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http://hdl.handle.net/11422/8441
Especie: | Artigo |
Título : | Transient conjugated heat transfer in microchannels: Integral transforms with single domain formulation |
Autor(es)/Inventor(es): | Knupp, Diego Campos Cotta, Renato Machado Naveira-Cotta, Carolina Palma Kakaç, Sadik |
Resumen: | Indisponível. |
Resumen: | The transient behaviour of conjugated heat transfer in laminar microchannel flow is investigated, taking into account the axial diffusion effects, which are often of relevance in microchannels, and including pre-heating or pre-cooling of the region upstream of the heat exchange section. The solution methodology is based on the Generalized Integral Transform Technique (GITT), as applied to a single domain formulation proposed for modelling the heat transfer phenomena at both the fluid stream and the channel wall regions. By making use of coefficients represented as space dependent functions with abrupt transitions occurring at the fluid–wall interfaces, the mathematical model carries the information concerning the transition of the two domains, unifying the model into a single domain formulation with variable coefficients. The proposed approach is illustrated for microchannels with polymeric walls of different thicknesses. The accuracy of approximate internal wall temperature estimates deduced from measurements of the external wall temperatures, accounting only for the thermal resistance across the wall thickness, is also analyzed. |
Materia: | Transient convection Conjugated problem Microchannel Integral transforms Micro-heat exchanger Generalized Integral Transform Technique |
Materia CNPq: | CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::AREAS CLASSICAS DE FENOMENOLOGIA E SUAS APLICACOES::DINAMICA DOS FLUIDOS |
Unidade de producción: | Núcleo Interdisciplinar de Dinâmica dos Fluidos |
Editor: | Elsevier |
Es parte de: | International Journal of Thermal Sciences |
Volumen: | 88 |
Fecha de publicación: | 10-jun-2014 |
DOI: | 10.1016/j.ijthermalsci.2014.04.017 |
País de edición : | Brasil |
Idioma de publicación: | eng |
Tipo de acceso : | Acesso Aberto |
ISSN: | 1290-0729 |
Aparece en las colecciones: | Engenharias |
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1-2015_Transient-conjugated-heat-transfer-in-microchannels-min.pdf | 437.81 kB | Adobe PDF | Visualizar/Abrir |
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