{"title":"Direct numerical simulation of double diffusive natural convection in a closed mixture cavity heated from below","authors":"Yaowen Xia, Juan Chen","doi":"10.2298/tsci221107069x","DOIUrl":null,"url":null,"abstract":"Double diffusive natural convection is one of the most widely used study subjects in heat and mass transfer. In this present study, double diffusive natural convection heating from below the wall in a closed cavity was studied with DNS method. The flow characteristics are presented as isotherms, iso concentrations, and streamlines. The results show that RaT has signification strong effects on average Nusselt number, with a more considerable RaT, the value of Nusselt number more higher. These were also found to increase with increasing buoyancy ratio for adding flow and decrease as buoyancy ratio decreases for opposing flows.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":null,"pages":null},"PeriodicalIF":1.1000,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Thermal Science","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.2298/tsci221107069x","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"THERMODYNAMICS","Score":null,"Total":0}
引用次数: 0
Abstract
Double diffusive natural convection is one of the most widely used study subjects in heat and mass transfer. In this present study, double diffusive natural convection heating from below the wall in a closed cavity was studied with DNS method. The flow characteristics are presented as isotherms, iso concentrations, and streamlines. The results show that RaT has signification strong effects on average Nusselt number, with a more considerable RaT, the value of Nusselt number more higher. These were also found to increase with increasing buoyancy ratio for adding flow and decrease as buoyancy ratio decreases for opposing flows.
期刊介绍：
The main aims of Thermal Science
to publish papers giving results of the fundamental and applied research in different, but closely connected fields:
fluid mechanics (mainly turbulent flows), heat transfer, mass transfer, combustion and chemical processes
in single, and specifically in multi-phase and multi-component flows
in high-temperature chemically reacting flows
processes present in thermal engineering, energy generating or consuming equipment, process and chemical engineering equipment and devices, ecological engineering,
The important characteristic of the journal is the orientation to the fundamental results of the investigations of different physical and chemical processes, always jointly present in real conditions, and their mutual influence. To publish papers written by experts from different fields: mechanical engineering, chemical engineering, fluid dynamics, thermodynamics and related fields. To inform international scientific community about the recent, and most prominent fundamental results achieved in the South-East European region, and particularly in Serbia, and - vice versa - to inform the scientific community from South-East European Region about recent fundamental and applied scientific achievements in developed countries, serving as a basis for technology development. To achieve international standards of the published papers, by the engagement of experts from different countries in the International Advisory board.
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