POOL BOILING HEAT TRANSFER ENHANCEMENT USING MICRO-FIN SURFACES AND DIELECTRIC FLUIDS

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorKiyomura, Igor Seicho-
Autor(es): dc.creatorNunes, Jessica Martha-
Autor(es): dc.creatorSouza, Reinaldo Rodrigues de-
Autor(es): dc.creatorCardoso, Elaine Maria-
Autor(es): dc.creatorBEGELL HOUSE INC-
Data de aceite: dc.date.accessioned2025-08-21T18:39:44Z-
Data de disponibilização: dc.date.available2025-08-21T18:39:44Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2019-12-31-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/299776-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/299776-
Descrição: dc.descriptionOne promising way to enhance the heat transfer coefficient (HTC) and the critical heat flux (CHF) is modifying the heating surface morphology by using machining techniques, coating, and chemical processes. Microstructured surfaces, i.e., surfaces with the presence of micro-pillars on the surface, provide small perturbations in the liquid, affecting the vapor bubbles dynamic. These structures increase the heating surface area and change the fluid flow. Micro-fins can have different shapes and sizes and can be arranged in different patterns to improve heat transfer. This study aims to evaluate experimentally the thermal performance of different micro-fin surfaces by using HFE-7100 as working fluid. The square-micro pillar arrays were etched on a plain copper surface through the micro-milling process. Squares micro-fins of different length scales (i.e., height and side length) were uniformly spaced on the plain copper surface. The inter-fin space had the same value, 250 mu m, for all surfaces in order to control the effective roughness, Reff, defined as the ratio of the area in contact with the liquid to the projected area. Micro-fin surfaces intensify the HTC as compared to the plain surface and the number of fins is the main factor for the HTC enhancement; if the number of micro-fins is constant, the larger the effective roughness the higher the heat transfer performance. Additionally, the capillary-wicking ability increases and it also improves the HTC and the dryout heat flux due to the prevention of hotspots in the microfin surface. Thus, the surface thermal behavior is a function of the surface morphology and its surface capillary wicking.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionUNESP Sao Paulo State Univ, Sch Engn, Postgrad Program Mech Engn, Ave Brasil 56, BR-15385000 Ilha Solteira, SP, Brazil-
Descrição: dc.descriptionUNESP Sao Paulo State Univ, Campus Sao Joao da Boa Vista, Sao Joao Da Boa Vista, Brazil-
Descrição: dc.descriptionUNESP Sao Paulo State Univ, Sch Engn, Postgrad Program Mech Engn, Ave Brasil 56, BR-15385000 Ilha Solteira, SP, Brazil-
Descrição: dc.descriptionUNESP Sao Paulo State Univ, Campus Sao Joao da Boa Vista, Sao Joao Da Boa Vista, Brazil-
Descrição: dc.descriptionCNPq: 458702/2014-5-
Descrição: dc.descriptionFAPESP: 2013/15431-7-
Descrição: dc.descriptionFAPESP: 2017/13813-0-
Descrição: dc.descriptionFAPESP: 2019/02566-8-
Formato: dc.format15-23-
Idioma: dc.languageen-
Publicador: dc.publisherBegell House, Inc-
Relação: dc.relation5th Thermal And Fluids Engineering Conference, Tfec 2020-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectmicro-pillars-
Palavras-chave: dc.subjecteffective roughness-
Palavras-chave: dc.subjectpool boiling-
Palavras-chave: dc.subjectheat transfer coefficient-
Palavras-chave: dc.subjectHFE-7100-
Título: dc.titlePOOL BOILING HEAT TRANSFER ENHANCEMENT USING MICRO-FIN SURFACES AND DIELECTRIC FLUIDS-
Tipo de arquivo: dc.typeaula digital-
Aparece nas coleções:Repositório Institucional - Unesp

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