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    Computational analysis of heat and mass transfer in a micropolar fluid flow through a porous medium between permeable channel walls

    , Article International Journal of Nonlinear Sciences and Numerical Simulation ; 2021 ; 15651339 (ISSN) Ahmad, S ; Ashraf, M ; Ali, K ; Nisar, K. S ; Sharif University of Technology
    De Gruyter Open Ltd  2021
    Abstract
    The present work numerically investigates the mass and heat transport flow of micropolar fluid in a channel having permeable walls. The appropriate boundary layer approximations are used to convert the system of flow model equations in ODEs, which are then numerically treated with the quasi-linearization method along with finite difference discretization. This technique creates an efficient way to solve the complex dynamical system of equations. A numerical data comparison is presented which assures the accuracy of our code. The outcomes of various problem parameters are portrayed via the graphs and tables. The concentration and temperature accelerate with the impacts of the Peclet numbers... 

    Computational analysis of heat and mass transfer in a micropolar fluid flow through a porous medium between permeable channel walls

    , Article International Journal of Nonlinear Sciences and Numerical Simulation ; 2021 ; 15651339 (ISSN) Ahmad, S ; Ashraf, M ; Ali, K ; Nisar, K. S ; Sharif University of Technology
    De Gruyter Open Ltd  2021
    Abstract
    The present work numerically investigates the mass and heat transport flow of micropolar fluid in a channel having permeable walls. The appropriate boundary layer approximations are used to convert the system of flow model equations in ODEs, which are then numerically treated with the quasi-linearization method along with finite difference discretization. This technique creates an efficient way to solve the complex dynamical system of equations. A numerical data comparison is presented which assures the accuracy of our code. The outcomes of various problem parameters are portrayed via the graphs and tables. The concentration and temperature accelerate with the impacts of the Peclet numbers... 

    Computational analysis of heat and mass transfer in a micropolar fluid flow through a porous medium between permeable channel walls

    , Article International Journal of Nonlinear Sciences and Numerical Simulation ; Volume 23, Issue 5 , 2022 , Pages 761-775 ; 15651339 (ISSN) Ahmad, S ; Ashraf, M ; Ali, K ; Nisar, K. S ; Sharif University of Technology
    De Gruyter Open Ltd  2022
    Abstract
    The present work numerically investigates the mass and heat transport flow of micropolar fluid in a channel having permeable walls. The appropriate boundary layer approximations are used to convert the system of flow model equations in ODEs, which are then numerically treated with the quasi-linearization method along with finite difference discretization. This technique creates an efficient way to solve the complex dynamical system of equations. A numerical data comparison is presented which assures the accuracy of our code. The outcomes of various problem parameters are portrayed via the graphs and tables. The concentration and temperature accelerate with the impacts of the Peclet numbers... 

    Numerical simulation of viscous dissipation in a micropolar fluid flow through a porous medium

    , Article Journal of Applied Mechanics and Technical Physics ; Volume 60, Issue 6 , 2019 , Pages 996-1004 ; 00218944 (ISSN) Ahmad, S ; Ashraf, M ; Ali, K ; Sharif University of Technology]
    Pleiades Publishing  2019
    Abstract
    Taking into account the effect of viscous dissipation in the energy equation, we numerically explore the flow of an incompressible micropolar fluid with heat and mass transfer through a resistive porous medium between plane channel walls. By exploiting a similarity transformation, the governing partial differential equations are transformed into a system of nonlinear coupled ordinary differential equations, which are solved numerically for various problem parameters by means of quasi-linearization. It is found that the effect of viscous dissipation is to increase the heat and mass transfer rate at both the lower and upper walls of the channel. © 2019, Pleiades Publishing, Ltd  

    Analytical solution of turbulent problems using governing equation of cosserat continuum model

    , Article 2006 ASME International Mechanical Engineering Congress and Exposition, IMECE2006, Chicago, IL, 5 November 2006 through 10 November 2006 ; 2006 ; 08888116 (ISSN); 0791837904 (ISBN); 9780791837900 (ISBN) Ghasvari Jahromi, H ; Atefi, Gh ; Moosaie, A ; Hormozi, S ; Sharif University of Technology
    American Society of Mechanical Engineers (ASME)  2006
    Abstract
    In present paper the theory of the micropolar fluid based on a Cosserat continuum model has been applied for analysis of Couette flow and turbulent flow through rough pipes. The obtained results for the velocity field have been compared with known results from experiments done by Reichardt at Max Plank institute for fluids in Gottingen [1,2] and analytical solution of the problem from Gradient theory by alizadeh[3] for couette problem and with known results from experiments done by Nikuradse (1932).the boundary condition used here was the no slip one and Trostel's slip boundary condition[4].a good agreement between experimental results and the results of the problem for Reynolds near 18000... 

    Series solution for heat transfer of continuous stretching sheet immersed in a micropolar fluid in the existence of radiation

    , Article International Journal of Numerical Methods for Heat and Fluid Flow ; Volume 23, Issue 2 , 2013 , Pages 289-304 ; 09615539 (ISSN) Shadloo, M. S ; Kimiaeifar, A ; Bagheri, D ; Sharif University of Technology
    2013
    Abstract
    Purpose - The purpose of this paper is to study a two-dimensional steady convective flow of a micropolar fluid over a stretching sheet in the presence of radiation with constant temperature. Design/methodology/approach - The corresponding momentum, microrotation and energy equations are analytically solved using homotopy analysis method (HAM). Findings - To validate the method, investigate the accuracy and convergence of the results, a comparison with existing numerical and experimental results is done for several cases. Finally, by using the obtained analytical solution, for the skin-friction coefficient and the local Nusselt number as well as the temperature, velocity and angular velocity,... 

    Simulation of thermal radiation in a micropolar fluid flow through a porous medium between channel walls

    , Article Journal of Thermal Analysis and Calorimetry ; Volume 144, Issue 3 , 2021 , Pages 941-953 ; 13886150 (ISSN) Ahmad, S ; Ashraf, M ; Ali, K ; Sharif University of Technology
    Springer Science and Business Media B.V  2021
    Abstract
    Among numerous methods which have been employed to reinforce the thermal efficiency in many systems, one is the thermal radiation which is a mode of heat transfer. Another way to improve the thermal efficiency is the utilization of the porous media. The present work includes the study of micropolar flow with allowance for thermal radiation through a resistive porous medium between channel walls. The governing coupled partial differential equations representing the flow model are transmuted into ordinary ones by using the suitable dimensionless coordinates, and then, quasi-linearization is employed to solve the set of relevant coupled ODEs. Effects of physical parameters on the flow under... 

    Simulation of thermal radiation in a micropolar fluid flow through a porous medium between channel walls

    , Article Journal of Thermal Analysis and Calorimetry ; Volume 144, Issue 3 , 2021 , Pages 941-953 ; 13886150 (ISSN) Ahmad, S ; Ashraf, M ; Ali, K ; Sharif University of Technology
    Springer Science and Business Media B.V  2021
    Abstract
    Among numerous methods which have been employed to reinforce the thermal efficiency in many systems, one is the thermal radiation which is a mode of heat transfer. Another way to improve the thermal efficiency is the utilization of the porous media. The present work includes the study of micropolar flow with allowance for thermal radiation through a resistive porous medium between channel walls. The governing coupled partial differential equations representing the flow model are transmuted into ordinary ones by using the suitable dimensionless coordinates, and then, quasi-linearization is employed to solve the set of relevant coupled ODEs. Effects of physical parameters on the flow under... 

    Effect of non-Newtonian flow due to thermally-dependent properties over an inclined surface in the presence of chemical reaction, Brownian motion and thermophoresis

    , Article Alexandria Engineering Journal ; Volume 60, Issue 5 , 2021 , Pages 4931-4945 ; 11100168 (ISSN) Ahmad, S ; Ahmad, A ; Ali, K ; Bashir, H ; Iqbal, M. F ; Sharif University of Technology
    Elsevier B.V  2021
    Abstract
    The aim of present study is to investigate the convective heat and mass transfer in steady MHD boundary layer flow of an electrically conducting micropolar fluid over an inclined surface. Partial differential equations resulting from the mathematical modeling of the phenomenon are reduce to nonlinear ODEs, and a finite difference based scheme has been adopted to iteratively find the numerical solution by employing the successive over-relaxation (SOR) method. A self-developed computer code has been used in the MATLAB environment. Influence of chemical reaction, Brownian motion, thermophoresis, and viscous dissipation on the relevant features of the flow are discussed and analyzed through... 

    Effect of non-Newtonian flow due to thermally-dependent properties over an inclined surface in the presence of chemical reaction, Brownian motion and thermophoresis

    , Article Alexandria Engineering Journal ; Volume 60, Issue 5 , 2021 , Pages 4931-4945 ; 11100168 (ISSN) Ahmad, S ; Ahmad, A ; Ali, K ; Bashir, H ; Iqbal, M. F ; Sharif University of Technology
    Elsevier B.V  2021
    Abstract
    The aim of present study is to investigate the convective heat and mass transfer in steady MHD boundary layer flow of an electrically conducting micropolar fluid over an inclined surface. Partial differential equations resulting from the mathematical modeling of the phenomenon are reduce to nonlinear ODEs, and a finite difference based scheme has been adopted to iteratively find the numerical solution by employing the successive over-relaxation (SOR) method. A self-developed computer code has been used in the MATLAB environment. Influence of chemical reaction, Brownian motion, thermophoresis, and viscous dissipation on the relevant features of the flow are discussed and analyzed through...