M. A. Boukideur, N. Selhaoui, F. Z. C. Alaoui, A. Aharoune
By virtue of its incomparable chemical, magnetic, electrical, optical and catalytic properties, the alloy of the Ga- Sm system is gaining importance in the high-tech industry. However, the lack of experimental thermodynamic data on this system made it difficult to design efficient extraction processes. In this regard, thermodynamic calculations can serve as a cost effective tool in terms of time and money in order to design a process to explore the thermodynamic properties of this system. Hence its modeling using the CALPHAD method via Thermo-calc. The Orthorhombic, Rhombohedral, Bcc, Hcp and liquid phases found in the solution were optimized with the substitutional solution model by the Redlich-Kister equation. The Ga-Sm binary system contains five stoichiometric compounds: Ga6Sm_BT, Ga6Sm_HT, GaSm, Ga3Sm5and GaSm3 and the Ga2Sm intermetallic compound, which have a wide homogeneity range, were treated as the formula (GA)2,(Ga,SM)1 by a two-sublattice model with Gallium and Samrium or Gallium on the first sublattice, and Gallium and Samarium on the second, respectively. A set of thermodynamic properties and parameters of the Ga-Sm binary system was obtained, and they are in good agreement with the experimental thermodynamic parameters available in the literature.
{"title":"Thermodynamic calculation of the Ga-Sm binary system","authors":"M. A. Boukideur, N. Selhaoui, F. Z. C. Alaoui, A. Aharoune","doi":"10.1063/5.0049598","DOIUrl":"https://doi.org/10.1063/5.0049598","url":null,"abstract":"By virtue of its incomparable chemical, magnetic, electrical, optical and catalytic properties, the alloy of the Ga- Sm system is gaining importance in the high-tech industry. However, the lack of experimental thermodynamic data on this system made it difficult to design efficient extraction processes. In this regard, thermodynamic calculations can serve as a cost effective tool in terms of time and money in order to design a process to explore the thermodynamic properties of this system. Hence its modeling using the CALPHAD method via Thermo-calc. The Orthorhombic, Rhombohedral, Bcc, Hcp and liquid phases found in the solution were optimized with the substitutional solution model by the Redlich-Kister equation. The Ga-Sm binary system contains five stoichiometric compounds: Ga6Sm_BT, Ga6Sm_HT, GaSm, Ga3Sm5and GaSm3 and the Ga2Sm intermetallic compound, which have a wide homogeneity range, were treated as the formula (GA)2,(Ga,SM)1 by a two-sublattice model with Gallium and Samrium or Gallium on the first sublattice, and Gallium and Samarium on the second, respectively. A set of thermodynamic properties and parameters of the Ga-Sm binary system was obtained, and they are in good agreement with the experimental thermodynamic parameters available in the literature.","PeriodicalId":330229,"journal":{"name":"AMT2020: THE 6TH INTERNATIONAL CONGRESS ON THERMAL SCIENCES","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116828181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. Khamar, A. Hadane, Saad Benjelloun, Sara Oqaidi
In the sulfuric acid manufacturing process, Sulphur is burned to form Sulphur dioxide SO2 that then undergoes conversion to Sulphur trioxide SO3. The combustion happens in a large horizontal chamber which is a cylindrical vessel of carbon steel lined internally with refractory and insulation bricks. The chamber has two air inlets, one for primary air and another for the secondary one which is injected into the furnace after the initial combustion of Sulphur and is consumed in the conversion stage. The efficiency of this equipment is affected by scaling problems which may be caused by particle impurities inducted with liquid Sulphur in the inlet or caused by erosion of baffle walls. The present work contains CFD (Computational Fluid Dynamics) modeling and simulations of the hydrodynamic reacting flows in the furnace. The analysis and diagnosis of the CFD results have made it possible to determine the deep causes of those problems, which are mainly caused by the temperature gradients existing on both sides of the baffle walls. CFD results were validated against theoretical findings and recommendations have been proposed to improve the performance of the furnace.
{"title":"Simulation of sulfur furnace combustion using CFD approach","authors":"L. Khamar, A. Hadane, Saad Benjelloun, Sara Oqaidi","doi":"10.1063/5.0049652","DOIUrl":"https://doi.org/10.1063/5.0049652","url":null,"abstract":"In the sulfuric acid manufacturing process, Sulphur is burned to form Sulphur dioxide SO2 that then undergoes conversion to Sulphur trioxide SO3. The combustion happens in a large horizontal chamber which is a cylindrical vessel of carbon steel lined internally with refractory and insulation bricks. The chamber has two air inlets, one for primary air and another for the secondary one which is injected into the furnace after the initial combustion of Sulphur and is consumed in the conversion stage. The efficiency of this equipment is affected by scaling problems which may be caused by particle impurities inducted with liquid Sulphur in the inlet or caused by erosion of baffle walls. The present work contains CFD (Computational Fluid Dynamics) modeling and simulations of the hydrodynamic reacting flows in the furnace. The analysis and diagnosis of the CFD results have made it possible to determine the deep causes of those problems, which are mainly caused by the temperature gradients existing on both sides of the baffle walls. CFD results were validated against theoretical findings and recommendations have been proposed to improve the performance of the furnace.","PeriodicalId":330229,"journal":{"name":"AMT2020: THE 6TH INTERNATIONAL CONGRESS ON THERMAL SCIENCES","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127678477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. Marsli, M. Diouri, Azhare El Khabbouti, H. Steli
Aerosol optical properties are of high importance in understanding the evolution of radiative balance; they can also explain the atmospheric evolution and then the climate change. This study is focused on the data analysis of aerosol optical characteristics: aerosol optical depth, particle size distribution, aerosol radiative forcing and single scattering albedo registered by the network AERONET/PHOTONS for urban and desert sites .The monthly average of volume concentrations records larger amplitudes for fine and coarse mode for Ilorin (Nigeria) for which the total volume concentrations of an atmospheric column reach 424 10-3µm3 /µm2 and confirm the importance of urban aerosols. In other way, desert aerosol where coarse mode dominates like Tamanrasset registers 265 10-3µm3 /µm2. The seasonal cycle of optical thickness in visible and infrared show the highest values for the desert sites especially in spring and summer, a maximum reach 3,6 at Mezaira (UAE), These largest values are associated with the highest values of SSA in visible and infrared that reach 0, 93. The atmospheric radiative forcing seems with the same importance for both urban and desert sites, maximum reaches +84 W/m2 recorded in Tamanrasset (Algeria) and +79 W/m2 in Ilorin (Nigeria). The results confirm the warming tendency of the Atmospheric radiative forcing under both urban and desert sites.
{"title":"Optical properties of desert and urban aerosol","authors":"I. Marsli, M. Diouri, Azhare El Khabbouti, H. Steli","doi":"10.1063/5.0049640","DOIUrl":"https://doi.org/10.1063/5.0049640","url":null,"abstract":"Aerosol optical properties are of high importance in understanding the evolution of radiative balance; they can also explain the atmospheric evolution and then the climate change. This study is focused on the data analysis of aerosol optical characteristics: aerosol optical depth, particle size distribution, aerosol radiative forcing and single scattering albedo registered by the network AERONET/PHOTONS for urban and desert sites .The monthly average of volume concentrations records larger amplitudes for fine and coarse mode for Ilorin (Nigeria) for which the total volume concentrations of an atmospheric column reach 424 10-3µm3 /µm2 and confirm the importance of urban aerosols. In other way, desert aerosol where coarse mode dominates like Tamanrasset registers 265 10-3µm3 /µm2. The seasonal cycle of optical thickness in visible and infrared show the highest values for the desert sites especially in spring and summer, a maximum reach 3,6 at Mezaira (UAE), These largest values are associated with the highest values of SSA in visible and infrared that reach 0, 93. The atmospheric radiative forcing seems with the same importance for both urban and desert sites, maximum reaches +84 W/m2 recorded in Tamanrasset (Algeria) and +79 W/m2 in Ilorin (Nigeria). The results confirm the warming tendency of the Atmospheric radiative forcing under both urban and desert sites.","PeriodicalId":330229,"journal":{"name":"AMT2020: THE 6TH INTERNATIONAL CONGRESS ON THERMAL SCIENCES","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114827300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper addresses the problem of natural convection in H-Form cavity with differentially heated side walls having two circular adiabatic obstacles. To achieve accurate solutions of the equations system defining this study, the computational methods are founded on the finite element method (FEM). Numerical illustrations have been carried out and discussed for several Rayleigh numbers from 10 to 106. We show the impact of Rayleigh number as a crucial parameter on both the heat transfer and the fluid flow. We deduce an important finding with H-Form cavity, the Rayleigh number hasn't a strong effect on both the characteristics of the fluid flow and the temperature distribution for the values ranging from 10 to 104, unlike the case of square cavity. However, its effect starts to appear from Ra = 105. The achieved results are discussed and compared with preceding works in the literature to show their effectiveness.
{"title":"Numerical modeling of natural convection in cavity with H-form containing two adiabatic obstacles","authors":"Amine Bouaine, M. Loukili","doi":"10.1063/5.0049340","DOIUrl":"https://doi.org/10.1063/5.0049340","url":null,"abstract":"This paper addresses the problem of natural convection in H-Form cavity with differentially heated side walls having two circular adiabatic obstacles. To achieve accurate solutions of the equations system defining this study, the computational methods are founded on the finite element method (FEM). Numerical illustrations have been carried out and discussed for several Rayleigh numbers from 10 to 106. We show the impact of Rayleigh number as a crucial parameter on both the heat transfer and the fluid flow. We deduce an important finding with H-Form cavity, the Rayleigh number hasn't a strong effect on both the characteristics of the fluid flow and the temperature distribution for the values ranging from 10 to 104, unlike the case of square cavity. However, its effect starts to appear from Ra = 105. The achieved results are discussed and compared with preceding works in the literature to show their effectiveness.","PeriodicalId":330229,"journal":{"name":"AMT2020: THE 6TH INTERNATIONAL CONGRESS ON THERMAL SCIENCES","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133092786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Steli, M. Diouri, I. Marsli, Azhare El Khabbouti, Abdelmoula Ben-tayeb
A better understanding of the optical, microphysical and radiative properties of aerosols is a critical challenge for climate change studies. In this study, the aerosol optical, microphysical, and radiative properties were investigated over three sites (Oujda, Saada, and Ouarzazate) in Morocco, Northern-Africa. Using ground-based Aerosol Robotic Network (AERONET),the annual mean aerosol optical depth at 440 nm (AOD440) was found high at saada (0.21 ± 0.11) followed by Ouarzazate (0.17 ± 0.11), and low at Oujda (0.17 ± 0.09). The maximum values of AE440–870, FMF500 coincide with a peak of activity production of dust from each region. The evolution of single scattering albedo is almost similar for every sites and indicates a very important trend in the diffusion. The averaged aerosol direct radiative forcing (ARF) retrieved from the AERONET showed a strong cooling effect at the bottom of the atmosphere (BOA) and significant warming within the atmosphere (ATM), representing the important role of aerosols played in this sites of Morocco. However, the ARF in Oujda and Ouarzazate seem identical despite the great weather disparity between the two sites.
{"title":"Aerosol optical properties and radiative forcing over three AERONET sites in Morocco","authors":"H. Steli, M. Diouri, I. Marsli, Azhare El Khabbouti, Abdelmoula Ben-tayeb","doi":"10.1063/5.0049655","DOIUrl":"https://doi.org/10.1063/5.0049655","url":null,"abstract":"A better understanding of the optical, microphysical and radiative properties of aerosols is a critical challenge for climate change studies. In this study, the aerosol optical, microphysical, and radiative properties were investigated over three sites (Oujda, Saada, and Ouarzazate) in Morocco, Northern-Africa. Using ground-based Aerosol Robotic Network (AERONET),the annual mean aerosol optical depth at 440 nm (AOD440) was found high at saada (0.21 ± 0.11) followed by Ouarzazate (0.17 ± 0.11), and low at Oujda (0.17 ± 0.09). The maximum values of AE440–870, FMF500 coincide with a peak of activity production of dust from each region. The evolution of single scattering albedo is almost similar for every sites and indicates a very important trend in the diffusion. The averaged aerosol direct radiative forcing (ARF) retrieved from the AERONET showed a strong cooling effect at the bottom of the atmosphere (BOA) and significant warming within the atmosphere (ATM), representing the important role of aerosols played in this sites of Morocco. However, the ARF in Oujda and Ouarzazate seem identical despite the great weather disparity between the two sites.","PeriodicalId":330229,"journal":{"name":"AMT2020: THE 6TH INTERNATIONAL CONGRESS ON THERMAL SCIENCES","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116038329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The assembly of metal structures by welding is very developed in the industry, in particular the pressure vessels: boilers, tanks, etc. In the case of boilers that produce hot water and steam, it is very interesting to reduce heat losses in the welds. The objective of our work is to analyze the defects of the welded structures using two methods: phased array ultrasound and infrared thermography, and to evaluate the thermal losses.
{"title":"Evaluation of thermal losses for welded structures by phased array and infrared thermography","authors":"A. Elkihel, A. Bakdid, H. Gziri, A. Nougaoui","doi":"10.1063/5.0049656","DOIUrl":"https://doi.org/10.1063/5.0049656","url":null,"abstract":"The assembly of metal structures by welding is very developed in the industry, in particular the pressure vessels: boilers, tanks, etc. In the case of boilers that produce hot water and steam, it is very interesting to reduce heat losses in the welds. The objective of our work is to analyze the defects of the welded structures using two methods: phased array ultrasound and infrared thermography, and to evaluate the thermal losses.","PeriodicalId":330229,"journal":{"name":"AMT2020: THE 6TH INTERNATIONAL CONGRESS ON THERMAL SCIENCES","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133146848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hajar Benhmidou, Zaid Romani, M. Mankibi, A. Draoui
This work investigates the impact of insulation measures on buildings energy consumption using infrared thermography as a fast and non-destructive tool to evaluate their thermal performance in situ. In this context, we have used this tool to assess this technique effectiveness in evaluating the insulation application on a residential building located in the city of Tangier in Northern Morocco. An experimental protocol was carried out in order to diagnose the studied building before and after the insulation application. Firstly, the different external surface temperatures of this building are used to estimate the in-situ heat transmission coefficient (U). The obtained U-values were then used in the Thermo-aeraulic modelling of the studied building under different interior and exterior climate conditions using the TRNSYS18-CONTAM environment.
{"title":"Wall insulation measures for residential building in Morocco: A case study in energy efficiency","authors":"Hajar Benhmidou, Zaid Romani, M. Mankibi, A. Draoui","doi":"10.1063/5.0049403","DOIUrl":"https://doi.org/10.1063/5.0049403","url":null,"abstract":"This work investigates the impact of insulation measures on buildings energy consumption using infrared thermography as a fast and non-destructive tool to evaluate their thermal performance in situ. In this context, we have used this tool to assess this technique effectiveness in evaluating the insulation application on a residential building located in the city of Tangier in Northern Morocco. An experimental protocol was carried out in order to diagnose the studied building before and after the insulation application. Firstly, the different external surface temperatures of this building are used to estimate the in-situ heat transmission coefficient (U). The obtained U-values were then used in the Thermo-aeraulic modelling of the studied building under different interior and exterior climate conditions using the TRNSYS18-CONTAM environment.","PeriodicalId":330229,"journal":{"name":"AMT2020: THE 6TH INTERNATIONAL CONGRESS ON THERMAL SCIENCES","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126113054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Daghab, M. Kaddiri, S. Raghay, M. Lamsaadi, H. E. Harfi
In this paper, numerical study on natural convection heat transfer for confined viscoelastic fluids is conducted. To describe the rheological behavior a Second grade model is adopted, which includes both the elasticity and shear thinning effects. The geometry of interest is a fluid-filled square cavity subjected at its vertical walls to a uniform density of heat flux, while the horizontal ones are insulated, without slipping conditions at all the solid boundaries. The governing partial differential equations written in terms of non-dimensional velocities, pressure and temperature formulation with the corresponding boundary conditions are discretized using a finite volume method in a collocated uniform grid system. Coupled equations of conservation are solved through iterative Semi Implicit Method for Pressure Linked Equation (SIMPLE) algorithm. The main purpose of the present study is to examine the effects of elastic property on the fluid flow and the resulting heat transfer.
{"title":"Numerical study of natural convection heat transfer for second-grade fluids confined in square cavity subjected to horizontal heat flux","authors":"H. Daghab, M. Kaddiri, S. Raghay, M. Lamsaadi, H. E. Harfi","doi":"10.1063/5.0049421","DOIUrl":"https://doi.org/10.1063/5.0049421","url":null,"abstract":"In this paper, numerical study on natural convection heat transfer for confined viscoelastic fluids is conducted. To describe the rheological behavior a Second grade model is adopted, which includes both the elasticity and shear thinning effects. The geometry of interest is a fluid-filled square cavity subjected at its vertical walls to a uniform density of heat flux, while the horizontal ones are insulated, without slipping conditions at all the solid boundaries. The governing partial differential equations written in terms of non-dimensional velocities, pressure and temperature formulation with the corresponding boundary conditions are discretized using a finite volume method in a collocated uniform grid system. Coupled equations of conservation are solved through iterative Semi Implicit Method for Pressure Linked Equation (SIMPLE) algorithm. The main purpose of the present study is to examine the effects of elastic property on the fluid flow and the resulting heat transfer.","PeriodicalId":330229,"journal":{"name":"AMT2020: THE 6TH INTERNATIONAL CONGRESS ON THERMAL SCIENCES","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132352087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zakaria Elmaazouzi, A. Gounni, M. Alami, Massaab El Ydrissi, E. Bennouna
The latent heat thermal energy storage (LHTES) systems, that uses phase change materials (PCMs), has taken attention of researchers because of their higher energy density and almost isothermal storage. However, the low thermal conductivity of most PCMs makes it necessary to develop effective techniques to improve the heat transfer. To overcome this disadvantage, several techniques have been proposed to improve the heat transfer of LHTES. In this sense, the performance of the proposed system, duplex concentric tube with annular fins, is investigated using a 2D axisymmetric model with Comsol Multiphysics software, considering charging and discharging processes. The main objective of this work is to provide the optimal heat transfer fluid (HTF) injection scenario of the studied system for charging and discharging processes. As a results, the top HTF injection scenario can reduce the melting and solidification time by 10.66% and 15% respectively compared to the bottom HTF injection one. Therefore, the top HTF injection scenario is more performed and recommended.
{"title":"Performance comparison of latent heat thermal energy storage in duplex concentric finned tube with different HTF inlets","authors":"Zakaria Elmaazouzi, A. Gounni, M. Alami, Massaab El Ydrissi, E. Bennouna","doi":"10.1063/5.0049408","DOIUrl":"https://doi.org/10.1063/5.0049408","url":null,"abstract":"The latent heat thermal energy storage (LHTES) systems, that uses phase change materials (PCMs), has taken attention of researchers because of their higher energy density and almost isothermal storage. However, the low thermal conductivity of most PCMs makes it necessary to develop effective techniques to improve the heat transfer. To overcome this disadvantage, several techniques have been proposed to improve the heat transfer of LHTES. In this sense, the performance of the proposed system, duplex concentric tube with annular fins, is investigated using a 2D axisymmetric model with Comsol Multiphysics software, considering charging and discharging processes. The main objective of this work is to provide the optimal heat transfer fluid (HTF) injection scenario of the studied system for charging and discharging processes. As a results, the top HTF injection scenario can reduce the melting and solidification time by 10.66% and 15% respectively compared to the bottom HTF injection one. Therefore, the top HTF injection scenario is more performed and recommended.","PeriodicalId":330229,"journal":{"name":"AMT2020: THE 6TH INTERNATIONAL CONGRESS ON THERMAL SCIENCES","volume":"974 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116211412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Y. Tizakast, M. Kaddiri, M. Lamsaadi, T. Makayssi, H. E. Harfi
This paper reports an analytical and numerical study of double-diffusive mixed convection in a non-Newtonian power-law fluid contained in a double lid driven horizontal rectangular enclosure submitted to uniform heat and mass fluxes along its short vertical sides, while the horizontal ones are insulated and impermeable. The first part from this study is devoted to the numerical solution of the governing equations, and the effect of the governing parameters, namely, flow behavior index for a power law fluid at the reference temperature and Lewis numbers, is examined. In the second part, an analytical solution, based on the parallel flow approximation in the case of a shallow cavity A ≫ 1, is proposed and a good agreement is found between the two types of solutions.
{"title":"Effect of Lewis number on mixed double-diffusive convection in shallow rectangular cavities with double-lid-driven boundaries filled with non-Newtonian power-law fluids","authors":"Y. Tizakast, M. Kaddiri, M. Lamsaadi, T. Makayssi, H. E. Harfi","doi":"10.1063/5.0049493","DOIUrl":"https://doi.org/10.1063/5.0049493","url":null,"abstract":"This paper reports an analytical and numerical study of double-diffusive mixed convection in a non-Newtonian power-law fluid contained in a double lid driven horizontal rectangular enclosure submitted to uniform heat and mass fluxes along its short vertical sides, while the horizontal ones are insulated and impermeable. The first part from this study is devoted to the numerical solution of the governing equations, and the effect of the governing parameters, namely, flow behavior index for a power law fluid at the reference temperature and Lewis numbers, is examined. In the second part, an analytical solution, based on the parallel flow approximation in the case of a shallow cavity A ≫ 1, is proposed and a good agreement is found between the two types of solutions.","PeriodicalId":330229,"journal":{"name":"AMT2020: THE 6TH INTERNATIONAL CONGRESS ON THERMAL SCIENCES","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121109259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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