Pub Date : 2023-11-08DOI: 10.37394/232013.2023.18.13
Abayomi S. Oke, Belindar A. Juma, Anselm O. Oyem
Carbon nanotubes (CNTs) and graphenes possess the properties that make them the future of armory in the military. Bullet-proof vests, for instance, are indispensable components of any military arsenal whose maintenance cost and weight can be drastically reduced if the materials are changed to CNT and graphenes. The purpose of this study is to investigate heat and mass transport phenomena in the hydromagnetic flow of Casson fluid suspending carbon nanotubes and graphene nanoparticles in armory production. An appropriate model is developed, taking into account the Buongiorno model and the effect of heat radiation. Using similarity variables, the model is reformulated into a dimensionless form. The numerical solution to the dimensionless model is obtained using the three-stage Lobatto IIIa finite difference approach, which is programmed into the MATLAB bvp4c package. The study reveals that an increase in the Casson fluid parameter leads to a decrease in the velocity profiles. There is a 78.41% reduction in skin friction when results are compared with the CNT-water nanofluid.
{"title":"Hydromagnetic Flow of Casson Fluid Carrying CNT and Graphene Nanoparticles in Armory Production","authors":"Abayomi S. Oke, Belindar A. Juma, Anselm O. Oyem","doi":"10.37394/232013.2023.18.13","DOIUrl":"https://doi.org/10.37394/232013.2023.18.13","url":null,"abstract":"Carbon nanotubes (CNTs) and graphenes possess the properties that make them the future of armory in the military. Bullet-proof vests, for instance, are indispensable components of any military arsenal whose maintenance cost and weight can be drastically reduced if the materials are changed to CNT and graphenes. The purpose of this study is to investigate heat and mass transport phenomena in the hydromagnetic flow of Casson fluid suspending carbon nanotubes and graphene nanoparticles in armory production. An appropriate model is developed, taking into account the Buongiorno model and the effect of heat radiation. Using similarity variables, the model is reformulated into a dimensionless form. The numerical solution to the dimensionless model is obtained using the three-stage Lobatto IIIa finite difference approach, which is programmed into the MATLAB bvp4c package. The study reveals that an increase in the Casson fluid parameter leads to a decrease in the velocity profiles. There is a 78.41% reduction in skin friction when results are compared with the CNT-water nanofluid.","PeriodicalId":39418,"journal":{"name":"WSEAS Transactions on Fluid Mechanics","volume":"44 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135342268","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}
Pub Date : 2023-11-01DOI: 10.37394/232013.2023.18.11
D. V. Voronin
A numerical simulation of continuous gas detonation in the combustion chamber based on the Navier-Stokes equations, taking into account turbulence and diffusion of substances, is carried out. A comparative analysis of the efficiency of detonation combustion of fuel depending on the geometric parameters of the chambers is performed. Three possible camera types are considered. Fuel and oxidizer were fed separately into the chambers through nozzles at a certain angle to the chamber surface. The detonation process was largely determined by the intensity of the turbulent mixing of reagents (hydrogen and oxygen). Calculations show that the type of camera with a flat radial geometry is the most optimal to establish a stable detonation regime.
{"title":"On the Optimal Choice of Type of Combustion Chamber for the Initiation of Gas Detonation","authors":"D. V. Voronin","doi":"10.37394/232013.2023.18.11","DOIUrl":"https://doi.org/10.37394/232013.2023.18.11","url":null,"abstract":"A numerical simulation of continuous gas detonation in the combustion chamber based on the Navier-Stokes equations, taking into account turbulence and diffusion of substances, is carried out. A comparative analysis of the efficiency of detonation combustion of fuel depending on the geometric parameters of the chambers is performed. Three possible camera types are considered. Fuel and oxidizer were fed separately into the chambers through nozzles at a certain angle to the chamber surface. The detonation process was largely determined by the intensity of the turbulent mixing of reagents (hydrogen and oxygen). Calculations show that the type of camera with a flat radial geometry is the most optimal to establish a stable detonation regime.","PeriodicalId":39418,"journal":{"name":"WSEAS Transactions on Fluid Mechanics","volume":"19 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135272054","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}
Pub Date : 2023-11-01DOI: 10.37394/232013.2023.18.12
Guilherme S. Teixeira, Marco D. De Campos
In the last 30 years, Computational Fluid Dynamics use in Wind Engineering has allowed researchers to raise its capabilities, and, little by little, it is becoming a reasonable tool because of the availability of high‐performance computers with large storage capacities. This work offers a short guide to the twelve tips computer beginners can take on the Ansys in building wind action applications.
{"title":"Best Practice Guidelines on the Ansys in Building Wind Action Applications","authors":"Guilherme S. Teixeira, Marco D. De Campos","doi":"10.37394/232013.2023.18.12","DOIUrl":"https://doi.org/10.37394/232013.2023.18.12","url":null,"abstract":"In the last 30 years, Computational Fluid Dynamics use in Wind Engineering has allowed researchers to raise its capabilities, and, little by little, it is becoming a reasonable tool because of the availability of high‐performance computers with large storage capacities. This work offers a short guide to the twelve tips computer beginners can take on the Ansys in building wind action applications.","PeriodicalId":39418,"journal":{"name":"WSEAS Transactions on Fluid Mechanics","volume":"24 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135272213","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}
Pub Date : 2023-10-16DOI: 10.37394/232013.2023.18.10
Mohamed R. Gomaa, Read Ahmad, M. A. Nawafleh
Concentrated solar power (CSP) is one of the main technologies used. Thus, the object of research is the different concentrated solar power technologies. Moreover, this study aimed to compare the different concentrated solar power technologies in terms of their efficiency, cost, concentration ratio, and receiver temperature. Results showed that technologies were arranged according to high to low temperatures: the parabolic dish reflector, central receiver collector, linear Fresnel reflector, and parabolic trough collector. As well as, in this study, ranges of the heat transfer fluids are compared with each other by using exergy and energy analysis. The heat transfer fluids that are examined are liquid sodium, molten salt (60 % NaNO3, 40 % KNO3), supercritical carbon dioxide (sCO2), water/steam, and air. Results showed that the liquid sodium at an elevated temperature range of (540–740 °C) is performed the best, with exergy efficiency of 61% of solar-to-fluid, the best liquid sodium case is at (do=10.3 mm, nbanks = 1, Δprec= 7.72 bar, ηΠ = 45.47 %) has been found. Finally, vas a positive and effective approach to solving the energy problems.
{"title":"Evaluation of Concentrated Solar Power Systems and the Impact of Different Heat Transfer Fluids on Performance","authors":"Mohamed R. Gomaa, Read Ahmad, M. A. Nawafleh","doi":"10.37394/232013.2023.18.10","DOIUrl":"https://doi.org/10.37394/232013.2023.18.10","url":null,"abstract":"Concentrated solar power (CSP) is one of the main technologies used. Thus, the object of research is the different concentrated solar power technologies. Moreover, this study aimed to compare the different concentrated solar power technologies in terms of their efficiency, cost, concentration ratio, and receiver temperature. Results showed that technologies were arranged according to high to low temperatures: the parabolic dish reflector, central receiver collector, linear Fresnel reflector, and parabolic trough collector. As well as, in this study, ranges of the heat transfer fluids are compared with each other by using exergy and energy analysis. The heat transfer fluids that are examined are liquid sodium, molten salt (60 % NaNO3, 40 % KNO3), supercritical carbon dioxide (sCO2), water/steam, and air. Results showed that the liquid sodium at an elevated temperature range of (540–740 °C) is performed the best, with exergy efficiency of 61% of solar-to-fluid, the best liquid sodium case is at (do=10.3 mm, nbanks = 1, Δprec= 7.72 bar, ηΠ = 45.47 %) has been found. Finally, vas a positive and effective approach to solving the energy problems.","PeriodicalId":39418,"journal":{"name":"WSEAS Transactions on Fluid Mechanics","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136113369","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}
Pub Date : 2023-10-13DOI: 10.37394/232013.2023.18.9
Sotirios J. Tampouris, Antonios X. Moronis
Electrohydrodynamic (EHD) fluid pumps generate physical flux in a dielectric fluid without using any moving parts. The advantages of EHD pumps are implemented in a wide variety of applications especially when miniaturization and/or noise absence are required, such as in cooling applications. Research efforts focus on improving existing concepts of efficiency optimization. Researchers are recently considering the concept of cascading stages, among other options. In this research, an experimental investigation of a two-stage wire-to-mesh EHD air pump has been made, providing information on the air velocity generated and the electrical power demand. Based on the testing results, a two-stage cascading EHD pump has significantly higher airflow velocity and efficiency than the conventional single-stage design. The two-stage structure was found to preserve the advantages of EHD pumping technology while being directly comparable in terms of EHD flow characteristics with conventional mechanical fans of similar dimensions.
{"title":"A Two-Stage Electrohydrodynamic Gas Pump in a Rectangular Channel","authors":"Sotirios J. Tampouris, Antonios X. Moronis","doi":"10.37394/232013.2023.18.9","DOIUrl":"https://doi.org/10.37394/232013.2023.18.9","url":null,"abstract":"Electrohydrodynamic (EHD) fluid pumps generate physical flux in a dielectric fluid without using any moving parts. The advantages of EHD pumps are implemented in a wide variety of applications especially when miniaturization and/or noise absence are required, such as in cooling applications. Research efforts focus on improving existing concepts of efficiency optimization. Researchers are recently considering the concept of cascading stages, among other options. In this research, an experimental investigation of a two-stage wire-to-mesh EHD air pump has been made, providing information on the air velocity generated and the electrical power demand. Based on the testing results, a two-stage cascading EHD pump has significantly higher airflow velocity and efficiency than the conventional single-stage design. The two-stage structure was found to preserve the advantages of EHD pumping technology while being directly comparable in terms of EHD flow characteristics with conventional mechanical fans of similar dimensions.","PeriodicalId":39418,"journal":{"name":"WSEAS Transactions on Fluid Mechanics","volume":"256 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135859138","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}
Pub Date : 2023-10-11DOI: 10.37394/232013.2023.18.8
Jacob Nagler
The current paper presents a finite element method (FEM) axisymmetric solution based on commercial software for an isotropic closed-ended container filled with fluid, located in the triple point phase (liquefied gas) while being converted into gas through a phase transition to critical point phase by a simultaneously rapid change of pressure and temperature to their critical values. The whole chemical process will be simulated through thermo-elastic analysis that is controlled by temperature-displacement dynamic coupling and subjected to step function boundary conditions alongside liquefied triple point initial conditions. In the process, the maximum principal stresses will be determined and illustrated as dependent on the container thickness. In the process, investigation will be carried out for prominent parameters, like, container hollow geometry type (spherical, ellipsoidal, and cylindrical) and raw material of the container. Commercial software solution calibration against existing literature solutions has been performed. Also, the solution accuracy was examined by element size mesh analysis to be coherent. In conclusion, the best materials to use were Molybdenum TZM and Tungsten while the preferred shape is the ellipsoidal shape. However, a typical vessel that is still durable with sufficient thermal strength for gas storage purposes is a cylinder body container with spherical ended cups made from Aluminum 6061 T6.
{"title":"On the Thermoelastic Influence of Fluid-Gas Phase Transition Pressure on the Closed Structural Storage Container","authors":"Jacob Nagler","doi":"10.37394/232013.2023.18.8","DOIUrl":"https://doi.org/10.37394/232013.2023.18.8","url":null,"abstract":"The current paper presents a finite element method (FEM) axisymmetric solution based on commercial software for an isotropic closed-ended container filled with fluid, located in the triple point phase (liquefied gas) while being converted into gas through a phase transition to critical point phase by a simultaneously rapid change of pressure and temperature to their critical values. The whole chemical process will be simulated through thermo-elastic analysis that is controlled by temperature-displacement dynamic coupling and subjected to step function boundary conditions alongside liquefied triple point initial conditions. In the process, the maximum principal stresses will be determined and illustrated as dependent on the container thickness. In the process, investigation will be carried out for prominent parameters, like, container hollow geometry type (spherical, ellipsoidal, and cylindrical) and raw material of the container. Commercial software solution calibration against existing literature solutions has been performed. Also, the solution accuracy was examined by element size mesh analysis to be coherent. In conclusion, the best materials to use were Molybdenum TZM and Tungsten while the preferred shape is the ellipsoidal shape. However, a typical vessel that is still durable with sufficient thermal strength for gas storage purposes is a cylinder body container with spherical ended cups made from Aluminum 6061 T6.","PeriodicalId":39418,"journal":{"name":"WSEAS Transactions on Fluid Mechanics","volume":"244 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136062430","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}
Pub Date : 2023-10-06DOI: 10.37394/232013.2023.18.7
D. Kasiteropoulou
The turbulent characteristics of the flow in open channels with gabion walls are studied numerically. Two trapezoidal and one orthogonal channel are used along with four different heights: 100mm, 150mm, 200mm, and 250mm of sand roughness in the gabion walls. Calculations of velocity, pressure, turbulence kinetic energy and eddy viscosity show clearly that the presence of the roughness affect considerably the fluid motion. As expected, the rough elements affect the mean velocity inside the channel and near the walls. Near the solid walls, the velocity profile is significantly affected and sharply lower velocities are observed very close to the walls.
{"title":"A Study of Flow in Open Orthogonal and Trapezoidal Channels with Gabion Walls","authors":"D. Kasiteropoulou","doi":"10.37394/232013.2023.18.7","DOIUrl":"https://doi.org/10.37394/232013.2023.18.7","url":null,"abstract":"The turbulent characteristics of the flow in open channels with gabion walls are studied numerically. Two trapezoidal and one orthogonal channel are used along with four different heights: 100mm, 150mm, 200mm, and 250mm of sand roughness in the gabion walls. Calculations of velocity, pressure, turbulence kinetic energy and eddy viscosity show clearly that the presence of the roughness affect considerably the fluid motion. As expected, the rough elements affect the mean velocity inside the channel and near the walls. Near the solid walls, the velocity profile is significantly affected and sharply lower velocities are observed very close to the walls.","PeriodicalId":39418,"journal":{"name":"WSEAS Transactions on Fluid Mechanics","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135352535","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}
Pub Date : 2023-10-06DOI: 10.37394/232013.2023.18.5
Hocine Hares, Ghazali Mebarki
The aerodynamic performance of an aircraft mainly depends on the lift force, drag force, and the lift to drag ratio. The geometric shapes of aircraft wings are considered crucial for this aerodynamic performance. The purpose of this study is to determine the most efficient wing shape that improves the aerodynamic performance of the airfoil. For that purpose, a numerical comparative study was carried out between the rectangular and tapered wing shapes of the NACA 4412 airfoil for a wide range of angles of attack in the subsonic regime. ANSYS Fluent software, based on the finite volume method, was used for the numerical resolution of the governing equations. The Realizable k-ε model was chosen for the turbulence modeling. The numerical procedure was validated based on experimental results obtained from the literature. The results show an improvement in the lift coefficient and a reduction in the drag coefficient of the Tapered shape compared to the rectangular shape at all angles of attack. However, a gain was achieved in the lift-to-drag coefficient ratio of the Tapered shape.
{"title":"Influence of Wing Shape on Airfoil Performance: a Comparative Study","authors":"Hocine Hares, Ghazali Mebarki","doi":"10.37394/232013.2023.18.5","DOIUrl":"https://doi.org/10.37394/232013.2023.18.5","url":null,"abstract":"The aerodynamic performance of an aircraft mainly depends on the lift force, drag force, and the lift to drag ratio. The geometric shapes of aircraft wings are considered crucial for this aerodynamic performance. The purpose of this study is to determine the most efficient wing shape that improves the aerodynamic performance of the airfoil. For that purpose, a numerical comparative study was carried out between the rectangular and tapered wing shapes of the NACA 4412 airfoil for a wide range of angles of attack in the subsonic regime. ANSYS Fluent software, based on the finite volume method, was used for the numerical resolution of the governing equations. The Realizable k-ε model was chosen for the turbulence modeling. The numerical procedure was validated based on experimental results obtained from the literature. The results show an improvement in the lift coefficient and a reduction in the drag coefficient of the Tapered shape compared to the rectangular shape at all angles of attack. However, a gain was achieved in the lift-to-drag coefficient ratio of the Tapered shape.","PeriodicalId":39418,"journal":{"name":"WSEAS Transactions on Fluid Mechanics","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135351781","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}
Pub Date : 2023-10-06DOI: 10.37394/232013.2023.18.6
Pardeep Kumar
Background: Thermal convection is the most convective instability when crystals are produced from a single element like silicon and the thermal instability of a fluid layer heated from below plays an important role in geophysics, oceanography, atmospheric physics, etc. The flow through porous media is of considerable interest for petroleum engineers, for geophysical fluid dynamicists and has importance in chemical technology and industry. Many of the flow problems in fluids with couple-stresses indicate some possible experiments, that could be used for determining the material constants, and the results are found to differ from those of Newtonian fluid. Keeping this in view, the present work was to study the effect of a uniform vertical magnetic field on the couple-stress fluid heated from below in the presence of a uniform vertical rotation through permeable media. Methodology: The present problem is studied using the linearized stability theory, Boussinesq approximation, normal mode analysis, and the dispersion relation is obtained. Results: The stationary convection, stability of the system, and oscillatory modes are discussed. In the case of stationary convection, the rotation postpones the onset of convection. The magnetic field and couple-stress may hasten the onset of convection in the presence of rotation while in the absence of rotation; they always postpone the onset of convection. The medium permeability hastens the onset of convection in the absence of rotation while in the presence of rotation, it may postpone the onset of convection. The rotation and magnetic field are found to introduce oscillatory modes in the system which was non-existent in their absence. A sufficient condition for the non-existence of overstability is also obtained.
{"title":"Magneto-Rotatory Convection in Couple-Stress Fluid","authors":"Pardeep Kumar","doi":"10.37394/232013.2023.18.6","DOIUrl":"https://doi.org/10.37394/232013.2023.18.6","url":null,"abstract":"Background: Thermal convection is the most convective instability when crystals are produced from a single element like silicon and the thermal instability of a fluid layer heated from below plays an important role in geophysics, oceanography, atmospheric physics, etc. The flow through porous media is of considerable interest for petroleum engineers, for geophysical fluid dynamicists and has importance in chemical technology and industry. Many of the flow problems in fluids with couple-stresses indicate some possible experiments, that could be used for determining the material constants, and the results are found to differ from those of Newtonian fluid. Keeping this in view, the present work was to study the effect of a uniform vertical magnetic field on the couple-stress fluid heated from below in the presence of a uniform vertical rotation through permeable media. Methodology: The present problem is studied using the linearized stability theory, Boussinesq approximation, normal mode analysis, and the dispersion relation is obtained. Results: The stationary convection, stability of the system, and oscillatory modes are discussed. In the case of stationary convection, the rotation postpones the onset of convection. The magnetic field and couple-stress may hasten the onset of convection in the presence of rotation while in the absence of rotation; they always postpone the onset of convection. The medium permeability hastens the onset of convection in the absence of rotation while in the presence of rotation, it may postpone the onset of convection. The rotation and magnetic field are found to introduce oscillatory modes in the system which was non-existent in their absence. A sufficient condition for the non-existence of overstability is also obtained.","PeriodicalId":39418,"journal":{"name":"WSEAS Transactions on Fluid Mechanics","volume":"299 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135352533","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}
Pub Date : 2023-07-27DOI: 10.37394/232013.2023.18.4
S. Salawu, H. Ogunseye, T. A. Yusuf, R. S. Lebelo, R. Mustapha
The current study is designed to model the hydrothermal feature of a hybrid nano liquid slip flows over a permeable expanding/contracting surface with entropy generation. The model incorporates Cu-Al2O3 nanoparticles with water as the host liquid to simulate the flow. Additional impacts incorporated into the novelty of the model are viscous dissipation and Joule heating. The model is transformed appropriately to its dimensionless form using similarity quantities and the solution is numerically obtained using the spectral quasi-linearization method (SQLM). The impact of pertinent factors on the flow characteristics is communicated through graphs for the hybrid nano-suspension to discuss the hydrothermal variations. The friction factor and the rate of heat transport are also discussed with sensible judgment through tables. To ensure the code validity, a comparison with earlier studies is conducted and excellent consensus is accomplished. The result explored that diminution in the irreversibility ratio is witnessed for rising magnetic field strength along the free stream, distance away from the permeable surface as the heat dissipation to the surrounding decelerates. Also, the augmented nonlinearity parameter intensified the heat transfer rate for about 2.79% of the hybrid nano-suspension.
{"title":"Entropy Generation in a Magnetohydrodynamic Hybrid Nanofluid Flow over a Nonlinear Permeable Surface with Velocity Slip Effect","authors":"S. Salawu, H. Ogunseye, T. A. Yusuf, R. S. Lebelo, R. Mustapha","doi":"10.37394/232013.2023.18.4","DOIUrl":"https://doi.org/10.37394/232013.2023.18.4","url":null,"abstract":"The current study is designed to model the hydrothermal feature of a hybrid nano liquid slip flows over a permeable expanding/contracting surface with entropy generation. The model incorporates Cu-Al2O3 nanoparticles with water as the host liquid to simulate the flow. Additional impacts incorporated into the novelty of the model are viscous dissipation and Joule heating. The model is transformed appropriately to its dimensionless form using similarity quantities and the solution is numerically obtained using the spectral quasi-linearization method (SQLM). The impact of pertinent factors on the flow characteristics is communicated through graphs for the hybrid nano-suspension to discuss the hydrothermal variations. The friction factor and the rate of heat transport are also discussed with sensible judgment through tables. To ensure the code validity, a comparison with earlier studies is conducted and excellent consensus is accomplished. The result explored that diminution in the irreversibility ratio is witnessed for rising magnetic field strength along the free stream, distance away from the permeable surface as the heat dissipation to the surrounding decelerates. Also, the augmented nonlinearity parameter intensified the heat transfer rate for about 2.79% of the hybrid nano-suspension.","PeriodicalId":39418,"journal":{"name":"WSEAS Transactions on Fluid Mechanics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42830397","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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