Pub Date : 2024-02-06DOI: 10.1177/23977914231214860
B. Jha, P. Malgwi
The present analysis is concerned with the effect of magnetic field inclination on transient MHD flow of Newtonian viscous fluid in a vertical microchannel with the consideration of Hall and ion slip currents as well as induced magnetic field effects. Obtained dimensional partial differential equation are rendered dimensionless by employing suitable parameters and thereafter solved numerically in MATLAB. Relevant actions of parameters on different flow features are depicted explicitly and also using Tables for various applicable parameters. Analysis in this direction is relevant in many MHD controlled applications. Results obtained from the present analysis shows that at the early stages of time and in the simultaneous occurrence of inclined magnetic field as well as Hall and ion slip currents, velocity and induced magnetic field behavior are found to be oscillatory all through the microchannel domain.
{"title":"Computational analysis on transient MHD free convection flow in a microchannel in presence of inclined magnetic field with Hall and ion slip current","authors":"B. Jha, P. Malgwi","doi":"10.1177/23977914231214860","DOIUrl":"https://doi.org/10.1177/23977914231214860","url":null,"abstract":"The present analysis is concerned with the effect of magnetic field inclination on transient MHD flow of Newtonian viscous fluid in a vertical microchannel with the consideration of Hall and ion slip currents as well as induced magnetic field effects. Obtained dimensional partial differential equation are rendered dimensionless by employing suitable parameters and thereafter solved numerically in MATLAB. Relevant actions of parameters on different flow features are depicted explicitly and also using Tables for various applicable parameters. Analysis in this direction is relevant in many MHD controlled applications. Results obtained from the present analysis shows that at the early stages of time and in the simultaneous occurrence of inclined magnetic field as well as Hall and ion slip currents, velocity and induced magnetic field behavior are found to be oscillatory all through the microchannel domain.","PeriodicalId":516661,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part N: Journal of Nanomaterials, Nanoengineering and Nanosystems","volume":"441 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139860332","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 : 2024-02-06DOI: 10.1177/23977914231217921
Lipsamayee Mishra, T. R. Mahapatra, Debadutta Mishra, P. Mishra, Pratap Chandra Padhi
Accurate estimation of the influence of process parameters on the drilled hole quality is imperative for reducing the defects like the taper and the microstructural changes around the holes are frequently encountered during the processing of advanced composite materials involving the laser drilling operations. In this work, the Nd:YAG laser micro-drilling of graphite powder (GP)/Epoxy and carbon black (CB)/Epoxy nanocomposites is performed. The impact of lamp current, cutting speed, assisted air pressure, pulse frequency, and band width on the hole quality attributes, specifically the heat affected zone (HAZ), taper and rate of material removal (RMR) are investigated. The experimentations are planned as per Taguchi’s standardized design and contemporary meta-heuristic accelerated particle swarm optimization (APSO) algorithm and the Whale optimization algorithm (WOA) have been utilized to define optimum controllable process parameters. The assortment of the acquired optimum conditions are justified by performing confirmatory tests. GP/Epoxy composites outperform CB/Epoxy composites in terms of hole quality. For single-objective optimization, improvements in taper, HAZ, and RMR for GP/Epoxy and CB/Epoxy nanocomposites are (14.47%, 10.54%, and 16.86%) and (14.64%, 12.72%, and 24.90%), respectively. In multi-performance optimization, WOA exhibits the least error compared to actual values and leads to improved taper (32.64%, 1.29%) and HAZ (10.58%, 10.09%) in GP/Epoxy and CB/Epoxy nanocomposites.
{"title":"Study of Nd:YAG laser micro-drilling machinability and parametric optimization of graphite/Epoxy and carbon black/Epoxy nanocomposites","authors":"Lipsamayee Mishra, T. R. Mahapatra, Debadutta Mishra, P. Mishra, Pratap Chandra Padhi","doi":"10.1177/23977914231217921","DOIUrl":"https://doi.org/10.1177/23977914231217921","url":null,"abstract":"Accurate estimation of the influence of process parameters on the drilled hole quality is imperative for reducing the defects like the taper and the microstructural changes around the holes are frequently encountered during the processing of advanced composite materials involving the laser drilling operations. In this work, the Nd:YAG laser micro-drilling of graphite powder (GP)/Epoxy and carbon black (CB)/Epoxy nanocomposites is performed. The impact of lamp current, cutting speed, assisted air pressure, pulse frequency, and band width on the hole quality attributes, specifically the heat affected zone (HAZ), taper and rate of material removal (RMR) are investigated. The experimentations are planned as per Taguchi’s standardized design and contemporary meta-heuristic accelerated particle swarm optimization (APSO) algorithm and the Whale optimization algorithm (WOA) have been utilized to define optimum controllable process parameters. The assortment of the acquired optimum conditions are justified by performing confirmatory tests. GP/Epoxy composites outperform CB/Epoxy composites in terms of hole quality. For single-objective optimization, improvements in taper, HAZ, and RMR for GP/Epoxy and CB/Epoxy nanocomposites are (14.47%, 10.54%, and 16.86%) and (14.64%, 12.72%, and 24.90%), respectively. In multi-performance optimization, WOA exhibits the least error compared to actual values and leads to improved taper (32.64%, 1.29%) and HAZ (10.58%, 10.09%) in GP/Epoxy and CB/Epoxy nanocomposites.","PeriodicalId":516661,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part N: Journal of Nanomaterials, Nanoengineering and Nanosystems","volume":"5 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139801153","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 : 2024-02-06DOI: 10.1177/23977914231217470
K. Swain, K. S. Nisar
The unsteady two-directional flow of a non-Newtonian magneto-Casson nanoliquid flow over an elongated flat surface with the porous matrix is investigated. The flow is subjected to space-based exponential heat generation/absorption (ESHS), thermophoresis, Brownian motion of nanoparticles, and transverse magnetic field. Within the base fluid, the diffusion of chemically reactive nanoparticles is assumed to be highly significant; hence considered. The governing equations of the flow model admit self-similar equations and are numerically solved by employing the Runge-Kutta-based shooting technique (RKSM). The significance of key parameters on the temperature, velocity, friction factor at the surface, heat transfer rate, and mass transfer rate distributions is analyzed. The use of high-Prandtl number base fluid and nanoparticles of high thermal conductivity could be of practical use to increase the heat transfer rate and avoid nanoparticle accumulation. The occurrence of nanoparticles in the operating liquids reduces the shearing stress at the plate surface to avoid backflow.
{"title":"Time-dependent stagnation point flow of nano Casson fluid with Joule heating over an elongated surface subjected to viscous heating and exponential space-based heat source/sink: Boungiorno model","authors":"K. Swain, K. S. Nisar","doi":"10.1177/23977914231217470","DOIUrl":"https://doi.org/10.1177/23977914231217470","url":null,"abstract":"The unsteady two-directional flow of a non-Newtonian magneto-Casson nanoliquid flow over an elongated flat surface with the porous matrix is investigated. The flow is subjected to space-based exponential heat generation/absorption (ESHS), thermophoresis, Brownian motion of nanoparticles, and transverse magnetic field. Within the base fluid, the diffusion of chemically reactive nanoparticles is assumed to be highly significant; hence considered. The governing equations of the flow model admit self-similar equations and are numerically solved by employing the Runge-Kutta-based shooting technique (RKSM). The significance of key parameters on the temperature, velocity, friction factor at the surface, heat transfer rate, and mass transfer rate distributions is analyzed. The use of high-Prandtl number base fluid and nanoparticles of high thermal conductivity could be of practical use to increase the heat transfer rate and avoid nanoparticle accumulation. The occurrence of nanoparticles in the operating liquids reduces the shearing stress at the plate surface to avoid backflow.","PeriodicalId":516661,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part N: Journal of Nanomaterials, Nanoengineering and Nanosystems","volume":"101 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139859527","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 : 2024-02-06DOI: 10.1177/23977914231217470
K. Swain, K. S. Nisar
The unsteady two-directional flow of a non-Newtonian magneto-Casson nanoliquid flow over an elongated flat surface with the porous matrix is investigated. The flow is subjected to space-based exponential heat generation/absorption (ESHS), thermophoresis, Brownian motion of nanoparticles, and transverse magnetic field. Within the base fluid, the diffusion of chemically reactive nanoparticles is assumed to be highly significant; hence considered. The governing equations of the flow model admit self-similar equations and are numerically solved by employing the Runge-Kutta-based shooting technique (RKSM). The significance of key parameters on the temperature, velocity, friction factor at the surface, heat transfer rate, and mass transfer rate distributions is analyzed. The use of high-Prandtl number base fluid and nanoparticles of high thermal conductivity could be of practical use to increase the heat transfer rate and avoid nanoparticle accumulation. The occurrence of nanoparticles in the operating liquids reduces the shearing stress at the plate surface to avoid backflow.
{"title":"Time-dependent stagnation point flow of nano Casson fluid with Joule heating over an elongated surface subjected to viscous heating and exponential space-based heat source/sink: Boungiorno model","authors":"K. Swain, K. S. Nisar","doi":"10.1177/23977914231217470","DOIUrl":"https://doi.org/10.1177/23977914231217470","url":null,"abstract":"The unsteady two-directional flow of a non-Newtonian magneto-Casson nanoliquid flow over an elongated flat surface with the porous matrix is investigated. The flow is subjected to space-based exponential heat generation/absorption (ESHS), thermophoresis, Brownian motion of nanoparticles, and transverse magnetic field. Within the base fluid, the diffusion of chemically reactive nanoparticles is assumed to be highly significant; hence considered. The governing equations of the flow model admit self-similar equations and are numerically solved by employing the Runge-Kutta-based shooting technique (RKSM). The significance of key parameters on the temperature, velocity, friction factor at the surface, heat transfer rate, and mass transfer rate distributions is analyzed. The use of high-Prandtl number base fluid and nanoparticles of high thermal conductivity could be of practical use to increase the heat transfer rate and avoid nanoparticle accumulation. The occurrence of nanoparticles in the operating liquids reduces the shearing stress at the plate surface to avoid backflow.","PeriodicalId":516661,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part N: Journal of Nanomaterials, Nanoengineering and Nanosystems","volume":"166 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139799814","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 : 2024-02-06DOI: 10.1177/23977914231217920
Arman Salehi, Samrand Rash-Ahmadi
In the last decade, graphene has found a wide role and application in nanocomposites and nanodevices for its extraordinary properties. However, due to its low fracture toughness and brittleness, graphene is brittle, and crack growth occurs rapidly. As a result, crack growth behavior and control of its progression are important. In this study, molecular dynamics modeling was used to investigate the crack growth behavior and mechanical properties in functionalized graphene (with middle and edge crack) with different oxide groups (hydroxyl, epoxide, and carboxyl) at different percentages of graphene oxide (0–3 wt. %). The results show that functionalized graphene with oxide groups changes the properties of graphene, effectively reducing the crack growth in crack length (4.9 Å), crack opening displacement (1.4 Å), tensile strength for edge crack (74 to 54 Gpa), and middle crack (128 to 63 Gpa). Also, carboxyl and epoxide groups have a greater reduction in crack growth rate, opening displacement growth rate, and stress concentration. In addition, increase in the number of atoms in oxide groups around the initial crack (with radius 13 Å) reduces crack growth rate, opening displacement growth rate, and stress concentration. This study provides a broader insight into crack growth behavior in functionalized graphene with oxide groups.
{"title":"Influence of oxygen functional groups on the crack growth behavior of graphene with edge and middle crack: A molecular dynamics study","authors":"Arman Salehi, Samrand Rash-Ahmadi","doi":"10.1177/23977914231217920","DOIUrl":"https://doi.org/10.1177/23977914231217920","url":null,"abstract":"In the last decade, graphene has found a wide role and application in nanocomposites and nanodevices for its extraordinary properties. However, due to its low fracture toughness and brittleness, graphene is brittle, and crack growth occurs rapidly. As a result, crack growth behavior and control of its progression are important. In this study, molecular dynamics modeling was used to investigate the crack growth behavior and mechanical properties in functionalized graphene (with middle and edge crack) with different oxide groups (hydroxyl, epoxide, and carboxyl) at different percentages of graphene oxide (0–3 wt. %). The results show that functionalized graphene with oxide groups changes the properties of graphene, effectively reducing the crack growth in crack length (4.9 Å), crack opening displacement (1.4 Å), tensile strength for edge crack (74 to 54 Gpa), and middle crack (128 to 63 Gpa). Also, carboxyl and epoxide groups have a greater reduction in crack growth rate, opening displacement growth rate, and stress concentration. In addition, increase in the number of atoms in oxide groups around the initial crack (with radius 13 Å) reduces crack growth rate, opening displacement growth rate, and stress concentration. This study provides a broader insight into crack growth behavior in functionalized graphene with oxide groups.","PeriodicalId":516661,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part N: Journal of Nanomaterials, Nanoengineering and Nanosystems","volume":"30 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139801725","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 : 2024-02-06DOI: 10.1177/23977914231217921
Lipsamayee Mishra, T. R. Mahapatra, Debadutta Mishra, P. Mishra, Pratap Chandra Padhi
Accurate estimation of the influence of process parameters on the drilled hole quality is imperative for reducing the defects like the taper and the microstructural changes around the holes are frequently encountered during the processing of advanced composite materials involving the laser drilling operations. In this work, the Nd:YAG laser micro-drilling of graphite powder (GP)/Epoxy and carbon black (CB)/Epoxy nanocomposites is performed. The impact of lamp current, cutting speed, assisted air pressure, pulse frequency, and band width on the hole quality attributes, specifically the heat affected zone (HAZ), taper and rate of material removal (RMR) are investigated. The experimentations are planned as per Taguchi’s standardized design and contemporary meta-heuristic accelerated particle swarm optimization (APSO) algorithm and the Whale optimization algorithm (WOA) have been utilized to define optimum controllable process parameters. The assortment of the acquired optimum conditions are justified by performing confirmatory tests. GP/Epoxy composites outperform CB/Epoxy composites in terms of hole quality. For single-objective optimization, improvements in taper, HAZ, and RMR for GP/Epoxy and CB/Epoxy nanocomposites are (14.47%, 10.54%, and 16.86%) and (14.64%, 12.72%, and 24.90%), respectively. In multi-performance optimization, WOA exhibits the least error compared to actual values and leads to improved taper (32.64%, 1.29%) and HAZ (10.58%, 10.09%) in GP/Epoxy and CB/Epoxy nanocomposites.
{"title":"Study of Nd:YAG laser micro-drilling machinability and parametric optimization of graphite/Epoxy and carbon black/Epoxy nanocomposites","authors":"Lipsamayee Mishra, T. R. Mahapatra, Debadutta Mishra, P. Mishra, Pratap Chandra Padhi","doi":"10.1177/23977914231217921","DOIUrl":"https://doi.org/10.1177/23977914231217921","url":null,"abstract":"Accurate estimation of the influence of process parameters on the drilled hole quality is imperative for reducing the defects like the taper and the microstructural changes around the holes are frequently encountered during the processing of advanced composite materials involving the laser drilling operations. In this work, the Nd:YAG laser micro-drilling of graphite powder (GP)/Epoxy and carbon black (CB)/Epoxy nanocomposites is performed. The impact of lamp current, cutting speed, assisted air pressure, pulse frequency, and band width on the hole quality attributes, specifically the heat affected zone (HAZ), taper and rate of material removal (RMR) are investigated. The experimentations are planned as per Taguchi’s standardized design and contemporary meta-heuristic accelerated particle swarm optimization (APSO) algorithm and the Whale optimization algorithm (WOA) have been utilized to define optimum controllable process parameters. The assortment of the acquired optimum conditions are justified by performing confirmatory tests. GP/Epoxy composites outperform CB/Epoxy composites in terms of hole quality. For single-objective optimization, improvements in taper, HAZ, and RMR for GP/Epoxy and CB/Epoxy nanocomposites are (14.47%, 10.54%, and 16.86%) and (14.64%, 12.72%, and 24.90%), respectively. In multi-performance optimization, WOA exhibits the least error compared to actual values and leads to improved taper (32.64%, 1.29%) and HAZ (10.58%, 10.09%) in GP/Epoxy and CB/Epoxy nanocomposites.","PeriodicalId":516661,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part N: Journal of Nanomaterials, Nanoengineering and Nanosystems","volume":"77 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139861137","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 : 2024-02-06DOI: 10.1177/23977914231217920
Arman Salehi, Samrand Rash-Ahmadi
In the last decade, graphene has found a wide role and application in nanocomposites and nanodevices for its extraordinary properties. However, due to its low fracture toughness and brittleness, graphene is brittle, and crack growth occurs rapidly. As a result, crack growth behavior and control of its progression are important. In this study, molecular dynamics modeling was used to investigate the crack growth behavior and mechanical properties in functionalized graphene (with middle and edge crack) with different oxide groups (hydroxyl, epoxide, and carboxyl) at different percentages of graphene oxide (0–3 wt. %). The results show that functionalized graphene with oxide groups changes the properties of graphene, effectively reducing the crack growth in crack length (4.9 Å), crack opening displacement (1.4 Å), tensile strength for edge crack (74 to 54 Gpa), and middle crack (128 to 63 Gpa). Also, carboxyl and epoxide groups have a greater reduction in crack growth rate, opening displacement growth rate, and stress concentration. In addition, increase in the number of atoms in oxide groups around the initial crack (with radius 13 Å) reduces crack growth rate, opening displacement growth rate, and stress concentration. This study provides a broader insight into crack growth behavior in functionalized graphene with oxide groups.
{"title":"Influence of oxygen functional groups on the crack growth behavior of graphene with edge and middle crack: A molecular dynamics study","authors":"Arman Salehi, Samrand Rash-Ahmadi","doi":"10.1177/23977914231217920","DOIUrl":"https://doi.org/10.1177/23977914231217920","url":null,"abstract":"In the last decade, graphene has found a wide role and application in nanocomposites and nanodevices for its extraordinary properties. However, due to its low fracture toughness and brittleness, graphene is brittle, and crack growth occurs rapidly. As a result, crack growth behavior and control of its progression are important. In this study, molecular dynamics modeling was used to investigate the crack growth behavior and mechanical properties in functionalized graphene (with middle and edge crack) with different oxide groups (hydroxyl, epoxide, and carboxyl) at different percentages of graphene oxide (0–3 wt. %). The results show that functionalized graphene with oxide groups changes the properties of graphene, effectively reducing the crack growth in crack length (4.9 Å), crack opening displacement (1.4 Å), tensile strength for edge crack (74 to 54 Gpa), and middle crack (128 to 63 Gpa). Also, carboxyl and epoxide groups have a greater reduction in crack growth rate, opening displacement growth rate, and stress concentration. In addition, increase in the number of atoms in oxide groups around the initial crack (with radius 13 Å) reduces crack growth rate, opening displacement growth rate, and stress concentration. This study provides a broader insight into crack growth behavior in functionalized graphene with oxide groups.","PeriodicalId":516661,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part N: Journal of Nanomaterials, Nanoengineering and Nanosystems","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139861668","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 : 2024-02-05DOI: 10.1177/23977914231223820
Mujeeb Ur Rahman, Fazal Haq, D. Abduvalieva
Entropy generation has gained consideration of researchers due to its applications. Applications of entropy occur in chillers, desert collars, refrigerators, and all type of heat transfer devices. Due to vast range of applications of entropy, in this study irreversibility in Sutterby nanofluid flow by stretchable cylinder is discussed. While reporting momentum equation magnetic field and mixed convection effects are considered. Influences of radiation, Joule heating, and heat source are deliberated in the expression for thermal energy. Chemical reaction impact is taken in the modeling of concentration equation. Irreversibility for the considered flow is obtained by utilizing thermodynamics second law. Dimensional partial differential equations (PDEs) representing the flow are transformed to dimensionless ordinary differential equations(ODEs) through similarity transformations. Solution of ODEs is obtained via NDSolve code of Mathematica. Impact of flow parameters on velocity, entropy, temperature, Bejan number, and concentration are studied graphically. Engineering quantities are analyzed numerically. It is noticed through achieved results that velocity drops for higher magnetic variable while upsurges for higher curvature variable. Thermal field boosts for higher magnetic and heat source parameter. For rising diffusion and radiation variables entropy improves.
{"title":"Mixed convection flow of radiated Sutterby nanofluid by stretchable cylinder with irreversibility and heat generation","authors":"Mujeeb Ur Rahman, Fazal Haq, D. Abduvalieva","doi":"10.1177/23977914231223820","DOIUrl":"https://doi.org/10.1177/23977914231223820","url":null,"abstract":"Entropy generation has gained consideration of researchers due to its applications. Applications of entropy occur in chillers, desert collars, refrigerators, and all type of heat transfer devices. Due to vast range of applications of entropy, in this study irreversibility in Sutterby nanofluid flow by stretchable cylinder is discussed. While reporting momentum equation magnetic field and mixed convection effects are considered. Influences of radiation, Joule heating, and heat source are deliberated in the expression for thermal energy. Chemical reaction impact is taken in the modeling of concentration equation. Irreversibility for the considered flow is obtained by utilizing thermodynamics second law. Dimensional partial differential equations (PDEs) representing the flow are transformed to dimensionless ordinary differential equations(ODEs) through similarity transformations. Solution of ODEs is obtained via NDSolve code of Mathematica. Impact of flow parameters on velocity, entropy, temperature, Bejan number, and concentration are studied graphically. Engineering quantities are analyzed numerically. It is noticed through achieved results that velocity drops for higher magnetic variable while upsurges for higher curvature variable. Thermal field boosts for higher magnetic and heat source parameter. For rising diffusion and radiation variables entropy improves.","PeriodicalId":516661,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part N: Journal of Nanomaterials, Nanoengineering and Nanosystems","volume":"23 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139866081","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 : 2024-02-05DOI: 10.1177/23977914231223820
Mujeeb Ur Rahman, Fazal Haq, D. Abduvalieva
Entropy generation has gained consideration of researchers due to its applications. Applications of entropy occur in chillers, desert collars, refrigerators, and all type of heat transfer devices. Due to vast range of applications of entropy, in this study irreversibility in Sutterby nanofluid flow by stretchable cylinder is discussed. While reporting momentum equation magnetic field and mixed convection effects are considered. Influences of radiation, Joule heating, and heat source are deliberated in the expression for thermal energy. Chemical reaction impact is taken in the modeling of concentration equation. Irreversibility for the considered flow is obtained by utilizing thermodynamics second law. Dimensional partial differential equations (PDEs) representing the flow are transformed to dimensionless ordinary differential equations(ODEs) through similarity transformations. Solution of ODEs is obtained via NDSolve code of Mathematica. Impact of flow parameters on velocity, entropy, temperature, Bejan number, and concentration are studied graphically. Engineering quantities are analyzed numerically. It is noticed through achieved results that velocity drops for higher magnetic variable while upsurges for higher curvature variable. Thermal field boosts for higher magnetic and heat source parameter. For rising diffusion and radiation variables entropy improves.
{"title":"Mixed convection flow of radiated Sutterby nanofluid by stretchable cylinder with irreversibility and heat generation","authors":"Mujeeb Ur Rahman, Fazal Haq, D. Abduvalieva","doi":"10.1177/23977914231223820","DOIUrl":"https://doi.org/10.1177/23977914231223820","url":null,"abstract":"Entropy generation has gained consideration of researchers due to its applications. Applications of entropy occur in chillers, desert collars, refrigerators, and all type of heat transfer devices. Due to vast range of applications of entropy, in this study irreversibility in Sutterby nanofluid flow by stretchable cylinder is discussed. While reporting momentum equation magnetic field and mixed convection effects are considered. Influences of radiation, Joule heating, and heat source are deliberated in the expression for thermal energy. Chemical reaction impact is taken in the modeling of concentration equation. Irreversibility for the considered flow is obtained by utilizing thermodynamics second law. Dimensional partial differential equations (PDEs) representing the flow are transformed to dimensionless ordinary differential equations(ODEs) through similarity transformations. Solution of ODEs is obtained via NDSolve code of Mathematica. Impact of flow parameters on velocity, entropy, temperature, Bejan number, and concentration are studied graphically. Engineering quantities are analyzed numerically. It is noticed through achieved results that velocity drops for higher magnetic variable while upsurges for higher curvature variable. Thermal field boosts for higher magnetic and heat source parameter. For rising diffusion and radiation variables entropy improves.","PeriodicalId":516661,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part N: Journal of Nanomaterials, Nanoengineering and Nanosystems","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139806079","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 : 2024-01-27DOI: 10.1177/23977914231217922
N. Shaheen, Muhammad Ramzan, C. Saleel, S. Kadry
This study aims to present non-similar solutions for the radiative Williamson nanofluid flow with a quadratic drag force effect over a horizontally extended surface. The sheet is extended along the X-axis, and the magnetic field is applied along the Y-axis, perpendicular to the flow. The Buongiorno nanofluid model is employed to incorporate the random dispersion and thermal characteristics of the nanofluid. The innovation in the proposed model lies in its consideration of the effects of viscous and ohmic dissipation, Robin boundary conditions, and higher-order chemical reactions. The governing equations for the flow are scaled down to the second level using an appropriate transformation combined with a non-similarity technique and computationally assessed using the MATLAB bvp4c algorithm. The significant influences of the dimensionless parameters on the velocity, thermal, and solutal fields are depicted graphically. The findings reveal that the fluid velocity diminishes with increasing Weissenberg and Hartmann numbers. The solutal field experiences a reduction with variations in the chemical reaction parameter, while it rises with an increase in the higher-order chemical reaction parameter. The wall heat transfer rate is augmented with higher Eckert and thermal Biot numbers. The mass transfer rate rises with higher values of the chemical reaction parameter, Schmidt number, and solutal Biot number. A comparison of the results from this study with previous research demonstrates strong agreement, affirming the validity of the proposed model. For the value of the Williamson parameter [Formula: see text], the percentage error of the present analysis with established studies is 0% and 0.096770%.
本研究旨在提出在水平延伸表面上具有二次阻力效应的辐射威廉姆森纳米流体流动的非相似解。薄片沿 X 轴延伸，磁场沿 Y 轴施加，垂直于流动。采用 Buongiorno 纳米流体模型纳入了纳米流体的随机分散和热特性。该模型的创新之处在于考虑了粘性和欧姆耗散、罗宾边界条件和高阶化学反应的影响。使用适当的转换结合非相似性技术，将流动的控制方程缩减到第二级，并使用 MATLAB bvp4c 算法进行计算评估。无量纲参数对速度场、热场和溶质场的重要影响以图表形式显示。研究结果表明，流体速度随着魏森堡数和哈特曼数的增加而减小。溶质场随着化学反应参数的变化而减小，而随着高阶化学反应参数的增加而增大。壁面传热速率随着埃克特数和热比奥特数的增大而增大。传质速率随化学反应参数、施密特数和溶质毕奥特数的数值增大而上升。将本研究的结果与之前的研究结果进行比较，结果表明两者非常吻合，从而肯定了所提模型的有效性。对于 Williamson 参数值[计算公式：见正文]，本分析与已有研究的误差百分比分别为 0% 和 0.096770%。
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