{"title":"NATURAL CONVECTION OF NON NEWTONIAN DILATANT FLUID IN THE GAP BETWEEN AN OUTER CYLINDER AND INNER CYLINDER WITH GROOVES","authors":"Oussama Benhizia, Mohamed Bouzit","doi":"10.1615/heattransres.2023050322","DOIUrl":null,"url":null,"abstract":"This paper reports a numerical study of the laminar free convection of dilatant fluid between two concentric cylinders. The simulations have been performed for the two dimensional steady state and the ANSYS CFX 16.2 was used for that objective. The governing problem parameters are taken as 1≤n≤1.6, 10≤Pr≤103, 103≤Ra≤105 and different number of grooves added to the inner cylinder (4, 8, 12, 16). We give detailed explanations on the effects of the precedent coefficients on the streamlines, isotherms, velocity and dimensionless temperature. The Rayleigh number strengthens the convective flow which refers by increasing in the Nusselt number at the same set of the other parameters; Also, the important phenomenon here (effects of the grooves) will have a large part from the discussion section. When the grooves accomplished a given number and n is high, the fluid is stiff and the heat transfer mode is purely by conduction.","PeriodicalId":50408,"journal":{"name":"Heat Transfer Research","volume":null,"pages":null},"PeriodicalIF":1.7000,"publicationDate":"2023-12-01","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.2023050322","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
This paper reports a numerical study of the laminar free convection of dilatant fluid between two concentric cylinders. The simulations have been performed for the two dimensional steady state and the ANSYS CFX 16.2 was used for that objective. The governing problem parameters are taken as 1≤n≤1.6, 10≤Pr≤103, 103≤Ra≤105 and different number of grooves added to the inner cylinder (4, 8, 12, 16). We give detailed explanations on the effects of the precedent coefficients on the streamlines, isotherms, velocity and dimensionless temperature. The Rayleigh number strengthens the convective flow which refers by increasing in the Nusselt number at the same set of the other parameters; Also, the important phenomenon here (effects of the grooves) will have a large part from the discussion section. When the grooves accomplished a given number and n is high, the fluid is stiff and the heat transfer mode is purely by conduction.
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.
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