{"title":"Melting performance enhancement of FHD carreau non-Newtonian PCM in porous media: A geometrical evaluation","authors":"M. Talebzadegan, M. Moravej, E. Assareh, M. Izadi","doi":"10.2298/tsci210912016t","DOIUrl":null,"url":null,"abstract":"In this paper melting of a carreau non-Newtonian phase change material in the space between two concentric horizontal tubes, which is partially filled with porous material with different shapes but same area, is investigated numerically. A magnetic source is located in the center of the geometry for melting process of phase change material to occur in the presence of ferrohydrodynamic effects. Porous material is made of Cu that covers the cross section of the inner tube. In addition, the space between inner and outer tubes is saturated with paraffin-wax phase change material. Flow of melted paraffin-wax is considered as a carreau non-Newtonian, laminar and incompressible flow with viscous dissipation that is evaluated in a specific time interval. Boussinesq approximation is valid for the phase change material. Also local thermal equilibrium condition is assumed between the porous and the phase change materials. Galerkin finite element method (GFEM) has been utilized to solve the problem. Results showed that melting rate is higher for the third model in comparison to other models. Also Effects of the magnetic number depends on the shape of the porous medium. Therefore, that increase in the magnetic number, increasingly enhances the progress of the melting front in the second case. Moreover, effects of carreau index, Stefan number and porosity on the melting process are studied.","PeriodicalId":23125,"journal":{"name":"Thermal Science","volume":"1 1","pages":""},"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/tsci210912016t","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"THERMODYNAMICS","Score":null,"Total":0}
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Abstract
In this paper melting of a carreau non-Newtonian phase change material in the space between two concentric horizontal tubes, which is partially filled with porous material with different shapes but same area, is investigated numerically. A magnetic source is located in the center of the geometry for melting process of phase change material to occur in the presence of ferrohydrodynamic effects. Porous material is made of Cu that covers the cross section of the inner tube. In addition, the space between inner and outer tubes is saturated with paraffin-wax phase change material. Flow of melted paraffin-wax is considered as a carreau non-Newtonian, laminar and incompressible flow with viscous dissipation that is evaluated in a specific time interval. Boussinesq approximation is valid for the phase change material. Also local thermal equilibrium condition is assumed between the porous and the phase change materials. Galerkin finite element method (GFEM) has been utilized to solve the problem. Results showed that melting rate is higher for the third model in comparison to other models. Also Effects of the magnetic number depends on the shape of the porous medium. Therefore, that increase in the magnetic number, increasingly enhances the progress of the melting front in the second case. Moreover, effects of carreau index, Stefan number and porosity on the melting process are studied.
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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