of the thermal conductivity with Blackwell's line heat source probe. The mathematical formulation for this problem is analytically solved with the classical integral transform technique, thus providing benchmark results for the temperature predicted with the dual-phase-lagging model. Different test cases are examined in this work, involving nanofluids and probe sizes of practical interest. The effects of the relaxation times on the temperature at the surface of the probe are also examined. The results obtained with the dual-phase-lagging model are critically compared to those obtained with the classical parabolic model, showing that the increase in the thermal conductivity of nanofluids measured with the line heat source probe cannot be attributed to hyperbolic effects.
Keywords: Temperature variation
Heat conduction
Non-Fourier effects
Subject CNPq: CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::AREAS CLASSICAS DE FENOMENOLOGIA E SUAS APLICACOES::DINAMICA DOS FLUIDOS
Production unit: Núcleo Interdisciplinar de Dinâmica dos Fluidos
Publisher: Taylor & Francis
In: Heat Transfer Engineering
Volume: 31
Issue: 14
Issue Date: 28-Oct-2010
DOI: 10.1080/01457631003689211
Publisher country: Brasil
Language: eng
Right access: Acesso Aberto
ISSN: 0145-7632
Appears in Collections:Engenharias

Files in This Item:
File Description SizeFormat 
2010_QUARESMA_v31_p1125-1136-min.pdf471,57 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.