The Experts below are selected from a list of 150 Experts worldwide ranked by ideXlab platform
Tasawar Hayat - One of the best experts on this subject based on the ideXlab platform.
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Modeling and analysis of peristalsis of hybrid nanofluid with entropy generation
Journal of Thermal Analysis and Calorimetry, 2020Co-Authors: Tasawar Hayat, Sadaf Nawaz, Ahmed AlsaediAbstract:This investigation intends to explore the peristaltic transport of rotating fluid in a channel. The channel is considered symmetric with flexible walls, and porous medium fills the saturated space. In this analysis, hybrid nanofluid consisting of titanium oxides and copper particles is taken. Water is used as the base fluid. MHD and Hall effects are employed in this problem. Formulation of energy equation is based on radiation and non-uniform heat source or sink parameter. Convection conditions are utilized for the boundary. Thermodynamics second relation is employed for entropy generation. Maxwell–Garnetts model of thermal conductivity is employed. Numerical analysis is carried out using NDSolve of Mathematica. The effect of nanoparticle volume fraction, Taylor number, Hartman number, porosity and Hall parameters is analyzed for axial and secondary velocities, temperature, entropy generation and heat transfer rate. This study divulges that an enhancement in rotation parameter caused an increase in secondary velocity. Moreover, as volume fraction of nanoparticles enhances from 0.01 to 0.04, decay is noticed in fluid’s axial and secondary velocities. In this case, entropy also decreases. This study further disclosed that heat transfer rate gradually increases as we exceed the volume fraction of nanoparticles from 0.02 to 0.08. More pores also lead to an enhancement in fluid velocity, temperature and entropy.
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modeling for radiated marangoni convection flow of magneto nanoliquid subject to activation energy and chemical reaction
Scientia Iranica, 2020Co-Authors: Ikram Ullah, Tasawar Hayat, Ahmed Alsaedi, S AsgharAbstract:Simultaneous impacts of non-linear radiation and magnetohydrodynamics in Marangoni convection nanoliquid are addressed Novel aspects of activation energy and space dependent heat source are addressed. Nanoliquid attributes Brownain movement and thermophoresis diffusion. NDSolve base shooting technique is employed for the numerical simulation. Aspects of various embedded variables are focused on velocity, heat and mass transport distributions via graphical interpretations. Moreover temperature gradient at the surface is estimated and analyzed. Our study identified that exponential based space heat source (ESHS) parameter significantly enhanced the thermal field. Activation energy and temperature difference parameters decrease the nanoparticles concentration. Moreover temperature gradient enhances for higher Marangoni ratio parameter, Hartmann number, dimensionless activation energy and thermophoresis parameter.
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Entropy optimization for peristalsis of Rabinowitsch nanomaterial
Applied Nanoscience, 2020Co-Authors: Tasawar Hayat, Ahmed Alsaedi, Sadaf Nawaz, Habib M. FardounAbstract:This work models new formulation for peristaltic activity of Rabinowitsch material in a compliant walls channel. Energy equation is accounted in the presence of viscous dissipation and heat source/sink. Chemical reaction is included in concentration expression. Nanomaterial characteristics are due to Brownian motion and thermophoresis. Slip condition is utilized for velocity, temperature and concentration. Exact solution is obtained for velocity. Further NDSolve is utilized for the graphical analysis of temperature, concentration, entropy and heat transfer coefficient at the wall. Results are also analyzed for viscous, shear thickening and shear thinning fluids. This study reveals the results that the shear thinning fluids move with greater velocity than the viscous and shear thickening fluids. Similarly, temperature and entropy generation also has higher values for shear thinning case when compared with others. Further heat source parameter enhances the temperature, whereas sink parameter leads to decay. Slip parameter for velocity and temperature caused an increase in the respective velocity and temperature. Moreover, chemical reaction parameter leads to enhancement in temperature and entropy generation in case of viscous, shear thickening and shear thinning fluids. However, shear thinning fluids are found prominent.
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influence of arrhenius activation energy in mhd flow of third grade nanofluid over a nonlinear stretching surface with convective heat and mass conditions
Physica A-statistical Mechanics and Its Applications, 2020Co-Authors: Tasawar Hayat, Arsalan Aziz, Rubina Riaz, Ahmed AlsaediAbstract:Abstract This topic addresses the influence of binary chemical reaction and activation energy in hydromagnetic flow of third grade nanofluid associated with convective conditions. Flow is developed through nonlinearly stretched surface. Nanoparticles concentration and temperature profiles are considered in the presence of Brownian dispersion and thermophoresis effects. Third grade liquid is electrically conducted via uniform applied magnetic field. Assumption of boundary layer has been used in the problem development. Governing differential systems have been computed in frame of NDSolve. The graphical illustrations explore influences of various sundry variables. Further surface drag force, heat and mass transfer rate are sketched and analyzed. Temperature and concentration distributions are declared increasing functions of Hartman number while reverse trend is seen for velocity distribution. Furthermore an enhancement is observed in temperature and concentration distributions for the higher values of thermal and concentration Biot numbers respectively.
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characterization of marangoni forced convection in casson nanoliquid flow with joule heating and irreversibility
Entropy, 2020Co-Authors: Muhammad Sadiq, Tasawar HayatAbstract:The Marangoni forced convective inclined magnetohydrodynamic flow is examined. Marangoni forced convection depends on the differences in surface pressure computed by magnetic field, temperature, and concentration gradient. Casson nanoliquid flow by an infinite disk is considered. Viscous dissipation, heat flux, and Joule heating are addressed in energy expressions. Thermophoresis and Brownian motion are also examined. Entropy generation is computed. The physical characteristics of entropy optimization with Arrhenius activation energy are discussed. Nonlinear PDE’s are reduced to highly nonlinear ordinary systems with appropriate transformations. A nonlinear system is numerically computed by the NDSolve technique. The salient characteristics of velocity, temperature, concentration, entropy generation, and Bejan number are explained. The computational results of the heat-transfer rate and concentration gradient are examined through tables. Velocity and temperature have reverse effects for the higher approximation of the Marangoni number. Velocity is a decreasing function of the Casson fluid parameter. Temperature is enhanced for higher radiation during reverse hold for concentration against the Marangoni number. The Bejan number and entropy generation have similar effects for Casson fluid and radiation parameters. For a higher estimation of the Brinkman number, the entropy optimization is augmented.
Ahmed Alsaedi - One of the best experts on this subject based on the ideXlab platform.
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Modeling and analysis of peristalsis of hybrid nanofluid with entropy generation
Journal of Thermal Analysis and Calorimetry, 2020Co-Authors: Tasawar Hayat, Sadaf Nawaz, Ahmed AlsaediAbstract:This investigation intends to explore the peristaltic transport of rotating fluid in a channel. The channel is considered symmetric with flexible walls, and porous medium fills the saturated space. In this analysis, hybrid nanofluid consisting of titanium oxides and copper particles is taken. Water is used as the base fluid. MHD and Hall effects are employed in this problem. Formulation of energy equation is based on radiation and non-uniform heat source or sink parameter. Convection conditions are utilized for the boundary. Thermodynamics second relation is employed for entropy generation. Maxwell–Garnetts model of thermal conductivity is employed. Numerical analysis is carried out using NDSolve of Mathematica. The effect of nanoparticle volume fraction, Taylor number, Hartman number, porosity and Hall parameters is analyzed for axial and secondary velocities, temperature, entropy generation and heat transfer rate. This study divulges that an enhancement in rotation parameter caused an increase in secondary velocity. Moreover, as volume fraction of nanoparticles enhances from 0.01 to 0.04, decay is noticed in fluid’s axial and secondary velocities. In this case, entropy also decreases. This study further disclosed that heat transfer rate gradually increases as we exceed the volume fraction of nanoparticles from 0.02 to 0.08. More pores also lead to an enhancement in fluid velocity, temperature and entropy.
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modeling for radiated marangoni convection flow of magneto nanoliquid subject to activation energy and chemical reaction
Scientia Iranica, 2020Co-Authors: Ikram Ullah, Tasawar Hayat, Ahmed Alsaedi, S AsgharAbstract:Simultaneous impacts of non-linear radiation and magnetohydrodynamics in Marangoni convection nanoliquid are addressed Novel aspects of activation energy and space dependent heat source are addressed. Nanoliquid attributes Brownain movement and thermophoresis diffusion. NDSolve base shooting technique is employed for the numerical simulation. Aspects of various embedded variables are focused on velocity, heat and mass transport distributions via graphical interpretations. Moreover temperature gradient at the surface is estimated and analyzed. Our study identified that exponential based space heat source (ESHS) parameter significantly enhanced the thermal field. Activation energy and temperature difference parameters decrease the nanoparticles concentration. Moreover temperature gradient enhances for higher Marangoni ratio parameter, Hartmann number, dimensionless activation energy and thermophoresis parameter.
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Entropy optimization for peristalsis of Rabinowitsch nanomaterial
Applied Nanoscience, 2020Co-Authors: Tasawar Hayat, Ahmed Alsaedi, Sadaf Nawaz, Habib M. FardounAbstract:This work models new formulation for peristaltic activity of Rabinowitsch material in a compliant walls channel. Energy equation is accounted in the presence of viscous dissipation and heat source/sink. Chemical reaction is included in concentration expression. Nanomaterial characteristics are due to Brownian motion and thermophoresis. Slip condition is utilized for velocity, temperature and concentration. Exact solution is obtained for velocity. Further NDSolve is utilized for the graphical analysis of temperature, concentration, entropy and heat transfer coefficient at the wall. Results are also analyzed for viscous, shear thickening and shear thinning fluids. This study reveals the results that the shear thinning fluids move with greater velocity than the viscous and shear thickening fluids. Similarly, temperature and entropy generation also has higher values for shear thinning case when compared with others. Further heat source parameter enhances the temperature, whereas sink parameter leads to decay. Slip parameter for velocity and temperature caused an increase in the respective velocity and temperature. Moreover, chemical reaction parameter leads to enhancement in temperature and entropy generation in case of viscous, shear thickening and shear thinning fluids. However, shear thinning fluids are found prominent.
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influence of arrhenius activation energy in mhd flow of third grade nanofluid over a nonlinear stretching surface with convective heat and mass conditions
Physica A-statistical Mechanics and Its Applications, 2020Co-Authors: Tasawar Hayat, Arsalan Aziz, Rubina Riaz, Ahmed AlsaediAbstract:Abstract This topic addresses the influence of binary chemical reaction and activation energy in hydromagnetic flow of third grade nanofluid associated with convective conditions. Flow is developed through nonlinearly stretched surface. Nanoparticles concentration and temperature profiles are considered in the presence of Brownian dispersion and thermophoresis effects. Third grade liquid is electrically conducted via uniform applied magnetic field. Assumption of boundary layer has been used in the problem development. Governing differential systems have been computed in frame of NDSolve. The graphical illustrations explore influences of various sundry variables. Further surface drag force, heat and mass transfer rate are sketched and analyzed. Temperature and concentration distributions are declared increasing functions of Hartman number while reverse trend is seen for velocity distribution. Furthermore an enhancement is observed in temperature and concentration distributions for the higher values of thermal and concentration Biot numbers respectively.
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entropy analysis for the peristalsis flow with homogeneous heterogeneous reaction
European Physical Journal Plus, 2020Co-Authors: Tasawar Hayat, Sadaf Nawaz, Ahmed AlsaediAbstract:Our major focus in this analysis is to study the peristaltic motion of fluid by considering the homogeneous–heterogeneous reaction aspect. Prandtl nanofluid has been carried out for this purpose. Magnetic field is applied in the perpendicular direction to the flow. Joule heating effect is also considered in this analysis. Buongiorno nanofluid model has been used which incorporates two prominent slip mechanisms, i.e., Brownian motion and thermophoresis. The second law of thermodynamics has been utilized for entropy generation analysis. No-slip boundary conditions are employed for the considered analysis. NDSolve command of Mathematica 9.0 is employed for the solution of problem. Graphs for pertinent parameters are plotted and analyzed. These graphs contain velocity, temperature, homogeneous–heterogeneous reaction, entropy, and heat transfer coefficient. Key points of the investigation are collected in the conclusion.
Ijaz M Khan - One of the best experts on this subject based on the ideXlab platform.
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entropy generation minimization in bio convective flow of nanofluid with activation energy and gyrotactic micro organisms
AIP Advances, 2021Co-Authors: Fazal Haq, Ijaz M Khan, M Saleem, Yasser Elmasry, Ronnason ChinramAbstract:This article addresses the entropy generation in mixed convection magnetohydrodynamics Eyring–Powell nanofluid flow toward a permeable surface of a cylinder. The flow is modeled considering heat generation and chemical reaction aspects. The influence of buoyancy forces, magnetic field, and thermal radiation is also considered. Moreover, activation energy, viscous dissipation, and permeability effects on bio-nanofluid flow are assimilated in modeling of concentration and energy relations. Total entropy generation is modeled in view of the second thermodynamics law. The governing system of PDEs is deduced by incorporating boundary layer assumptions. Relevant transformations are used to reduce the dimensional flow model into a non-dimensional one. The built-in shooting technique and the NDSolve code in Mathematica software are used to handle the dimensionless flow expressions. Variation in velocity, temperature, concentration, motile micro-organisms, Bejan number, and entropy generation with respect to the involved parameters is scrutinized graphically. Surface drag force, heat transfer rate, mass transfer rate, and density number are further calculated and investigated. Important results are summarized at the end.
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modeling and theoretical analysis of gyrotactic microorganisms in radiated nanomaterial williamson fluid with activation energy
Journal of materials research and technology, 2020Co-Authors: Fazal Haq, Seifedine Kadry, Yuming Chu, Mair Khan, Ijaz M KhanAbstract:Abstract Here flow behavior of stratified Williamson nanofluid over porous surface of stretching cylinder is examined. The concept of gyrotactic miscroorganisms is implemented to control the random movement of suspended nanoparticles. Effects of magnetic field is accounted. Further chemical reaction with Arrhenius activation energy is considered for the modeling of concentration equation. Brownian motion and thermophoresis effects are further considered. The flow model is obtained by employing the boundary layer assumptions. Appropriate transformations are used to reduced the dimensional system into non-dimensional ones. NDSolve code in MATHEMATICA software is used to tackle the obtained non-dimensional flow expressions. Behavior of velocity, mass concentration, temperature and motile microorganisms versus involved variables is examined graphically. The engineering curiosity like skin friction coefficient, heat and mass transfer rates (Nusselt and Sherwood numbers) and density number are computed and analyzed. Important observations are highlighted at the end.
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magnetohydrodynamics mhd radiated nanomaterial viscous material flow by a curved surface with second order slip and entropy generation
Computer Methods and Programs in Biomedicine, 2020Co-Authors: Riaz Muhammad, Ijaz M Khan, Niaz B Khan, Mohammed JameelAbstract:Abstract Background:Magnetohydrodynamics or hydro-magnetics (MHD) is the study of dynamics in the presence of magnetic characteristics and impact of electrically conducting liquids which has a significant applications in engineering and biomedical sciences. Liquid metals, plasma, electrolytes and salt water are the examples of such magneto-fluids. MHD liquid flow in various geometries significant to engineering sciences is an interesting and noteworthy scientific area because of applications. The above applications of magnetohydrodynamics insist the engineers and analyst to develop new mathematical modeling in the field of fluid mechanics. Therefore, we considered electrical conducting viscous fluid flow over a curved surface with second order slip. The Buongiorno model is utilized in the modeling of flow problem with thermophoretic and Brownian diffusions. The effects of viscous dissipation, thermal radiation and Joule heating (Ohmic heating) is used in the modeling of energy equation. Homogeneous-heterogeneous reactions are further considered. The energy equation is modeled. Method:The nonlinear ODE’s are obtained through utilization of appropriate transformations and numerical results are computed via NDSolve MATHEMATICA. Results: Velocity field is decreasing function of first order slip parameter. Both Bejan number and entropy generation is upsurged versus heterogeneous reaction parameter.
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fully developed darcy forchheimer mixed convective flow over a curved surface with activation energy and entropy generation
Computer Methods and Programs in Biomedicine, 2020Co-Authors: Riaz Muhammad, Ijaz M Khan, Mohammed Jameel, Niaz B KhanAbstract:Abstract Background: Mixed convection (forced+natural convection) is frequently observed in exceptionally high output devices where the forced convection isn’t sufficient to dissipate all of the heat essential. At this point, consolidating natural convection with forced convection will frequently convey the ideal outcomes. Nuclear reactor technology and a few features of electronic cooling are the examples of these processes. Mixed convection problems are categorized by Richardson number (Ri), which is the ratio of Grashof number (for natural convection) and Reynolds number (for forced convection). For buoyancy or mixed convection the relative effect can be addressed by Richardson number. Typically, the natural convection is negligible when Richardson number is less than 0.1 (Ri 10) and neither is negligible when (0.1 Method: Curvilinear transformations are utilized to change the nonlinear PDE’s into ordinary ones. Computational outcomes are obtained via NDSolve MATHEMATICA. The results are computed and discussed graphically. Results: Velocity decays for Forchheimer number. Entropy generation enhances for diffusion parameter and chemical reaction parameter. Concentration profile reduces chemical reaction parameter and enhances for activation parameter.
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on entropy generation effectiveness in flow of power law fluid with cubic autocatalytic chemical reaction
Applied Nanoscience, 2019Co-Authors: Faisal M Javed, Riaz Muhammad, Ijaz M Khan, Niaz B Khan, Muhammad Waqas, Muftooh Ur Rehman, Sajjad Wali Khan, Tahir M HassanAbstract:Here, cubic autocatalysis in radiative flow of power law fluid is addressed. Flow is examined by a stretched surface. Heat generation/absorption, nonlinear radiation and dissipation effect are utilized in modeling of energy equation. Through implementation of second thermodynamics law, the entropy rate is calculated. Further entropy generation is explored with respect to homogeneous and heterogeneous mass concentrations. Nonlinear system is tackled via NDSolve of MATHEMATICA. Impacts of pertinent variables associated with flow are physically discussed for the velocity, entropy generation, temperature and concentration fields. Clearly, entropy augmentation rate is controlled through Brinkman number. Main key points are presented.
Bashir Ahmad - One of the best experts on this subject based on the ideXlab platform.
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entropy generation minimization darcy forchheimer nanofluid flow due to curved stretching sheet with partial slip
International Communications in Heat and Mass Transfer, 2020Co-Authors: Tasawar Hayat, Ahmed Alsaedi, Sumaira Qayyum, Bashir AhmadAbstract:Abstract This paper explores the Darcy-Forchheimer two-dimensional flow of nanofluid due to curved stretching sheet. Brownian motion and thermophoresis effects are taken in to account. Bejan number and entropy generation are analyzed in presence of MHD, convective boundary conditions, partial slip and viscous dissipation. Nonlinear ordinary differential systems are developed through transformations. Convergent series solutions are constructed by using NDSolve of MATHEMATICA. Behavior of involved variables on flow characteristics is shown through graphs. Velocity reduces for higher slip parameter and Forchheimer number. Temperature and concentration have direct relation with thermal and solutal Biot numbers. An increase in entropy generation is seen for higher curvature parameter, porosity parameter and Brinkman number. Decrease in Bejan number is observed for higher estimations of Brinkman number and slip parameter. Comparative study of present results with previous information in a limiting sense is made.
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influence of variable viscosity and radial magnetic field on peristalsis of copper water nanomaterial in a non uniform porous medium
International Journal of Heat and Mass Transfer, 2016Co-Authors: Tasawar Hayat, A. Alsaedi, Shahid Farooq, Bashir AhmadAbstract:Abstract Paramount idea of this article is to model peristaltic flow of copper-water for spherical and cylindrical shape magneto-nanoparticles in a curved channel. The nanomaterial saturates a non-uniform permeable medium in which the porosity of the medium fluctuate with the distance from the channel boundaries. H–C model is considered to predict the effective thermal conductivity of the nanomaterial. Effects of radial magnetic field, variable viscosity and mixed convection are also accounted. The boundary conditions yield the second order velocity and thermal slip effects. Assumptions of small Reynolds number and large wavelength approximation are utilized to simplify the governing equations. Final form of the system of equations are solved numerically through NDSolved command in Mathematica 8 software. Influence of embedded parameters on velocity, temperature and heat transfer rate of the nanomaterial at upper wall of the channel are physically interpreted. Comparison between the spherical and cylindrical shapes magneto-nanoparticles is also presented. Graphical results shows that pressure gradient and pressure rise are enhanced for both radial magnetic field parameter and nanoparticle volume fraction. Velocity of the nanomaterial increases when variable viscosity parameter is enhanced.
Riaz Muhammad - One of the best experts on this subject based on the ideXlab platform.
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magnetohydrodynamics mhd radiated nanomaterial viscous material flow by a curved surface with second order slip and entropy generation
Computer Methods and Programs in Biomedicine, 2020Co-Authors: Riaz Muhammad, Ijaz M Khan, Niaz B Khan, Mohammed JameelAbstract:Abstract Background:Magnetohydrodynamics or hydro-magnetics (MHD) is the study of dynamics in the presence of magnetic characteristics and impact of electrically conducting liquids which has a significant applications in engineering and biomedical sciences. Liquid metals, plasma, electrolytes and salt water are the examples of such magneto-fluids. MHD liquid flow in various geometries significant to engineering sciences is an interesting and noteworthy scientific area because of applications. The above applications of magnetohydrodynamics insist the engineers and analyst to develop new mathematical modeling in the field of fluid mechanics. Therefore, we considered electrical conducting viscous fluid flow over a curved surface with second order slip. The Buongiorno model is utilized in the modeling of flow problem with thermophoretic and Brownian diffusions. The effects of viscous dissipation, thermal radiation and Joule heating (Ohmic heating) is used in the modeling of energy equation. Homogeneous-heterogeneous reactions are further considered. The energy equation is modeled. Method:The nonlinear ODE’s are obtained through utilization of appropriate transformations and numerical results are computed via NDSolve MATHEMATICA. Results: Velocity field is decreasing function of first order slip parameter. Both Bejan number and entropy generation is upsurged versus heterogeneous reaction parameter.
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fully developed darcy forchheimer mixed convective flow over a curved surface with activation energy and entropy generation
Computer Methods and Programs in Biomedicine, 2020Co-Authors: Riaz Muhammad, Ijaz M Khan, Mohammed Jameel, Niaz B KhanAbstract:Abstract Background: Mixed convection (forced+natural convection) is frequently observed in exceptionally high output devices where the forced convection isn’t sufficient to dissipate all of the heat essential. At this point, consolidating natural convection with forced convection will frequently convey the ideal outcomes. Nuclear reactor technology and a few features of electronic cooling are the examples of these processes. Mixed convection problems are categorized by Richardson number (Ri), which is the ratio of Grashof number (for natural convection) and Reynolds number (for forced convection). For buoyancy or mixed convection the relative effect can be addressed by Richardson number. Typically, the natural convection is negligible when Richardson number is less than 0.1 (Ri 10) and neither is negligible when (0.1 Method: Curvilinear transformations are utilized to change the nonlinear PDE’s into ordinary ones. Computational outcomes are obtained via NDSolve MATHEMATICA. The results are computed and discussed graphically. Results: Velocity decays for Forchheimer number. Entropy generation enhances for diffusion parameter and chemical reaction parameter. Concentration profile reduces chemical reaction parameter and enhances for activation parameter.
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on entropy generation effectiveness in flow of power law fluid with cubic autocatalytic chemical reaction
Applied Nanoscience, 2019Co-Authors: Faisal M Javed, Riaz Muhammad, Ijaz M Khan, Niaz B Khan, Muhammad Waqas, Muftooh Ur Rehman, Sajjad Wali Khan, Tahir M HassanAbstract:Here, cubic autocatalysis in radiative flow of power law fluid is addressed. Flow is examined by a stretched surface. Heat generation/absorption, nonlinear radiation and dissipation effect are utilized in modeling of energy equation. Through implementation of second thermodynamics law, the entropy rate is calculated. Further entropy generation is explored with respect to homogeneous and heterogeneous mass concentrations. Nonlinear system is tackled via NDSolve of MATHEMATICA. Impacts of pertinent variables associated with flow are physically discussed for the velocity, entropy generation, temperature and concentration fields. Clearly, entropy augmentation rate is controlled through Brinkman number. Main key points are presented.
