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Tasawar Hayat - One of the best experts on this subject based on the ideXlab platform.
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Entropy Generation minimization egm in magneto peristalsis with variable properties
Computer Methods and Programs in Biomedicine, 2020Co-Authors: Sajid Farooq, Ijaz M Khan, Tasawar Hayat, Ahmed AlsaediAbstract:Abstract Objective and background This article featuring the peristaltic transport of viscous material with variable properties (i.e. temperature dependent viscosity and thermal conductivity) through curved configuration. Fluid saturating through porous channel walls of uniform space. Entropy Generation consideration here is to analyze irreversibility aspects. Channel boundaries retain the velocity and thermal slip conditions. Method Wave frame of reference is attained with the utilization of long wavelength and small Reynolds number approach. Solution of the simplified coupled system of dimensionless constraints is obtained numerically. Detailed analysis of important quantities of interest has been presented in discussion portion. Results Entropy Generation variation near center is very small whereas in the vicinity of the channel wall is larger. Bejan number has reverse variation as observed for Entropy Generation. Conclusion Variable characteristics of viscosity has opposite impact on velocity and temperature is observed. It is also noticed small irreversibility effects are obtained for higher varying viscosity and thermal conductivity near the vicinity of the channel walls.
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Entropy Generation and endoscopic effects on peristalsis with modified darcy s law
Physica A-statistical Mechanics and Its Applications, 2019Co-Authors: Tasawar Hayat, Sadaf Nawaz, Ahmed AlsaediAbstract:Abstract Present attempt highlights the outcome of endoscopy and Entropy Generation in MHD peristaltic flow of Sisko fluid. Unlike the traditional approach, the flow modeling for porous medium is based upon modified Darcy’s law. Silent features of Joule heating and viscous dissipation are investigated. Convective conditions for heat transfer are utilized. The problem after invoking long wavelength approximation is numerically solved. Graphical analysis provides physical insight. Graphs are plotted for velocity, temperature, Entropy Generation, Bejan number and heat transfer coefficient for the pertinent parameters of interest. Results discloses the enhancement in Darcy number enhanced the fluid velocity and temperature. It also caused an enhancement in Entropy Generation and Bejan number. Magnetic field leads to enhance the temperature and Entropy Generation. Moreover the flexible wall parameters show increasing trend for elastance coefficients whereas damping coefficient resists the fluid velocity.
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Entropy Generation in flow of carreau nanofluid
Journal of Molecular Liquids, 2019Co-Authors: Ijaz M Khan, Tasawar Hayat, Amit Kumar, M Waqas, Ramayan SinghAbstract:Abstract This article examines hydromagnetic flow of Carreau nanomaterial over a stretched surface. Buongiorno nanofluid model is used in mathematical modelling. Here thermophoresis and Brownian diffusion are slip mechanisms under consideration. Energy equation is modelled via heat source/sink, Joule heating, nonlinear radiation and dissipation effects. The compact form of flow equations are changed to components forms through implementation of boundary layer concept. Suitable transformations give rise to ODEs. The obtained system is solved through homotopy method. The velocity, mass concentration, Entropy Generation, temperature, skin friction, Bejan number and Nusselt number are examined through graphical sketch. The obtained outcomes present that Entropy Generation boosts for higher magnetic parameter, Brinkman number and concentration ratio parameter while it diminishes via Brownian diffusion parameter.
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Entropy Generation in flow of ferromagnetic liquid with nonlinear radiation and slip condition
Journal of Molecular Liquids, 2019Co-Authors: Madiha Rashid, Ijaz M Khan, Tasawar Hayat, Imran M Khan, Ahmed AlsaediAbstract:Abstract Here, flow of magnetite nanoliquid by nonlinear stretching sheet is considered. Heat source/sink and nonlinear radiation are explored. Velocity and thermal slip aspects in Fe3O4-nanoliquid flow modelling are retained. Present study focuses on Entropy Generation analysis. Viscous dissipation, non-linear thermal radiation and joule heating irreversibilities are accounted. Formulated problems computed by Optimal Homotopy algorithm. The velocity, temperature, Entropy Generation, Bejan number, skin friction and heat transfer rate are discussed. It is observed that Entropy Generation rates enhances for Brinkman number and solid volume fraction of nanoparticles while reverse behavior of Bejan number holds.
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Entropy Generation for flow of sisko fluid due to rotating disk
Journal of Molecular Liquids, 2018Co-Authors: Sumaira Qayyum, Muhammad Imran Khan, Tasawar Hayat, Muhammad Ijaz Khan, Ahmed AlsaediAbstract:Abstract This investigation deals with Entropy Generation optimization and nonlinear dissipative flow of Sisko fluid due to a rotating disk. Joule heating effect is considered. Mathematical model is obtained for the present flow problem. Nonlinear systems are solved for convergent series solutions. Analysis of various flow variables on Bejan number, volumetric Entropy Generation rate, temperature and velocity are discussed. Present analysis depicts that irreversibility rate (Entropy Generation rate) and Bejan number are enhanced for radiation parameter, whereas reverse behavior is noticed for Brinkman number and material parameter. The velocity and temperature fields are increasing for larger material parameter and temperature ratio parameter. The obtained results are helpful in understanding the irreversibility (Entropy Generation) for flow of non-Newtonian fluids. Comparative study is made for temperature, velocity, Bejan number and Entropy Generation by considering shear thickening and thinning fluids. Finally, a comparison is given with the previous available results.
Ahmed Alsaedi - One of the best experts on this subject based on the ideXlab platform.
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Entropy Generation minimization egm in magneto peristalsis with variable properties
Computer Methods and Programs in Biomedicine, 2020Co-Authors: Sajid Farooq, Ijaz M Khan, Tasawar Hayat, Ahmed AlsaediAbstract:Abstract Objective and background This article featuring the peristaltic transport of viscous material with variable properties (i.e. temperature dependent viscosity and thermal conductivity) through curved configuration. Fluid saturating through porous channel walls of uniform space. Entropy Generation consideration here is to analyze irreversibility aspects. Channel boundaries retain the velocity and thermal slip conditions. Method Wave frame of reference is attained with the utilization of long wavelength and small Reynolds number approach. Solution of the simplified coupled system of dimensionless constraints is obtained numerically. Detailed analysis of important quantities of interest has been presented in discussion portion. Results Entropy Generation variation near center is very small whereas in the vicinity of the channel wall is larger. Bejan number has reverse variation as observed for Entropy Generation. Conclusion Variable characteristics of viscosity has opposite impact on velocity and temperature is observed. It is also noticed small irreversibility effects are obtained for higher varying viscosity and thermal conductivity near the vicinity of the channel walls.
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Entropy Generation and endoscopic effects on peristalsis with modified darcy s law
Physica A-statistical Mechanics and Its Applications, 2019Co-Authors: Tasawar Hayat, Sadaf Nawaz, Ahmed AlsaediAbstract:Abstract Present attempt highlights the outcome of endoscopy and Entropy Generation in MHD peristaltic flow of Sisko fluid. Unlike the traditional approach, the flow modeling for porous medium is based upon modified Darcy’s law. Silent features of Joule heating and viscous dissipation are investigated. Convective conditions for heat transfer are utilized. The problem after invoking long wavelength approximation is numerically solved. Graphical analysis provides physical insight. Graphs are plotted for velocity, temperature, Entropy Generation, Bejan number and heat transfer coefficient for the pertinent parameters of interest. Results discloses the enhancement in Darcy number enhanced the fluid velocity and temperature. It also caused an enhancement in Entropy Generation and Bejan number. Magnetic field leads to enhance the temperature and Entropy Generation. Moreover the flexible wall parameters show increasing trend for elastance coefficients whereas damping coefficient resists the fluid velocity.
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Entropy Generation in flow of ferromagnetic liquid with nonlinear radiation and slip condition
Journal of Molecular Liquids, 2019Co-Authors: Madiha Rashid, Ijaz M Khan, Tasawar Hayat, Imran M Khan, Ahmed AlsaediAbstract:Abstract Here, flow of magnetite nanoliquid by nonlinear stretching sheet is considered. Heat source/sink and nonlinear radiation are explored. Velocity and thermal slip aspects in Fe3O4-nanoliquid flow modelling are retained. Present study focuses on Entropy Generation analysis. Viscous dissipation, non-linear thermal radiation and joule heating irreversibilities are accounted. Formulated problems computed by Optimal Homotopy algorithm. The velocity, temperature, Entropy Generation, Bejan number, skin friction and heat transfer rate are discussed. It is observed that Entropy Generation rates enhances for Brinkman number and solid volume fraction of nanoparticles while reverse behavior of Bejan number holds.
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Entropy Generation for flow of sisko fluid due to rotating disk
Journal of Molecular Liquids, 2018Co-Authors: Sumaira Qayyum, Muhammad Imran Khan, Tasawar Hayat, Muhammad Ijaz Khan, Ahmed AlsaediAbstract:Abstract This investigation deals with Entropy Generation optimization and nonlinear dissipative flow of Sisko fluid due to a rotating disk. Joule heating effect is considered. Mathematical model is obtained for the present flow problem. Nonlinear systems are solved for convergent series solutions. Analysis of various flow variables on Bejan number, volumetric Entropy Generation rate, temperature and velocity are discussed. Present analysis depicts that irreversibility rate (Entropy Generation rate) and Bejan number are enhanced for radiation parameter, whereas reverse behavior is noticed for Brinkman number and material parameter. The velocity and temperature fields are increasing for larger material parameter and temperature ratio parameter. The obtained results are helpful in understanding the irreversibility (Entropy Generation) for flow of non-Newtonian fluids. Comparative study is made for temperature, velocity, Bejan number and Entropy Generation by considering shear thickening and thinning fluids. Finally, a comparison is given with the previous available results.
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Entropy Generation minimization egm for convection nanomaterial flow with nonlinear radiative heat flux
Journal of Molecular Liquids, 2018Co-Authors: Muhammad Ijaz Khan, Tasawar Hayat, Muhammad Imran Khan, Siraj Ullah, Ahmed AlsaediAbstract:Abstract Here Entropy Generation and magnetohydrodynamics (MHD) impacts in unsteady viscous nanoliquid flow are elaborated. Flow induced is by impermeable rotating disk. Application of thermodynamic second law is employed for the analysis of Entropy Generation. Nanofluid characteristics have been addressed through thermophoresis and Brownian movement. Nonlinear versions of mixed convection and thermal radiation are introduced simultaneously. The process of non-dimensionalization is performed via implementation of suitable variables. Nonlinear computations have been carried out. The rate of total Entropy Generation is evaluated for distinct arising variables. Skin-friction and Nusselt and Sherwood numbers in addition to velocity, temperature and nanoparticles concentration are emphasized. We found increasing trend in temperature and velocity for unsteadiness factor whereas opposite scenario is noticed regarding nanoparticles concentration. Entropy Generation rate enhances with increasing of Brinkman number, Eckert number and magnetic parameter while the opposite behavior is recorded for Reynolds number. While Bejan number has direct relation to Eckert number, Reynolds number, and magnetic parameter, While for Brinkman number the situation is opposite. Moreover the surface acts as effective source of irreversibility when Entropy Generation rate is closed to the surface is higher.
Ijaz M Khan - One of the best experts on this subject based on the ideXlab platform.
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Entropy Generation minimization egm in magneto peristalsis with variable properties
Computer Methods and Programs in Biomedicine, 2020Co-Authors: Sajid Farooq, Ijaz M Khan, Tasawar Hayat, Ahmed AlsaediAbstract:Abstract Objective and background This article featuring the peristaltic transport of viscous material with variable properties (i.e. temperature dependent viscosity and thermal conductivity) through curved configuration. Fluid saturating through porous channel walls of uniform space. Entropy Generation consideration here is to analyze irreversibility aspects. Channel boundaries retain the velocity and thermal slip conditions. Method Wave frame of reference is attained with the utilization of long wavelength and small Reynolds number approach. Solution of the simplified coupled system of dimensionless constraints is obtained numerically. Detailed analysis of important quantities of interest has been presented in discussion portion. Results Entropy Generation variation near center is very small whereas in the vicinity of the channel wall is larger. Bejan number has reverse variation as observed for Entropy Generation. Conclusion Variable characteristics of viscosity has opposite impact on velocity and temperature is observed. It is also noticed small irreversibility effects are obtained for higher varying viscosity and thermal conductivity near the vicinity of the channel walls.
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Entropy Generation in flow of carreau nanofluid
Journal of Molecular Liquids, 2019Co-Authors: Ijaz M Khan, Tasawar Hayat, Amit Kumar, M Waqas, Ramayan SinghAbstract:Abstract This article examines hydromagnetic flow of Carreau nanomaterial over a stretched surface. Buongiorno nanofluid model is used in mathematical modelling. Here thermophoresis and Brownian diffusion are slip mechanisms under consideration. Energy equation is modelled via heat source/sink, Joule heating, nonlinear radiation and dissipation effects. The compact form of flow equations are changed to components forms through implementation of boundary layer concept. Suitable transformations give rise to ODEs. The obtained system is solved through homotopy method. The velocity, mass concentration, Entropy Generation, temperature, skin friction, Bejan number and Nusselt number are examined through graphical sketch. The obtained outcomes present that Entropy Generation boosts for higher magnetic parameter, Brinkman number and concentration ratio parameter while it diminishes via Brownian diffusion parameter.
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Entropy Generation in flow of ferromagnetic liquid with nonlinear radiation and slip condition
Journal of Molecular Liquids, 2019Co-Authors: Madiha Rashid, Ijaz M Khan, Tasawar Hayat, Imran M Khan, Ahmed AlsaediAbstract:Abstract Here, flow of magnetite nanoliquid by nonlinear stretching sheet is considered. Heat source/sink and nonlinear radiation are explored. Velocity and thermal slip aspects in Fe3O4-nanoliquid flow modelling are retained. Present study focuses on Entropy Generation analysis. Viscous dissipation, non-linear thermal radiation and joule heating irreversibilities are accounted. Formulated problems computed by Optimal Homotopy algorithm. The velocity, temperature, Entropy Generation, Bejan number, skin friction and heat transfer rate are discussed. It is observed that Entropy Generation rates enhances for Brinkman number and solid volume fraction of nanoparticles while reverse behavior of Bejan number holds.
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nonlinear radiative heat flux and heat source sink on Entropy Generation minimization rate
Physica B-condensed Matter, 2018Co-Authors: Ijaz M Khan, Tasawar Hayat, Waleed Ahmed M Khan, Ahmed AlsaediAbstract:Abstract Entropy Generation minimization in nonlinear radiative mixed convective flow towards a variable thicked surface is addressed. Entropy Generation for momentum and temperature is carried out. The source for this flow analysis is stretching velocity of sheet. Transformations are used to reduce system of partial differential equations into ordinary ones. Total Entropy Generation rate is determined. Series solutions for the zeroth and mth order deformation systems are computed. Domain of convergence for obtained solutions is identified. Velocity, temperature and concentration fields are plotted and interpreted. Entropy equation is studied through nonlinear mixed convection and radiative heat flux. Velocity and temperature gradients are discussed through graphs. Meaningful results are concluded in the final remarks.
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new thermodynamics of Entropy Generation minimization with nonlinear thermal radiation and nanomaterials
Physics Letters A, 2018Co-Authors: Ahmed Alsaedi, Sumaira Qayyum, Tasawar Hayat, Ijaz M Khan, Imran M KhanAbstract:Abstract This research addressed Entropy Generation for MHD stagnation point flow of viscous nanofluid over a stretching surface. Characteristics of heat transport are analyzed through nonlinear radiation and heat Generation/absorption. Nanoliquid features for Brownian moment and thermophoresis have been considered. Fluid in the presence of constant applied inclined magnetic field is considered. Flow problem is mathematically modeled and governing expressions are changed into nonlinear ordinary ones by utilizing appropriate transformations. The effects of pertinent variables on velocity, nanoparticle concentration and temperature are discussed graphically. Furthermore Brownian motion and thermophoresis effects on Entropy Generation and Bejan number have been examined. Total Entropy Generation is inspected through various flow variables. Consideration is mainly given to the convergence process. Velocity, temperature and mass gradients at the surface of sheet are calculated numerically.
A R Balakrishnan - One of the best experts on this subject based on the ideXlab platform.
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Entropy Generation during natural convection in a porous cavity effect of thermal boundary conditions
Numerical Heat Transfer Part A-applications, 2012Co-Authors: Tanmay Basak, Ram Satish Kaluri, A R BalakrishnanAbstract:Entropy Generation plays a significant role in the overall efficiency of a given system, and a judicious choice of optimal boundary conditions can be made based on a knowledge of Entropy Generation. Five different boundary conditions are considered and their effect of the permeability of the porous medium, heat transfer regime (conduction and convection) on Entropy Generation due to heat transfer, and fluid friction irreversibilities are investigated in detail for molten metals (Pr = 0.026) and aqueous solutions (Pr = 10), with Darcy numbers (Da) between 10−5–10−3 and at a representative high Rayleigh number, Ra = 5 × 105. It is observed that the Entropy Generation rates are reduced in sinusoidal heating (case 2) when compared to that for uniform heating (case 1), with a penalty on thermal mixing. Finally, the analysis of total Entropy Generation due to variation in Da and thermal mixing and temperature uniformity indicates that, there exists an intermediate Da for optimal values of Entropy Generation, th...
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effects of thermal boundary conditions on Entropy Generation during natural convection
Numerical Heat Transfer Part A-applications, 2011Co-Authors: Tanmay Basak, Ram Satish Kaluri, A R BalakrishnanAbstract:A comprehensive numerical study on Entropy Generation during natural convection is studied in a square cavity subjected to a wide variety of thermal boundary conditions. Entropy Generation terms involving thermal and velocity gradients are evaluated accurately based on the elemental basis set via the Galerkin finite element method. The thermal and fluid irreversibilities during the conduction and convection dominant regimes are analyzed in detail for various fluids (Pr = 0.026,988.24) within Ra = 103–105. Further, the effect of Ra on the total Entropy Generation and average Bejan number is discussed. It is observed that thermal boundary conditions significantly affect the thermal mixing, temperature uniformity, and the Entropy Generation in the cavity. A case where the bottom wall is hot isothermal with linearly cooled side walls and adiabatic top wall is found to result in high thermal mixing and a higher degree of temperature uniformity with minimum total Entropy Generation.
Muhammad Ijaz Khan - One of the best experts on this subject based on the ideXlab platform.
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Entropy Generation for flow of sisko fluid due to rotating disk
Journal of Molecular Liquids, 2018Co-Authors: Sumaira Qayyum, Muhammad Imran Khan, Tasawar Hayat, Muhammad Ijaz Khan, Ahmed AlsaediAbstract:Abstract This investigation deals with Entropy Generation optimization and nonlinear dissipative flow of Sisko fluid due to a rotating disk. Joule heating effect is considered. Mathematical model is obtained for the present flow problem. Nonlinear systems are solved for convergent series solutions. Analysis of various flow variables on Bejan number, volumetric Entropy Generation rate, temperature and velocity are discussed. Present analysis depicts that irreversibility rate (Entropy Generation rate) and Bejan number are enhanced for radiation parameter, whereas reverse behavior is noticed for Brinkman number and material parameter. The velocity and temperature fields are increasing for larger material parameter and temperature ratio parameter. The obtained results are helpful in understanding the irreversibility (Entropy Generation) for flow of non-Newtonian fluids. Comparative study is made for temperature, velocity, Bejan number and Entropy Generation by considering shear thickening and thinning fluids. Finally, a comparison is given with the previous available results.
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Entropy Generation minimization egm for convection nanomaterial flow with nonlinear radiative heat flux
Journal of Molecular Liquids, 2018Co-Authors: Muhammad Ijaz Khan, Tasawar Hayat, Muhammad Imran Khan, Siraj Ullah, Ahmed AlsaediAbstract:Abstract Here Entropy Generation and magnetohydrodynamics (MHD) impacts in unsteady viscous nanoliquid flow are elaborated. Flow induced is by impermeable rotating disk. Application of thermodynamic second law is employed for the analysis of Entropy Generation. Nanofluid characteristics have been addressed through thermophoresis and Brownian movement. Nonlinear versions of mixed convection and thermal radiation are introduced simultaneously. The process of non-dimensionalization is performed via implementation of suitable variables. Nonlinear computations have been carried out. The rate of total Entropy Generation is evaluated for distinct arising variables. Skin-friction and Nusselt and Sherwood numbers in addition to velocity, temperature and nanoparticles concentration are emphasized. We found increasing trend in temperature and velocity for unsteadiness factor whereas opposite scenario is noticed regarding nanoparticles concentration. Entropy Generation rate enhances with increasing of Brinkman number, Eckert number and magnetic parameter while the opposite behavior is recorded for Reynolds number. While Bejan number has direct relation to Eckert number, Reynolds number, and magnetic parameter, While for Brinkman number the situation is opposite. Moreover the surface acts as effective source of irreversibility when Entropy Generation rate is closed to the surface is higher.
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Entropy Generation in flow with silver and copper nanoparticles
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2018Co-Authors: Tasawar Hayat, Sumaira Qayyum, Muhammad Ijaz Khan, Ahmed AlsaediAbstract:Abstract The purpose of this attempt is mainly to explore the mixed convective flow of viscous fluid by a rotating disk. Thermal radiation, Joule heating, variable thickness and viscous dissipation have been accounted. Flow under consideration is because of nonlinear stretching characteristics of disk. Water is treated as traditional fluid while nanoparticles include silver and copper. Fluid is electrically conducting subject to applied magnetic field with constant strength. Heat Generation and absorption is neglected. An Entropy Generation analysis is utilized through second law of thermodynamics. The effects of silver and copper nanoparticles on the thermal conductivity of continuous phase fluid and Entropy Generation have been also examined. Total Entropy Generation rate is scrutinized for different involved variables. Nonlinear formulation based upon conservation laws of mass, momentum and energy is made. Attention is particularly given to the convergence in the computational process. Velocity and thermal gradients at the surface of disk are obtained in tabular forms. Main conclusions have been indicated.