Fatah Boufoudi, S. Zouaoui, S. Mihoub, A. Benahmed, T. Tayebi
Nanofluids became an essential solution for the improvement of efficient heat transfer fluids. Thus, it’s necessary to optimize their propreties. This paper investigates the effect of the temperature and the volume fraction on the thermo-physical properties of different nanofluids (Mono and hybrid) such as: Density, thermal conductivity, dynamic viscosity, kinematic viscosity, heat capacity and enthalpy in various nanoparticule concentrations and operating temperature. Two nanoparticles Al2O3, CuO were added to three different conventional base fluids namely: Therminol VP-1; Sylthrem 800; Dowtherm A, with several volume fractions, and various temperatures (200–400 °C). A numerical model was developed using MATLAB software, to evaluate the behavior of each thermo-physical property of the nanofluid that can be used as a working fluid in CSP applications and compared with their conventional fluids. The results show an improvement in thermo-physical properties compared to pure fluids for an optimal value of 4% for Al2O3. Also, the increase in temperature plays an important role in the decrease in viscosity, and their influence on other properties has also been noticed while the addition of nanoparticles to the pure fluid allow to increase the thermal conductivity by 13%. Finally, the (Al2O3 + CuO/Dowtherm A) hybrid nanofluid sems to be attractive to use in CSP applications.
{"title":"Numerical Investigation of the (Mono-Hybrid) Nanofluid Thermophysical Properties for Concentrated Solar Power Plant","authors":"Fatah Boufoudi, S. Zouaoui, S. Mihoub, A. Benahmed, T. Tayebi","doi":"10.1166/jon.2023.2015","DOIUrl":"https://doi.org/10.1166/jon.2023.2015","url":null,"abstract":"Nanofluids became an essential solution for the improvement of efficient heat transfer fluids. Thus, it’s necessary to optimize their propreties. This paper investigates the effect of the temperature and the volume fraction on the thermo-physical properties of different nanofluids\u0000 (Mono and hybrid) such as: Density, thermal conductivity, dynamic viscosity, kinematic viscosity, heat capacity and enthalpy in various nanoparticule concentrations and operating temperature. Two nanoparticles Al2O3, CuO were added to three different conventional base\u0000 fluids namely: Therminol VP-1; Sylthrem 800; Dowtherm A, with several volume fractions, and various temperatures (200–400 °C). A numerical model was developed using MATLAB software, to evaluate the behavior of each thermo-physical property of the nanofluid that can be used as a working\u0000 fluid in CSP applications and compared with their conventional fluids. The results show an improvement in thermo-physical properties compared to pure fluids for an optimal value of 4% for Al2O3. Also, the increase in temperature plays an important role in the decrease\u0000 in viscosity, and their influence on other properties has also been noticed while the addition of nanoparticles to the pure fluid allow to increase the thermal conductivity by 13%. Finally, the (Al2O3 + CuO/Dowtherm A) hybrid nanofluid sems to be attractive to use in\u0000 CSP applications.","PeriodicalId":47161,"journal":{"name":"Journal of Nanofluids","volume":" ","pages":""},"PeriodicalIF":4.1,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48834846","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 study of heat transfer phenomena in non-similar flow of nanofluid is the subject of this investigation. The external retarded flow past a flat plate is considered which does not allow the self-similarity solution. To enhance the heat transfer rate nanofluid has been considered instead of the pure fluid. The nanoparticles of Aluminum Oxide are disseminated in the Water, being base fluid, to form the nanofluid. The consideration of nanofluid results in a substantial heat transfer augmentation along with the skin friction coefficient and both are observed to be further enhanced with higher concentration of nanoparticles. Almost 48% and 36% of gain in heat transfer rate and skin friction coefficient, respectively, have been observed in the 20% nanoparticle concentration at the downstream location where separation is occurring. However, a 67% gain in skin friction coefficient is observed for other downstream locations. The effect of nanoparticle concentration on the separation phenomena has also been investigated carefully and it is found that the concentration of nanoparticle does not delay the flow separation in this case. The effect of nanoparticle concentration on velocity and temperature profiles and their gradients is depicted and discussed through several graphs.
{"title":"Separation Phenomenon in a Forced Convection Non-Similar Externally Retarded Nanofluid Flow","authors":"A. Mehmood, M. Usman, S. Munawar, N. Saleem","doi":"10.1166/jon.2023.2017","DOIUrl":"https://doi.org/10.1166/jon.2023.2017","url":null,"abstract":"The study of heat transfer phenomena in non-similar flow of nanofluid is the subject of this investigation. The external retarded flow past a flat plate is considered which does not allow the self-similarity solution. To enhance the heat transfer rate nanofluid has been considered instead\u0000 of the pure fluid. The nanoparticles of Aluminum Oxide are disseminated in the Water, being base fluid, to form the nanofluid. The consideration of nanofluid results in a substantial heat transfer augmentation along with the skin friction coefficient and both are observed to be further enhanced\u0000 with higher concentration of nanoparticles. Almost 48% and 36% of gain in heat transfer rate and skin friction coefficient, respectively, have been observed in the 20% nanoparticle concentration at the downstream location where separation is occurring. However, a 67% gain in skin friction\u0000 coefficient is observed for other downstream locations. The effect of nanoparticle concentration on the separation phenomena has also been investigated carefully and it is found that the concentration of nanoparticle does not delay the flow separation in this case. The effect of nanoparticle\u0000 concentration on velocity and temperature profiles and their gradients is depicted and discussed through several graphs.","PeriodicalId":47161,"journal":{"name":"Journal of Nanofluids","volume":" ","pages":""},"PeriodicalIF":4.1,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43097183","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}
Nano particles, chemical reactions, and porous media are all used in this study to look at how thermal diffusion in addition diffusion thermo work together to affect liquid that is immiscible, slurries, but instead conducts electricity flow toward a vertical cone. There is a concentration equation and an energy equation for this question. There are thermal diffusion and chemical reaction effects in both of these equations. It is done by making use of correspondence transformations make governing dynamic system with optimization algorithms of the flow into Algebraic calculations that are quasi, which then statistically solved by means of the Rung-Kutta method, there are graphs in the findings and discussion section that show how different engineering factors can affect speed, features of temperature moreover concentration. Furthermore, consequences about these factors Nu and Sh statistics for skin friction quantity also discussed and as seen in tables. By comparing present results to data that has already been published, we can see that they are very accurate. Increases with in Brownian motion attribute as well as thermal diffusion attribute significantly raise its density boundary layer. It is indeed worth noting that as solute concentration as the condensation variable is increased, the penetration depth declines. That’s for the reason that the compound genomic dispersion decreases as the temperature rises. Kr as a result, values pertaining to Dufour numeral rise, Temperature profiles are similarly rises. Expansion Enhanced Nano fluid intensity dispersion as well as expanded the Thermal diffusion attribute reverse effect in the situation of Brownian locomotion effect, can be seen. These concentration profiles are increasing with rising values of Soret number parameter.
{"title":"Thermal Diffusion and Diffusion Thermo Effects on Chemically Reacting Nanofluid Flow Towards A Vertical Cone Filled by Porous Medium","authors":"M. Sathyanarayana, T. R. Goud","doi":"10.1166/jon.2023.2036","DOIUrl":"https://doi.org/10.1166/jon.2023.2036","url":null,"abstract":"Nano particles, chemical reactions, and porous media are all used in this study to look at how thermal diffusion in addition diffusion thermo work together to affect liquid that is immiscible, slurries, but instead conducts electricity flow toward a vertical cone. There is a concentration\u0000 equation and an energy equation for this question. There are thermal diffusion and chemical reaction effects in both of these equations. It is done by making use of correspondence transformations make governing dynamic system with optimization algorithms of the flow into Algebraic calculations\u0000 that are quasi, which then statistically solved by means of the Rung-Kutta method, there are graphs in the findings and discussion section that show how different engineering factors can affect speed, features of temperature moreover concentration. Furthermore, consequences about these factors\u0000 Nu and Sh statistics for skin friction quantity also discussed and as seen in tables. By comparing present results to data that has already been published, we can see that they are very accurate. Increases with in Brownian motion attribute as well as thermal diffusion attribute\u0000 significantly raise its density boundary layer. It is indeed worth noting that as solute concentration as the condensation variable is increased, the penetration depth declines. That’s for the reason that the compound genomic dispersion decreases as the temperature rises. Kr as\u0000 a result, values pertaining to Dufour numeral rise, Temperature profiles are similarly rises. Expansion Enhanced Nano fluid intensity dispersion as well as expanded the Thermal diffusion attribute reverse effect in the situation of Brownian locomotion effect, can be seen. These concentration\u0000 profiles are increasing with rising values of Soret number parameter.","PeriodicalId":47161,"journal":{"name":"Journal of Nanofluids","volume":" ","pages":""},"PeriodicalIF":4.1,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45338893","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 is centered on the numerical and analytical solution of a non-Newtonian Casson nanofluid flow problem in the presence of vertical magnetic field. Brownian motion and thermophoretic forces are introduced due to the addition of nanoparticles and; the magnetic field adds an extra Lorentz’s force term along with Maxwell’s equations. Using Normal mode technique, the system of PDEs with the corresponding boundary conditions is reduced to a system of ODEs. The Galerkin-type weighted residual method is used to get a numerical solution for the formulated differential system. Numerical simulation is carried out to make the investigation helpful for practical applications like nano-drug delivery systems as in clinical and medical research, magnets are extremely important to create three-dimensional images of anatomical and diagnostic importance from nuclear magnetic resonance signals. Comparisons of the numerical results with previously published results are made and fine agreements are noted for the considered values of the parameters. The impact of magnetic field, Casson parameter and nanoparticle parameters are discussed for different types of boundary conditions (free–free, rigid-free and rigid–rigid). The system is found to be the most stable for more realistic rigid–rigid boundaries out of three different boundaries. For the purpose of numerical computations, blood has been considered as the Casson nanofluid. The novelty of the work lies in the fact that the strong stabilizing influence of Lorentz force on blood-based Casson nanofluid enables the red blood cells to pass through the blood in a more streamlined fashion which may play a significant role in human health, more specifically in the cardiovascular system. Further, although the Casson parameter hastens the onset of convection yet Casson fluids are more stable as compared to regular fluids.
{"title":"Magneto-Convection in Casson Nanofluids with Three Different Boundaries","authors":"M. Devi, U. Gupta","doi":"10.1166/jon.2023.2024","DOIUrl":"https://doi.org/10.1166/jon.2023.2024","url":null,"abstract":"This paper is centered on the numerical and analytical solution of a non-Newtonian Casson nanofluid flow problem in the presence of vertical magnetic field. Brownian motion and thermophoretic forces are introduced due to the addition of nanoparticles and; the magnetic field adds an\u0000 extra Lorentz’s force term along with Maxwell’s equations. Using Normal mode technique, the system of PDEs with the corresponding boundary conditions is reduced to a system of ODEs. The Galerkin-type weighted residual method is used to get a numerical solution for the formulated\u0000 differential system. Numerical simulation is carried out to make the investigation helpful for practical applications like nano-drug delivery systems as in clinical and medical research, magnets are extremely important to create three-dimensional images of anatomical and diagnostic importance\u0000 from nuclear magnetic resonance signals. Comparisons of the numerical results with previously published results are made and fine agreements are noted for the considered values of the parameters. The impact of magnetic field, Casson parameter and nanoparticle parameters are discussed for different\u0000 types of boundary conditions (free–free, rigid-free and rigid–rigid). The system is found to be the most stable for more realistic rigid–rigid boundaries out of three different boundaries. For the purpose of numerical computations, blood has been considered as the Casson\u0000 nanofluid. The novelty of the work lies in the fact that the strong stabilizing influence of Lorentz force on blood-based Casson nanofluid enables the red blood cells to pass through the blood in a more streamlined fashion which may play a significant role in human health, more specifically\u0000 in the cardiovascular system. Further, although the Casson parameter hastens the onset of convection yet Casson fluids are more stable as compared to regular fluids.","PeriodicalId":47161,"journal":{"name":"Journal of Nanofluids","volume":" ","pages":""},"PeriodicalIF":4.1,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46494547","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}
Nanofluids are potential coolants for heat transfer applications because of their excellent thermal characteristics. Experimentally the thermophysical properties of ZrO2/ethylene glycol nanofluids are determined at 0.2%, 0.4%, 0.6%, 0.8%, and 1.0% vol. concentrations. A two-step method is used to prepare the stable nanofluids. The ZrO2/EG nanofluids properties were estimated over temperature ranging from 20 °C to 60 °C. From the experimental data, a multi-layer perceptron feed-forward back propagation artificial neural network was developed. Additionally, new correlations were proposed for all the thermophysical properties. The experimental analysis showed that thermal conductivity is enhanced by 19.6% at 60 °C and viscosity is enhanced by 86.62% at 20 °C at 1.0% vol. of nanofluid, density is enhanced by 4.9%, and specific heat is decreased by 4.2% at 1.0% vol. of nanofluid and at 60 °C, over base fluid data. The proposed ANN model succeeded in predicting the target property with minimum RMSE. The results of the developed artificial neural network and its correlation analysis perfectly agree with the experimental data.
{"title":"Experimental Study for Thermophysical Properties of ZrO2/Ethylene Glycol Nanofluid: Developing an ANFIS Modeling and Proposing New Correlations","authors":"L. Sundar, Hiren K. Mewada","doi":"10.1166/jon.2023.2018","DOIUrl":"https://doi.org/10.1166/jon.2023.2018","url":null,"abstract":"Nanofluids are potential coolants for heat transfer applications because of their excellent thermal characteristics. Experimentally the thermophysical properties of ZrO2/ethylene glycol nanofluids are determined at 0.2%, 0.4%, 0.6%, 0.8%, and 1.0% vol. concentrations. A two-step\u0000 method is used to prepare the stable nanofluids. The ZrO2/EG nanofluids properties were estimated over temperature ranging from 20 °C to 60 °C. From the experimental data, a multi-layer perceptron feed-forward back propagation artificial neural network was developed. Additionally,\u0000 new correlations were proposed for all the thermophysical properties. The experimental analysis showed that thermal conductivity is enhanced by 19.6% at 60 °C and viscosity is enhanced by 86.62% at 20 °C at 1.0% vol. of nanofluid, density is enhanced by 4.9%, and specific heat is decreased\u0000 by 4.2% at 1.0% vol. of nanofluid and at 60 °C, over base fluid data. The proposed ANN model succeeded in predicting the target property with minimum RMSE. The results of the developed artificial neural network and its correlation analysis perfectly agree with the experimental data.","PeriodicalId":47161,"journal":{"name":"Journal of Nanofluids","volume":" ","pages":""},"PeriodicalIF":4.1,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44995535","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}
Combined effects of the magnetic field, heat source/sink, and homogeneous–heterogeneous chemical reaction on the three-dimensional fluid flow over a stretching sheet have been examined in this paper. For originality and practicality, the influence of non-linear convection on hybridised nanoparticles of titanium dioxide (TiO2) and silver (Ag) in the non-Newtonian engine oil (EO) are introduced into the governing equations, which are then dimension-free by utilizing appropriate transformations. Williamson fluid model has been employed to determine the rheological features of the considered fluid mixture. MATLAB inbuilt bvp4c solver and Keller box method are proposed for the numerical solution of current fluid theories. Physical elaboration of the graphs is given to recognize the influence on fluid flow and heat transport mechanism in different rising conditions. Based on results, the implication of magnetic field and Williamson parameters restrict the fluid flow for both nanofluid (TiO2/EO) and hybrid nanofluid (TiO2 + Ag/EO). Special case studies of the shape factor effect show more enhancement in heat transfer rate for cylindrically shaped nanoparticles 25.8162% followed by brick-shaped 20.3286% and spherical-shaped 17.0583%. This study will provide better insight into applications including aircraft refrigeration, lubrication, plastic processing, engine and generator cooling, and so forth.
{"title":"Dynamics of Williamson Hybrid Nanofluid Over an Extending Surface with Non-Linear Convection and Shape Factors","authors":"Shikha Chandel, Shilpa Sood","doi":"10.1166/jon.2023.2022","DOIUrl":"https://doi.org/10.1166/jon.2023.2022","url":null,"abstract":"Combined effects of the magnetic field, heat source/sink, and homogeneous–heterogeneous chemical reaction on the three-dimensional fluid flow over a stretching sheet have been examined in this paper. For originality and practicality, the influence of non-linear convection on hybridised\u0000 nanoparticles of titanium dioxide (TiO2) and silver (Ag) in the non-Newtonian engine oil (EO) are introduced into the governing equations, which are then dimension-free by utilizing appropriate transformations. Williamson fluid model has been employed to determine the rheological\u0000 features of the considered fluid mixture. MATLAB inbuilt bvp4c solver and Keller box method are proposed for the numerical solution of current fluid theories. Physical elaboration of the graphs is given to recognize the influence on fluid flow and heat transport mechanism in different rising\u0000 conditions. Based on results, the implication of magnetic field and Williamson parameters restrict the fluid flow for both nanofluid (TiO2/EO) and hybrid nanofluid (TiO2 + Ag/EO). Special case studies of the shape factor effect show more enhancement in heat transfer rate\u0000 for cylindrically shaped nanoparticles 25.8162% followed by brick-shaped 20.3286% and spherical-shaped 17.0583%. This study will provide better insight into applications including aircraft refrigeration, lubrication, plastic processing, engine and generator cooling, and so forth.","PeriodicalId":47161,"journal":{"name":"Journal of Nanofluids","volume":" ","pages":""},"PeriodicalIF":4.1,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42066912","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}
Numerical simulations of water-Al2O3 nanofluid flow in a rectangular channel with two trapezoidal obstacles have been studied, which has rmarkable effect in various engineering applications. The governing equations have been solved using SIMPLEC algorithm and FLUENT software has been used to visualize the simulation results. Motivation of this work is to examine the dynamic behavior of laminar water-Al2O3 nanofluid flow for volume fraction, ψ = 0%, 2%, and 4%. The present study analyzes different hydrothermal flow phenomena with the variation in obstacle height and ψ. Moreover, the simulation results, such as the profiles of velocity, normalized temperature (θ), poiseuille number (CfRe), local Nusselt number (Nu), average Nusselt number (Nuavg) and friction factor (f) have been portrayed with the variations in ψ and Reynolds number (Re). It has been observed that the obstacles increase the convective heat transfer (HT) significantly. At Re = 100, for all the configurations it has been found that the velocity profile become more pronounced for ψ = 4% as compared to ψ = 0%. A linear relationship has been found between the values of f and ψ. It is also found that an increase in Re increases vortex length. It is also shown that variation of volume fraction (ψ) and obstacle height resulted in an indicative change in the normalized temperature and velocity along the center line. In type-1 obstacle configuration, it has been found that Nuavg increases by 6.6% at ψ = 2%, and the same increases by 10.73% at ψ = 4% as compared to that at ψ = 0%. Moreover, it has been found that in type-2 obstacle configuration, value of f increases by approximately 7.9% at ψ = 2% and 13.84% at ψ = 4% as compared to that at ψ = 0%.
{"title":"Thermo-Hydraulic Phenomena of Water-Al2O3 Nanofluid Flow Over a Rectangular Channel with Trapezoidal Obstacles","authors":"S. Saha, V. R. Prasad, O. A. Bég, A. Das","doi":"10.1166/jon.2023.2027","DOIUrl":"https://doi.org/10.1166/jon.2023.2027","url":null,"abstract":"Numerical simulations of water-Al2O3 nanofluid flow in a rectangular channel with two trapezoidal obstacles have been studied, which has rmarkable effect in various engineering applications. The governing equations have been solved using SIMPLEC algorithm and FLUENT\u0000 software has been used to visualize the simulation results. Motivation of this work is to examine the dynamic behavior of laminar water-Al2O3 nanofluid flow for volume fraction, ψ = 0%, 2%, and 4%. The present study analyzes different hydrothermal flow phenomena\u0000 with the variation in obstacle height and ψ. Moreover, the simulation results, such as the profiles of velocity, normalized temperature (θ), poiseuille number (CfRe), local Nusselt number (Nu), average Nusselt number (Nuavg)\u0000 and friction factor (f) have been portrayed with the variations in ψ and Reynolds number (Re). It has been observed that the obstacles increase the convective heat transfer (HT) significantly. At Re = 100, for all the configurations it has been found that the\u0000 velocity profile become more pronounced for ψ = 4% as compared to ψ = 0%. A linear relationship has been found between the values of f and ψ. It is also found that an increase in Re increases vortex length. It is also shown that variation of volume\u0000 fraction (ψ) and obstacle height resulted in an indicative change in the normalized temperature and velocity along the center line. In type-1 obstacle configuration, it has been found that Nuavg increases by 6.6% at ψ = 2%, and the same increases by\u0000 10.73% at ψ = 4% as compared to that at ψ = 0%. Moreover, it has been found that in type-2 obstacle configuration, value of f increases by approximately 7.9% at ψ = 2% and 13.84% at ψ = 4% as compared to that at ψ = 0%.","PeriodicalId":47161,"journal":{"name":"Journal of Nanofluids","volume":" ","pages":""},"PeriodicalIF":4.1,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44446001","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 numerical interventions of two dimensional steady flow of MHD Non-Newtonian nanofluids containing the gyro-tactic microorganisms through porous media over a plate, wedge, and stagnation point are highlighted in this paper. Mainly the Peclet number, bioconvection, Brownian motion, thermophoresis, and heat generation impacts are addressed to consolidate thermal and nanofluid concentration conservative equations with passively controlled boundary conditions for three different geometrical conditions of flow over a plate, wedge, and stagnation point. By considering the impacts of the varying pertinent parameters, namely thermophoresis, Brownian motion, Prandtl number, heat generation, chemical reaction, bio convectional and magnetic parameters, results are analysed graphically for the momentum, temperature, nanoparticle volume fractions, and the density of motile microorganisms profile, as well as the local Nusselt and motile microorganism numbers. Relevant similarity transformations are used to obtain the system of ordinary differential equations and the equations are solved numerically by using Bvp4c via MATLAB based on the shooting technique.
{"title":"Heat Generation and Thermal Radiation Effects on Magneto Hydrodynamics Non Newtonian Casson Nanofluid with Gyro Tactic Microorganisms Over a Plate, Stagnation and Wedge Through Porous Media","authors":"D. Hymavathi, M. Ramachandru, M. Reddy, N. Kishan","doi":"10.1166/jon.2023.1933","DOIUrl":"https://doi.org/10.1166/jon.2023.1933","url":null,"abstract":"The numerical interventions of two dimensional steady flow of MHD Non-Newtonian nanofluids containing the gyro-tactic microorganisms through porous media over a plate, wedge, and stagnation point are highlighted in this paper. Mainly the Peclet number, bioconvection, Brownian motion,\u0000 thermophoresis, and heat generation impacts are addressed to consolidate thermal and nanofluid concentration conservative equations with passively controlled boundary conditions for three different geometrical conditions of flow over a plate, wedge, and stagnation point. By considering the\u0000 impacts of the varying pertinent parameters, namely thermophoresis, Brownian motion, Prandtl number, heat generation, chemical reaction, bio convectional and magnetic parameters, results are analysed graphically for the momentum, temperature, nanoparticle volume fractions, and the density\u0000 of motile microorganisms profile, as well as the local Nusselt and motile microorganism numbers. Relevant similarity transformations are used to obtain the system of ordinary differential equations and the equations are solved numerically by using Bvp4c via MATLAB based on the shooting technique.","PeriodicalId":47161,"journal":{"name":"Journal of Nanofluids","volume":" ","pages":""},"PeriodicalIF":4.1,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44723664","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 article investigate the impact of magnetohydrodynamic nanofluid past a stretching cylinder with chemical reactive species. The momentum, energy and concentration equations are represented by a set of partial differential equations which are moulded into a system of ordinary differential equations using mathematical modelling of the physical problem. After adopting the Runge Kutta Fehlberg approach, the moulded equations are solved using the shooting procedure. To study the effects of various fluid parameters, a parametric analysis was performed. Brownian motion and thermophoresis were investigated in the appealing pattern. The effects of important fluid characteristics, such as outer velocity, chemical reaction, thermophoresis, Lewis number, Brownian motion on concentration, temperature, and velocity have been investigated and shown in graphically and tabulated forms. The core findings of this work is that concentration of the nanofluid decreasing with more reacting species and rate of heat transfer is significantly controlled by outer velocity parameter and magnetic parameter which is very useful in manufacturing processes.
{"title":"Mathematical Modelling of Magnetohydrodynamic Nanofluid Flow with Chemically Reactive Species and Outer Velocity Towards Stretching Cylinder","authors":"Vinita, Parveen Kumar, Vikas Poply","doi":"10.1166/jon.2023.1951","DOIUrl":"https://doi.org/10.1166/jon.2023.1951","url":null,"abstract":"This article investigate the impact of magnetohydrodynamic nanofluid past a stretching cylinder with chemical reactive species. The momentum, energy and concentration equations are represented by a set of partial differential equations which are moulded into a system of ordinary differential equations using mathematical modelling of the physical problem. After adopting the Runge Kutta Fehlberg approach, the moulded equations are solved using the shooting procedure. To study the effects of various fluid parameters, a parametric analysis was performed. Brownian motion and thermophoresis were investigated in the appealing pattern. The effects of important fluid characteristics, such as outer velocity, chemical reaction, thermophoresis, Lewis number, Brownian motion on concentration, temperature, and velocity have been investigated and shown in graphically and tabulated forms. The core findings of this work is that concentration of the nanofluid decreasing with more reacting species and rate of heat transfer is significantly controlled by outer velocity parameter and magnetic parameter which is very useful in manufacturing processes.","PeriodicalId":47161,"journal":{"name":"Journal of Nanofluids","volume":"1 1","pages":""},"PeriodicalIF":4.1,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64647914","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}
Sathy Suresh, S. Shanthi, A. G. Madaki, M. Sathish Kumar, C. Raju
Considering putting in diverse nanoparticles to the base fluid is the latest technique to increase the thermal accomplishment of ordinary fluids. for the present investigation, the flow and heat transfer of nanofluids over a spinning disk with an invariable stretching pace is observed. The non-Fourier flux, magnetic field, and radian heat have all been paid regard to. The nanoparticle used here is Graphene with water as a base fluid. The governing equations are reshaped by utilizing Von Karman transformation and worked it out numerically via boundary value problem solver (bvp5c). We also provided some of the results with magnetic field and beside magnetic field cases and found disparity in both circumstances. Results pointed out that with little proliferation in stretching force constant, the skin friction and the local Nusselt number, the velocity in radial and axial paths improved, when the velocity in the tangential trend and the thermal boundary layer thickness reduce, significantly.
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