{"title":"A step forward on the network method for radiation heat transfer analysis in enclosures","authors":"Vitor Costa","doi":"10.1615/heattransres.2024053249","DOIUrl":null,"url":null,"abstract":"It is proposed an approach of the network method for radiation in enclosures that expresses radiosities and irradiations as functions of the blackbody emissive powers and of the radiation fluxes entering the enclosure through its partially transparent walls. These results are used to express the radiation heat flow exchanged between two surfaces and the net radiation heat flux leaving each of the enclosure’s surfaces as depending on these true driving forces for radiation heat transfer. This reduces the problem to its essential, as these are the true driving forces for the radiation heat transfer. Net radiation heat fluxes leaving each of the enclosure’s surfaces form an equations’ system from which are evaluated the relevant radiation heat transfer parameters for each surface. Proposed approach is based on elementary matrices operations, the main attention being dedicated to the problem setting and leaving the (just essential) calculations to the calculator or to the computer. It is introduced for enclosures with all opaque walls and illustrated for one example, and then extended to enclosures with partially transparent walls. Proposed simplifying and unifying approach is relevant not only for radiation heat transfer analysis and calculations, but also for pedagogical purposes, retaining attention on the essential of the radiation heat transfer problem formulation, setting aside intermediate/auxiliary variables calculations that are usually aversive, fastidious, distractive and prone to errors.","PeriodicalId":50408,"journal":{"name":"Heat Transfer Research","volume":null,"pages":null},"PeriodicalIF":1.7000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Heat Transfer Research","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1615/heattransres.2024053249","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"THERMODYNAMICS","Score":null,"Total":0}
引用次数: 0
Abstract
It is proposed an approach of the network method for radiation in enclosures that expresses radiosities and irradiations as functions of the blackbody emissive powers and of the radiation fluxes entering the enclosure through its partially transparent walls. These results are used to express the radiation heat flow exchanged between two surfaces and the net radiation heat flux leaving each of the enclosure’s surfaces as depending on these true driving forces for radiation heat transfer. This reduces the problem to its essential, as these are the true driving forces for the radiation heat transfer. Net radiation heat fluxes leaving each of the enclosure’s surfaces form an equations’ system from which are evaluated the relevant radiation heat transfer parameters for each surface. Proposed approach is based on elementary matrices operations, the main attention being dedicated to the problem setting and leaving the (just essential) calculations to the calculator or to the computer. It is introduced for enclosures with all opaque walls and illustrated for one example, and then extended to enclosures with partially transparent walls. Proposed simplifying and unifying approach is relevant not only for radiation heat transfer analysis and calculations, but also for pedagogical purposes, retaining attention on the essential of the radiation heat transfer problem formulation, setting aside intermediate/auxiliary variables calculations that are usually aversive, fastidious, distractive and prone to errors.
期刊介绍:
Heat Transfer Research (ISSN1064-2285) presents archived theoretical, applied, and experimental papers selected globally. Selected papers from technical conference proceedings and academic laboratory reports are also published. Papers are selected and reviewed by a group of expert associate editors, guided by a distinguished advisory board, and represent the best of current work in the field. Heat Transfer Research is published under an exclusive license to Begell House, Inc., in full compliance with the International Copyright Convention. Subjects covered in Heat Transfer Research encompass the entire field of heat transfer and relevant areas of fluid dynamics, including conduction, convection and radiation, phase change phenomena including boiling and solidification, heat exchanger design and testing, heat transfer in nuclear reactors, mass transfer, geothermal heat recovery, multi-scale heat transfer, heat and mass transfer in alternative energy systems, and thermophysical properties of materials.